CAN COMMUNICATION SYSTEM, Diagnostic DTC:U1002, U0265

DTC Code	DTC Name
U1002	Lost Communication with Gateway Module (Network Gateway ECU)
U0265	Lost Communication with Parking Assist Monitor Module

DESCRIPTION

The network gateway ECU will store this DTC when no signals are received from the ECUs that have been memorized as those that are connected to sub bus 2.
When the network gateway ECU receives a response signal from the ECUs connected to sub bus 2, the network gateway ECU recognizes and memorizes that the ECU is connected to sub bus 2. Based on this memorized data, the network gateway ECU monitors for malfunctions in the ECUs connected to sub bus 2 when communicating with those ECUs. If the network gateway ECU does not receive response signals from the ECUs that have been memorized as those connected to sub bus 2, the network gateway ECU determines that a malfunction exists.

DTC No.	DTC Detection Condition	Trouble Area
U1002	The network gateway ECU does not receive signals from all ECUs that have been memorized as those connected to sub bus 2.	Open or short in sub bus 2 main lines or connector Open or short in sub bus 2 branch lines or connector Network gateway ECU Rear television camera assembly1 Driving support ECU assembly2 Lane departure warning camera2 Blind spot monitor sensor RH3 Open or short in CAN No. 3 junction connector Open or short in CAN No. 5 junction connector Open or short in CAN No. 6 junction connector Open or short in CAN No. 7 junction connector Open or short in CAN No. 8 junction connector
U0265	No communication from the rear television camera assembly continues.	Rear television camera assembly branch line or connector Power source circuit of rear television camera assembly Rear television camera assembly ground circuit Rear television camera assembly

*1: w/ Parking Assist Monitor System
*2: w/ Pre-collision System
*3: w/ Blind Spot Monitor System

Tech Tips

This diagnosis procedure is for when DTC U1002 is output by the network gateway ECU (Techstream display: Gateway).

WIRING DIAGRAM

INSPECTION PROCEDURE

Note

Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work Click here.
Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output Click here.
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the ignition switch to ON, turn the blind spot monitor main switch on wait at least 20 seconds and then drive the vehicle at a speed of 5 km/h (3 mph) or more for 6.2 seconds or more.
After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed Click here.

Tech Tips

Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE

CHECK VEHICLE TYPE

Check vehicle type.

Result

Result	Proceed to
w/o Pre-collision system	A
w/ Pre-collision system	B

CHECK SUB BUS 2 Click here

CHECK SUB BUS 2

Disconnect the cable from the negative (-) battery terminal.

Text in Illustration
*a	Component with harness connected (Network Gateway ECU)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
I81-13 (CA2H) - I81-12 (CA2L)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	Below 54 Ω: Short circuit between bus lines
I81-13 (CA2H) - I81-12 (CA2L)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	70 Ω or higher: Open circuit in main bus lines
I81-13 (CA2H) - I81-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
I81-12 (CA2L) - I81-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
I81-13 (CA2H) - I81-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
I81-12 (CA2L) - I81-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

Result

Result	Proceed to
OK	A
Open circuit in CAN main bus lines	B
Short circuit between bus lines	C
Ground short +B short	D

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NETWORK GATEWAY ECU) Click here

CHECK FOR SHORT IN SUB BUS 2 LINES (NETWORK GATEWAY ECU) Click here

CHECK FOR SHORT IN SUB BUS 2 LINE (NETWORK GATEWAY ECU) Click here

CHECK VEHICLE TYPE

Check vehicle type.

Result

Result	Proceed to
w/ Parking assist monitor system	A
w/ Blind spot monitor system	B

CHECK FOR OPEN IN SUB BUS 2 BRANCH LINES (BLIND SPOT MONITOR SENSOR RH) Click here

CHECK FOR OPEN IN SUB BUS 2 BRANCH LINES (REAR TELEVISION CAMERA ASSEMBLY)

Text in Illustration

*a
Front view of wire harness connector

(to Rear Television Camera Assembly)

Disconnect the T23 rear television camera assembly connector.

Text in Illustration
*a	Front view of wire harness connector (to Rear Television Camera Assembly)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
T23-4 (CANH) - T23-1 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (CAN NO. 6 J/C - REAR TELEVISION CAMERA ASSEMBLY)

CHECK FOR DTC OUTPUT (PARKING ASSIST MONITOR SYSTEM)

Reconnect the T23 rear television camera assembly connector.
Reconnect the cable to the negative (-) battery terminal.
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Clear the DTCs.
Turn the ignition switch off.
Turn the ignition switch to ON.
Turn the Techstream on.

Enter the following menus: Chassis / Advanced Parking Guidance/Parking Assist Monitor / Trouble Codes.

Result

Proceed to

DTC C1621 is not output from the rear television camera assembly.

(Techstream display: Advanced Parking Guidance/Parking Assist Monitor)

DTC C1621 is output from the rear television camera assembly.

(Techstream display: Advanced Parking Guidance/Parking Assist Monitor)

GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here

CHECK FOR DTC OUTPUT

Enter the following menus: Body Electrical / Gateway / Trouble Codes.

Result

Proceed to

DTC U1002 is not output from the network gateway ECU.

(Techstream display: Gateway)

DTC U1002 is output from the network gateway ECU.

(Techstream display: Gateway)

REPLACE NETWORK GATEWAY ECU Click here

SYMPTOMS SIMULATION Click here

REPLACE NETWORK GATEWAY ECU
1. Replace the network gateway ECU Click here.
NEXT

CHECK FOR DTC OUTPUT

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Clear the DTCs.
Turn the ignition switch off.
Turn the ignition switch to ON.
Turn the Techstream on.

Enter the following menus: Body Electrical / Gateway / Trouble Codes.

Result

Proceed to

DTC U1002 is not output from the network gateway ECU.

(Techstream display: Gateway)

DTC U1002 is output from the network gateway ECU.

(Techstream display: Gateway)

REPLACE REAR TELEVISION CAMERA ASSEMBLY

END

CHECK FOR OPEN IN SUB BUS 2 BRANCH LINES (BLIND SPOT MONITOR SENSOR RH)

Text in Illustration

*a
Front view of wire harness connector

(to Blind Spot Monitor Sensor RH)

Disconnect the O28 blind spot monitor sensor RH connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
O28-2 (CA1P) - O28-7 (CA1N)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (CAN NO. 3 J/C - BLIND SPOT MONITOR SENSOR RH)

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

Text in Illustration
*a	Front view of wire harness connector (to Blind Spot Monitor Sensor RH)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
O28-10 (BRGD) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

Reconnect the cable to the negative (-) battery terminal.

Text in Illustration
*a	Front view of wire harness connector (to Blind Spot Monitor Sensor RH)

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
O28-5 (BRB) - Body ground	Ignition switch ON	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH)

CHECK FOR DTC OUTPUT

Enter the following menus: Body Electrical / Gateway / Trouble Codes.

Result

Proceed to

DTC U1002 is not output from the network gateway ECU.

(Techstream display: Gateway)

DTC U1002 is output from the network gateway ECU.

(Techstream display: Gateway)

REPLACE NETWORK GATEWAY ECU Click here

SYMPTOMS SIMULATION Click here

REPLACE NETWORK GATEWAY ECU
1. Replace the network gateway ECU Click here.
NEXT

CHECK FOR DTC OUTPUT

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Clear the DTCs.
Turn the ignition switch off.
Turn the ignition switch to ON.
Turn the Techstream on.

Enter the following menus: Body Electrical / Gateway / Trouble Codes.

Result

Proceed to

DTC U1002 is not output from the network gateway ECU.

(Techstream display: Gateway)

DTC U1002 is output from the network gateway ECU.

(Techstream display: Gateway)

REPLACE BLIND SPOT MONITOR SENSOR RH Click here

END

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NETWORK GATEWAY ECU)

Text in Illustration

*a
Front view of wire harness connector

(to Network Gateway ECU)

Disconnect the I81 network gateway ECU connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
I81-13 (CA2H) - I81-12 (CA2L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 3 J/C) Click here

REPLACE NETWORK GATEWAY ECU Click here

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 3 J/C)

Reconnect the I81 network gateway ECU connector.

Text in Illustration
*a	Front view of wire harness connector (to CAN No. 3 Junction Connector)
*b	to CAN No. 6 Junction Connector
*c	to CAN No. 7 Junction Connector

Disconnect the O30 CAN No. 3 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
O30-10 (CANH) - O30-21 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 6 junction connector
O30-11 (CANH) - O30-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 7 junction connector

Result

Result	Proceed to
OK	A
NG (to CAN No. 6 junction connector main bus lines)	B
NG (to CAN No. 7 junction connector main bus lines)	C

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 6 J/C) Click here

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 7 J/C) Click here

REPLACE CAN NO. 3 JUNCTION CONNECTOR

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 6 J/C)

Reconnect the O30 CAN No. 3 junction connector.

Text in Illustration
*a	Front view of wire harness connector (to CAN No. 6 Junction Connector)
*b	to CAN No. 5 Junction Connector
*c	to CAN No. 3 Junction Connector

Disconnect the T24 CAN No. 6 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
T24-9 (CANH) - T24-20 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 5 junction connector
T24-11 (CANH) - T24-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 3 junction connector

Result

Result	Proceed to
OK	A
NG (to CAN No. 5 junction connector main bus lines)	B
NG (to CAN No. 3 junction connector main bus lines)	C

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 5 J/C) Click here

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 6 J/C)

REPLACE CAN NO. 6 JUNCTION CONNECTOR

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 5 J/C)

Reconnect the T24 CAN No. 6 junction connector.
Text in Illustration

*a
Rear view of wire harness connector

(to CAN No. 5 Junction Connector)

Disconnect the T16 CAN No. 5 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
T16-3 (CANH) - T16-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 5 J/C - CAN NO. 6 J/C)

REPLACE CAN NO. 5 JUNCTION CONNECTOR

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 7 J/C)

Reconnect the O30 CAN No. 3 junction connector.

Text in Illustration
*a	Rear view of wire harness connector (to CAN No. 7 Junction Connector)
*b	to CAN No. 3 Junction Connector
*c	to Network Gateway ECU

Disconnect the I192 and I193 wire harness connectors.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
I192-1 (CANH) - I192-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Network gateway ECU
I193-1 (CANH) - I193-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 3 junction connector

Wiring Color

Code

Color

CANH Side

Color

CANL Side

Connected to

I192

Network gateway ECU

I193

CAN No. 3 junction connector

Result

Result	Proceed to
OK	A
NG (to CAN No. 3 junction connector main bus lines)	B
NG (to network gateway ECU main bus lines)	C

Note

Before disconnecting the connectors, make a note of where they are connected.
Reconnect each connector to its original position.

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 7 J/C)

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 7 J/C - NETWORK GATEWAY ECU)

REPLACE CAN NO. 7 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINES (NETWORK GATEWAY ECU)

Text in Illustration

*a
Front view of wire harness connector

(to Network Gateway ECU)

Disconnect the I81 network gateway ECU connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
I81-13 (CA2H) - I81-12 (CA2L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 3 J/C) Click here

REPLACE NETWORK GATEWAY ECU Click here

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 3 J/C)

Reconnect the I81 network gateway ECU connector.

Text in Illustration
*a	Front view of wire harness connector (to CAN No. 3 Junction Connector)
*b	to Blind Spot Monitor Sensor RH
*c	to CAN No. 6 Junction Connector
*d	to CAN No. 7 Junction Connector

Disconnect the O30 CAN No. 3 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
O30-9 (CA1P) - O30-20 (CA1N)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Blind spot monitor sensor RH*
O30-10 (CANH) - O30-21 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 6 junction connector
O30-11 (CANH) - O30-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 7 junction connector

*: w/ Blind Spot Monitor System

Result

Result	Proceed to
OK	A
NG (to CAN No. 6 junction connector main bus lines)	B
NG (to CAN No. 7 junction connector main bus lines)	C
NG (to Blind spot monitor sensor RH)	D

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 6 J/C) Click here

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 7 J/C) Click here

CHECK FOR SHORT IN SUB BUS 2 LINES (ECU, SENSOR) Click here

REPLACE CAN NO. 3 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 6 J/C)

Reconnect the O30 CAN No. 3 junction connector.

Text in Illustration
*a	Front view of wire harness connector (to CAN No. 6 Junction Connector)
*b	to CAN No. 5 Junction Connector
*c	to Rear Television Camera Assembly
*d	to CAN No. 3 Junction Connector

Disconnect the T24 CAN No. 6 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
T24-9 (CANH) - T24-20 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 5 junction connector
T24-10 (CANH) - T24-21 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Rear television camera assembly*
T24-11 (CANH) - T24-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 3 junction connector

*: w/ Parking Assist Monitor System

Result

Result	Proceed to
OK	A
NG (to CAN No. 5 junction connector main bus lines)	B
NG (to rear television camera assembly branch lines)	C
NG (to CAN No. 3 junction connector main bus lines)	D

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 5 J/C) Click here

CHECK FOR SHORT IN SUB BUS 2 LINES (ECU, SENSOR) Click here

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 6 J/C)

REPLACE CAN NO. 6 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 5 J/C)

Reconnect the T24 CAN No. 6 junction connector.
Text in Illustration

*a
Rear view of wire harness connector

(to CAN No. 5 Junction Connector)

Disconnect the T16 CAN No. 5 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
T16-3 (CANH) - T16-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 5 J/C - CAN NO. 6 J/C)

REPLACE CAN NO. 5 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 7 J/C)

Reconnect the O30 CAN No. 3 junction connector.

Text in Illustration
*a	Rear view of wire harness connector (to CAN No. 7 Junction Connector)
*b	to CAN No. 3 Junction Connector
*c	to Network Gateway ECU

Disconnect the I192 and I193 wire harness connectors.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
I192-1 (CANH) - I192-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Network gateway ECU
I193-1 (CANH) - I193-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 3 junction connector

Wiring Color

Code

Color

CANH Side

Color

CANL Side

Connected to

I192

Network gateway ECU

I193

CAN No. 3 junction connector

Result

Result	Proceed to
OK	A
NG (to CAN No. 3 junction connector main bus lines)	B
NG (to network gateway ECU main bus lines)	C

Note

Before disconnecting the connectors, make a note of where they are connected.
Reconnect each connector to its original position.

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 7 J/C)

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 7 J/C - NETWORK GATEWAY ECU)

REPLACE CAN NO. 7 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINE (NETWORK GATEWAY ECU)

Text in Illustration

*a
Front view of wire harness connector

(to Network Gateway ECU)

Disconnect the I81 network gateway ECU connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
I81-13 (CA2H) - I81-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
I81-12 (CA2L) - I81-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
I81-13 (CA2H) - I81-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
I81-12 (CA2L) - I81-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 3 J/C) Click here

REPLACE NETWORK GATEWAY ECU Click here

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 3 J/C)

Reconnect the I81 network gateway ECU connector.

Disconnect the O30 CAN No. 3 junction connector.

Text in Illustration
*1	DLC3	-	-
*a	Front view of wire harness connector (to CAN No. 3 Junction Connector)	*b	to Blind Spot Monitor Sensor RH (w/ Blind Spot Monitor System)
*c	to CAN No. 6 Junction Connector	*d	to CAN No. 7 Junction Connector

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
O30-9 (CA1P) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	Blind spot monitor sensor RH*
O30-20 (CA1N) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	Blind spot monitor sensor RH*
O30-10 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	CAN No. 6 junction connector
O30-21 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	CAN No. 6 junction connector
O30-11 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	CAN No. 7 junction connector
O30-22 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	CAN No. 7 junction connector
O30-9 (CA1P) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Blind spot monitor sensor RH*
O30-20 (CA1N) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Blind spot monitor sensor RH*
O30-10 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	CAN No. 6 junction connector
O30-21 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	CAN No. 6 junction connector
O30-11 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	CAN No. 7 junction connector
O30-22 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	CAN No. 7 junction connector

*: w/ Blind Spot Monitor System

Result

Result	Proceed to
OK	A
NG (to CAN No. 6 junction connector main bus line)	B
NG (to CAN No. 7 junction connector main bus line)	C
NG (to Blind spot monitor sensor RH)	D

Tech Tips

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 6 J/C) Click here

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 7 J/C) Click here

CHECK FOR SHORT IN SUB BUS 2 LINE (ECU, SENSOR) Click here

REPLACE CAN NO. 3 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 6 J/C)

Reconnect the O30 CAN No. 3 junction connector.

Disconnect the T24 CAN No. 6 junction connector.

Text in Illustration
*1	DLC3	-	-
*a	Front view of wire harness connector (to CAN No. 6 Junction Connector)	*b	to CAN No. 5 Junction Connector
*c	to Rear Television Camera Assembly	*d	to CAN No. 3 Junction Connector

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
T24-9 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	CAN No. 5 junction connector
T24-20 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	CAN No. 5 junction connector
T24-10 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	Rear television camera assembly
T24-21 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	Rear television camera assembly
T24-11 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	CAN No. 3 junction connector
T24-22 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	CAN No. 3 junction connector
T24-9 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	CAN No. 5 junction connector
T24-20 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	CAN No. 5 junction connector
T24-10 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Rear television camera assembly
T24-21 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Rear television camera assembly
T24-11 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	CAN No. 3 junction connector
T24-22 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	CAN No. 3 junction connector

Result

Result	Proceed to
OK	A
NG (to CAN No. 5 junction connector main bus line)	B
NG (to rear television camera assembly branch line)	C
NG (to CAN No. 3 junction connector main bus line)	D

Tech Tips

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 5 J/C) Click here

CHECK FOR SHORT IN SUB BUS 2 LINE (ECU, SENSOR) Click here

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 6 J/C)

REPLACE CAN NO. 6 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 5 J/C)

Reconnect the T24 CAN No. 6 junction connector.

Text in Illustration
*1	DLC3
*a	Front view of wire harness connector (to CAN No. 5 Junction Connector)

Disconnect the T16 CAN No. 5 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
T16-3 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
T16-2 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
T16-3 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
T16-2 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

Tech Tips

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 5 J/C - CAN NO. 6 J/C)

REPLACE CAN NO. 5 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 7 J/C)

Reconnect the O30 CAN No. 3 junction connector.

Disconnect the I192 and I193 wire harness connectors.

Text in Illustration
*1	DLC3	-	-
*a	Rear view of wire harness connector (to CAN No. 7 Junction Connector)	*b	to CAN No. 3 Junction Connector
*c	to Network Gateway ECU	-	-

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
I192-1 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	Network gateway ECU
I192-2 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	Network gateway ECU
I193-1 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	CAN No. 3 junction connector
I193-2 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	CAN No. 3 junction connector
I192-1 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Network gateway ECU
I192-2 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Network gateway ECU
I193-1 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	CAN No. 3 junction connector
I193-2 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	CAN No. 3 junction connector

Wiring Color

Code

Color

CANH Side

Color

CANL Side

Connected to

I192

Network gateway ECU

I193

CAN No. 3 junction connector

Result

Result	Proceed to
OK	A
NG (to CAN No. 3 junction connector main bus line)	B
NG (to network gateway ECU main bus line)	C

Note

Before disconnecting the connectors, make a note of where they are connected.
Reconnect each connector to its original position.

Tech Tips

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 7 J/C)

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 7 J/C - NETWORK GATEWAY ECU)

REPLACE CAN NO. 7 JUNCTION CONNECTOR

CHECK SUB BUS 2

Disconnect the cable from the negative (-) battery terminal.

Text in Illustration
*a	Component with harness connected (Network Gateway ECU)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
I81-13 (CA2H) - I81-12 (CA2L)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	Below 54 Ω: Short circuit between bus lines
I81-13 (CA2H) - I81-12 (CA2L)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω	70 Ω or higher: Open circuit in main bus lines
I81-13 (CA2H) - I81-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
I81-12 (CA2L) - I81-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
I81-13 (CA2H) - I81-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
I81-12 (CA2L) - I81-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

Result

Result	Proceed to
OK	A
Open circuit in CAN main bus lines	B
Short circuit between bus lines	C
Ground short +B short	D

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NETWORK GATEWAY ECU) Click here

CHECK FOR SHORT IN SUB BUS 2 LINES (NETWORK GATEWAY ECU) Click here

CHECK FOR SHORT IN SUB BUS 2 LINE (NETWORK GATEWAY ECU) Click here

RECONFIRM DTC OUTPUT

Reconnect the cable to the negative (-) battery terminal.
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Clear the DTCs.
Turn the ignition switch off.

Turn the ignition switch to ON and recheck for DTCs.

Result

Proceed to

DTC U1002 is output from the network gateway ECU

(Techstream display: Gateway)

Other DTC is output.

GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here

REPLACE NETWORK GATEWAY ECU Click here

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (NETWORK GATEWAY ECU)

Text in Illustration

*a
Front view of wire harness connector

(to Network Gateway ECU)

Disconnect the I81 network gateway ECU connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
I81-13 (CA2H) - I81-12 (CA2L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 7 J/C) Click here

REPLACE NETWORK GATEWAY ECU Click here

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 7 J/C)

Reconnect the I81 network gateway ECU connector.

Text in Illustration
*a	Rear view of wire harness connector (to CAN No. 7 Junction Connector)
*b	to CAN No. 8 Junction Connector
*c	to CAN No. 3 Junction Connector

Disconnect the I193 and I195 wire harness connectors.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
I193-1 (CANH) - I193-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 3 junction connector
I195-1 (CANH) - I195-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 8 junction connector

Wiring Color

Code

Color

CANH Side

Color

CANL Side

Connected to

I193

CAN No. 3 junction connector

I195

CAN No. 8 junction connector

Result

Result	Proceed to
OK	A
NG (to CAN No. 8 junction connector main bus lines)	B
NG (to CAN No. 3 junction connector main bus lines)	C

Note

Before disconnecting the connectors, make a note of where they are connected.
Reconnect each connector to its original position.

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 8 J/C) Click here

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 3 J/C) Click here

REPLACE CAN NO. 7 JUNCTION CONNECTOR

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 8 J/C)

Reconnect the I193 and I195 wire harness connectors.

Text in Illustration
*a	Front view of wire harness connector (to CAN No. 8 Junction Connector)
*b	to CAN No. 7 Junction Connector
*c	to Network Gateway ECU

Disconnect the S22 CAN No. 8 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
S22-2 (CANH) - S22-8 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 7 junction connector
S22-3 (CANH) - S22-9 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Network gateway ECU

Result

Result	Proceed to
OK	A
NG (to CAN No. 7 junction connector main bus lines)	B
NG (to network gateway ECU main bus lines)	C

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 7 J/C - CAN NO. 8 J/C)

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 8 J/C - NETWORK GATEWAY ECU)

REPLACE CAN NO. 8 JUNCTION CONNECTOR

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 3 J/C)

Disconnect the I193 and I195 wire harness connectors.

Text in Illustration
*a	Front view of wire harness connector (to CAN No. 3 Junction Connector)
*b	to CAN No. 6 Junction Connector
*c	to CAN No. 7 Junction Connector

Disconnect the O30 CAN No. 3 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
O30-10 (CANH) - O30-21 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 6 junction connector
O30-11 (CANH) - O30-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 7 junction connector

Result

Result	Proceed to
OK	A
NG (to CAN No. 6 junction connector main bus lines)	B
NG (to CAN No. 7 junction connector main bus lines)	C

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 6 J/C) Click here

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 7 J/C)

REPLACE CAN NO. 3 JUNCTION CONNECTOR

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 6 J/C)

Reconnect the O30 CAN No. 3 junction connector.

Text in Illustration
*a	Front view of wire harness connector (to CAN No. 6 Junction Connector)
*b	to CAN No. 5 Junction Connector
*c	to CAN No. 3 Junction Connector

Disconnect the T24 CAN No. 6 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
T24-9 (CANH) - T24-20 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 5 junction connector
T24-11 (CANH) - T24-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 3 junction connector

Result

Result	Proceed to
OK	A
NG (to CAN No. 5 junction connector main bus lines)	B
NG (to CAN No. 3 junction connector main bus lines)	C

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 5 J/C) Click here

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 6 J/C)

REPLACE CAN NO. 6 JUNCTION CONNECTOR

CHECK FOR OPEN IN SUB BUS 2 MAIN LINES (CAN NO. 5 J/C)

Reconnect the T24 CAN No. 6 junction connector.
Text in Illustration

*a
Rear view of wire harness connector

(to CAN No. 5 Junction Connector)

Disconnect the T16 CAN No. 5 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
T16-3 (CANH) - T16-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 5 J/C - CAN NO. 6 J/C)

REPLACE CAN NO. 5 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINES (NETWORK GATEWAY ECU)

Text in Illustration

*a
Front view of wire harness connector

(to Network Gateway ECU)

Disconnect the I81 network gateway ECU connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
I81-13 (CA2H) - I81-12 (CA2L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 7 J/C) Click here

REPLACE NETWORK GATEWAY ECU Click here

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 7 J/C)

Reconnect the I81 network gateway ECU connector.

Disconnect the I193, I194 and I195 wire harness connectors.

Text in Illustration
*a	Rear view of wire harness connector (to CAN No. 7 Junction Connector)	*b	to CAN No. 8 Junction Connector
*c	to Driving Support ECU Assembly (w/ Pre-collision System)	*d	to CAN No. 3 Junction Connector

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
I193-1 (CANH) - I193-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 3 junction connector
I194-1 (CANH) - I194-2 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Driving support ECU assembly*
I195-1 (CANH) - I195-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 8 junction connector

*: w/ Pre-collision System

Wiring Color

Code

Color

CANH Side

Color

CANL Side

Connected to

I193

CAN No. 3 junction connector

I194

Driving support ECU assembly*

I195

CAN No. 8 junction connector

*: w/ Pre-collision System

Result

Result	Proceed to
OK	A
NG (to CAN No. 8 junction connector main bus lines)	B
NG (to CAN No. 3 junction connector main bus lines)	C
NG (to driving support ECU assembly branch lines)	D

Note

Before disconnecting the connectors, make a note of where they are connected.
Reconnect each connector to its original position.

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 8 J/C) Click here

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 3 J/C) Click here

CHECK FOR SHORT IN SUB BUS 2 LINES (ECU, SENSOR) Click here

REPLACE CAN NO. 7 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 8 J/C)

Reconnect the I193, I194 and I195 wire harness connectors.

Text in Illustration
*a	Front view of wire harness connector (to CAN No. 8 Junction Connector)
*b	to Lane Departure Warning Camera (w/ Pre-collision System)
*c	to CAN No. 7 Junction Connector
*d	to Network Gateway ECU

Disconnect the S22 CAN No. 8 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
S22-1 (CANH) - S22-7 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Lane departure warning camera*
S22-2 (CANH) - S22-8 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 7 junction connector
S22-3 (CANH) - S22-9 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Network gateway ECU

*: w/ Pre-collision System

Result

Result	Proceed to
OK	A
NG (to lane departure warning camera branch lines)	B
NG (to CAN No. 7 junction connector main bus lines)	C
NG (to network gateway ECU main bus lines)	D

CHECK FOR SHORT IN SUB BUS 2 LINES (ECU, SENSOR) Click here

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 7 J/C - CAN NO. 8 J/C)

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 8 J/C - NETWORK GATEWAY ECU)

REPLACE CAN NO. 8 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 3 J/C)

Reconnect the I193, I194 and I195 wire harness connectors.

Text in Illustration
*a	Front view of wire harness connector (to CAN No. 3 Junction Connector)
*b	to Blind Spot Monitor Sensor RH (w/ Blind Spot Monitor System)
*c	to CAN No. 6 Junction Connector
*d	to CAN No. 7 Junction Connector

Disconnect the O30 CAN No. 3 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
O30-9 (CANH) - O30-20 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Blind spot monitor sensor RH*
O30-10 (CANH) - O30-21 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 6 junction connector
O30-11 (CANH) - O30-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 7 junction connector

*: w/ Blind Spot Monitor System

Result

Result	Proceed to
OK	A
NG (to CAN No. 6 junction connector main bus lines)	B
NG (to blind spot monitor sensor RH branch lines)	C
NG (to CAN No. 7 junction connector main bus lines)	D

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 6 J/C) Click here

CHECK FOR SHORT IN SUB BUS 2 LINES (ECU, SENSOR) Click here

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 7 J/C)

REPLACE CAN NO. 3 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 6 J/C)

Reconnect the O30 CAN No. 3 junction connector.

Text in Illustration
*a	Front view of wire harness connector (to CAN No. 6 Junction Connector)
*b	to CAN No. 5 Junction Connector
*c	to CAN No. 3 Junction Connector

Disconnect the T24 CAN No. 6 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
T24-9 (CANH) - T24-20 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 5 junction connector
T24-11 (CANH) - T24-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	CAN No. 3 junction connector

Result

Result	Proceed to
OK	A
NG (to CAN No. 5 junction connector main bus lines)	B
NG (to CAN No. 3 junction connector main bus lines)	C

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 5 J/C) Click here

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 6 J/C)

REPLACE CAN NO. 6 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINES (CAN NO. 5 J/C)

Reconnect the T24 CAN No. 6 junction connector.
Text in Illustration

*a
Rear view of wire harness connector

(to CAN No. 5 Junction Connector)

Disconnect the T16 CAN No. 5 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
T16-3 (CANH) - T16-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN NO. 5 J/C - CAN NO. 6 J/C)

REPLACE CAN NO. 5 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINES (ECU, SENSOR)

Reconnect all wire harness connectors.
Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short-circuited branch line is connected Click here.

Text in Illustration
*a	Component with harness connected (Network Gateway ECU)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
I81-13 (CA2H) - I81-12 (CA2L)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

Tech Tips

If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.
If the resistance does not become normal (between 54 and 69 Ω) when the connector is disconnected from the ECU or sensor, repair or replace the short-circuited branch line or connector.

REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINES OR CONNECTOR

REPLACE CORRESPONDING ECU OR SENSOR

CHECK FOR SHORT IN SUB BUS 2 LINE (NETWORK GATEWAY ECU)

Text in Illustration

*a
Front view of wire harness connector

(to Network Gateway ECU)

Disconnect the I81 network gateway ECU connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
I81-13 (CA2H) - I81-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
I81-12 (CA2L) - I81-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
I81-13 (CA2H) - I81-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
I81-12 (CA2L) - I81-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

Tech Tips

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 7 J/C) Click here

REPLACE NETWORK GATEWAY ECU Click here

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 7 J/C)

Reconnect the I81 network gateway ECU connector.

Disconnect the I193, I194 and I195 wire harness connectors.

Text in Illustration
*1	DLC3	-	-
*a	Rear view of wire harness connector (to CAN No. 7 Junction Connector)	*b	to CAN No. 8 Junction Connector
*c	to Driving Support ECU Assembly (w/ Pre-collision System)	*d	to CAN No. 3 Junction Connector

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
I193-1 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	CAN No. 3 junction connector
I193-2 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	CAN No. 3 junction connector
I194-1 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	Driving support ECU assembly*
I194-2 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	Driving support ECU assembly*
I195-1 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	CAN No. 8 junction connector
I195-2 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	CAN No. 8 junction connector
I193-1 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	CAN No. 3 junction connector
I193-2 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	CAN No. 3 junction connector
I194-1 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Driving support ECU assembly*
I194-2 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Driving support ECU assembly*
I195-1 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	CAN No. 8 junction connector
I195-2 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	CAN No. 8 junction connector

*: w/ Pre-collision System

Wiring Color

Code

Color

CANH Side

Color

CANL Side

Connected to

I193

CAN No. 3 junction connector

I194

Driving support ECU assembly*

I195

CAN No. 8 junction connector

*: w/ Pre-collision System

Result

Result	Proceed to
OK	A
NG (to CAN No. 8 junction connector main bus line)	B
NG (to CAN No. 3 junction connector main bus line)	C
NG (to driving support ECU assembly branch line)	D

Note

Before disconnecting the connectors, make a note of where they are connected.
Reconnect each connector to its original position.

Tech Tips

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 8 J/C) Click here

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 3 J/C) Click here

CHECK FOR SHORT IN SUB BUS 2 LINE (ECU, SENSOR) Click here

REPLACE CAN NO. 7 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 8 J/C)

Reconnect the I193, I194 and I195 wire harness connectors.

Disconnect the S22 CAN No. 8 junction connector.

Text in Illustration
*1	DLC3	-	-
*a	Front view of wire harness connector (to CAN No. 8 Junction Connector)	*b	to Lane Departure Warning Camera (w/ Pre-collision System)
*c	to CAN No. 7 Junction Connector	*d	to Network Gateway ECU

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
S22-1 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	Lane departure warning camera*
S22-7 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	Lane departure warning camera*
S22-2 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	CAN No. 7 junction connector
S22-8 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	CAN No. 7 junction connector
S22-3 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	Network gateway ECU
S22-9 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	Network gateway ECU
S22-1 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Lane departure warning camera*
S22-7 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Lane departure warning camera*
S22-2 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	CAN No. 7 junction connector
S22-8 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	CAN No. 7 junction connector
S22-3 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Network gateway ECU
S22-9 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Network gateway ECU

*: w/ Pre-collision System

Result

Result	Proceed to
OK	A
NG (to lane departure warning camera branch line)	B
NG (to CAN No. 7 junction connector main bus line)	C
NG (to network gateway ECU main bus line)	D

Tech Tips

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

CHECK FOR SHORT IN SUB BUS 2 LINE (ECU, SENSOR) Click here

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 7 J/C - CAN NO. 8 J/C)

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 8 J/C - NETWORK GATEWAY ECU)

REPLACE CAN NO. 8 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 3 J/C)

Reconnect the I193, I194 and I195 wire harness connectors.

Disconnect the O30 CAN No. 3 junction connector.

Text in Illustration
*1	DLC3	-	-
*a	Front view of wire harness connector (to CAN No. 3 Junction Connector)	*b	to Blind Spot Monitor Sensor RH (w/ Blind Spot Monitor System)
*c	to CAN No. 6 Junction Connector	*d	to CAN No. 7 Junction Connector

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
O30-9 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	Blind spot monitor sensor RH*
O30-20 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	Blind spot monitor sensor RH*
O30-10 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	CAN No. 6 junction connector
O30-21 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	CAN No. 6 junction connector
O30-11 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	CAN No. 7 junction connector
O30-22 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	CAN No. 7 junction connector
O30-9 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	Blind spot monitor sensor RH*
O30-20 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	Blind spot monitor sensor RH*
O30-10 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	CAN No. 6 junction connector
O30-21 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	CAN No. 6 junction connector
O30-11 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	CAN No. 7 junction connector
O30-22 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	CAN No. 7 junction connector

*: w/ Blind Spot Monitor System

Result

Result	Proceed to
OK	A
NG (to CAN No. 6 junction connector main bus line)	B
NG (to CAN No. 7 junction connector main bus line)	C
NG (to blind spot monitor sensor RH branch line)	D

Tech Tips

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 6 J/C) Click here

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 7 J/C)

CHECK FOR SHORT IN SUB BUS 2 LINE (ECU, SENSOR) Click here

REPLACE CAN NO. 3 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 6 J/C)

Reconnect the O30 CAN No. 3 junction connector.

Disconnect the T24 CAN No. 6 junction connector.

Text in Illustration
*1	DLC3	-	-
*a	Front view of wire harness connector (to CAN No. 6 Junction Connector)	*b	to CAN No. 5 Junction Connector
*c	to CAN No. 3 Junction Connector	-	-

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
T24-9 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	CAN No. 5 junction connector
T24-20 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	CAN No. 5 junction connector
T24-11 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short	CAN No. 3 junction connector
T24-22 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short	CAN No. 3 junction connector
T24-9 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	CAN No. 5 junction connector
T24-20 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	CAN No. 5 junction connector
T24-11 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short	CAN No. 3 junction connector
T24-22 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short	CAN No. 3 junction connector

Result

Result	Proceed to
OK	A
NG (to CAN No. 5 junction connector main bus line)	B
NG (to CAN No. 3 junction connector main bus line)	C

Tech Tips

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 5 J/C) Click here

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 3 J/C - CAN NO. 6 J/C)

REPLACE CAN NO. 6 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINE (CAN NO. 5 J/C)

Reconnect the T24 CAN No. 6 junction connector.

Text in Illustration
*1	DLC3
*a	Front view of wire harness connector (to CAN No. 5 Junction Connector)

Disconnect the T16 CAN No. 5 junction connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
T16-3 (CANH) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
T16-2 (CANL) - I39-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
T16-3 (CANH) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
T16-2 (CANL) - I39-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

Tech Tips

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 5 J/C - CAN NO. 6 J/C)

REPLACE CAN NO. 5 JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 2 LINE (ECU, SENSOR)

Reconnect all wire harness connectors.
Disconnect the connector that includes terminals CANH and CANL from the ECU to which the bus line shorted to B+ or shorted to GND is connected Click here.

Text in Illustration
*a	Component with harness connected (Network Gateway ECU)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
I81-13 (CA2H) - I81-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
I81-12 (CA2L) - I81-4 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
I81-13 (CA2H) - I81-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
I81-12 (CA2L) - I81-2 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

Tech Tips

It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 2 inspection.

REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BRANCH LINE OR CONNECTOR

REPLACE CORRESPONDING ECU OR SENSOR