CAN COMMUNICATION SYSTEM(w/ Central Gateway ECU), Diagnostic DTC:U0100, U0129, U0293

DTC Code	DTC Name
U0100	Lost Communication with ECM / PCM "A"
U0129	Lost Communication with Brake System Control Module
U0293	Lost Communication with Hybrid Vehicle Control System

DESCRIPTION

The hybrid vehicle control ECU communicates with the ECM and brake booster with master cylinder assembly (skid control ECU). When the hybrid vehicle control ECU does not receive data from the ECM or brake booster with master cylinder assembly (skid control ECU), the hybrid vehicle control ECU stores DTC U0100 or U0129.
The ECM communicates with the hybrid vehicle control ECU. When the ECM does not receive data from the hybrid vehicle control ECU, the ECM stores DTC U0293.
The brake booster with master cylinder assembly (skid control ECU) communicates with the hybrid vehicle control ECU. When the brake booster with master cylinder assembly (skid control ECU) does not receive data from the hybrid vehicle control ECU, the brake booster with master cylinder assembly (skid control ECU) stores DTC U0293.

DTC No.	DTC Detection Condition	Trouble Area
U0100	The hybrid vehicle control ECU does not receive data from the ECM.	Open or short in sub bus 15 main line or connector Open or short in sub bus 15 branch line or connector Power source circuit of hybrid vehicle control ECU Hybrid vehicle control ECU Power source circuit of ECM ECM Open or short in No. 1 CAN junction connector Open or short in No. 5 CAN junction connector
U0129	The hybrid vehicle control ECU does not receive data from the brake booster with master cylinder assembly (skid control ECU).	Open or short in sub bus 15 main line or connector Open or short in sub bus 15 branch line or connector Power source circuit of ECM ECM Power source circuit of hybrid vehicle control ECU Hybrid vehicle control ECU Power source circuit of brake booster with master cylinder assembly (skid control ECU) Brake booster with master cylinder assembly (skid control ECU) Open or short in No. 1 CAN junction connector Open or short in No. 5 CAN junction connector
U0293	The ECM does not receive data from the hybrid vehicle control ECU. The brake booster with master cylinder assembly (skid control ECU) does not receive data from the hybrid vehicle control ECU.	Open or short in sub bus 15 main line or connector Open or short in sub bus 15 branch line or connector Power source circuit of ECM ECM Power source circuit of brake booster with master cylinder assembly (skid control ECU) Brake booster with master cylinder assembly (skid control ECU) Open or short in No. 1 CAN junction connector Open or short in No. 5 CAN junction connector

Tech Tips

This diagnostic procedure is for when DTC U0100, U0129 and U0293 are output at the same time.

WIRING DIAGRAM


*a	Brake Booster with Master Cylinder Assembly (Skid Control ECU)
*b	No. 1 CAN Junction Connector
*c	Hybrid Vehicle Control ECU
*d	No. 5 CAN Junction Connector

CAUTION / NOTICE / HINT

Note

Before measuring the resistance of the CAN bus, turn the power 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 (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary 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 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

Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

RECONFIRM DTC OUTPUT

Reconfirm DTCs.

Tech Tips

If the hybrid vehicle control ECU outputs only DTC U0129, troubleshoot DTC U0129 and check the branch circuit of sub bus 15.

Result

Proceed to

The hybrid vehicle control ECU outputs DTC U0129 and other DTCs.

(GTS display: Hybrid Control)

The hybrid vehicle control ECU outputs only DTC U0129.

(GTS display: Hybrid Control)

GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here

CHECK SUB BUS 15

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

Text in Illustration
*a	Component with harness connected (Hybrid Vehicle Control ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
L6-31 (CA3P) - L6-30 (CA3N)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω	Below 54 Ω: Short circuit between bus lines
L6-31 (CA3P) - L6-30 (CA3N)		54 to 69 Ω	70 Ω or higher: Open circuit in main bus lines
L6-31 (CA3P) - L6-4 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
L6-30 (CA3N) - L6-4 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
L6-31 (CA3P) - L6-3 (BATT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
L6-30 (CA3N) - L6-3 (BATT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

Tech Tips

When the value is as specified, clear and recheck for DTCs. When no DTCs are output, check for malfunctions such as damage or improper connection of the relevant connectors.
If DTCs are output although the bus circuit is normal and DTCs were cleared, replace the hybrid vehicle control ECU.

Result

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

REPLACE HYBRID VEHICLE CONTROL ECU Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (HYBRID VEHICLE CONTROL ECU) Click here

CHECK FOR SHORT IN SUB BUS 15 LINE (HYBRID VEHICLE CONTROL ECU) Click here

CHECK FOR OPEN IN SUB BUS 15 LINES (HYBRID VEHICLE CONTROL ECU)

Text in Illustration

*a
Rear view of wire harness connector

(to Hybrid Vehicle Control ECU)

Disconnect the L6 hybrid vehicle control ECU connector.

Text in Illustration
*a	Rear view of wire harness connector (to Hybrid Vehicle Control ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
L6-31 (CA3P) - L6-30 (CA3N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE HYBRID VEHICLE CONTROL ECU Click here

CHECK FOR OPEN IN SUB BUS 15 LINES (NO. 5 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR)

Reconnect the L6 hybrid vehicle control ECU connector.
Disconnect the L101 wire harness connector from the No. 5 CAN junction connector (instrument panel connector holder left side).

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

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

Standard Resistance

Tester Connection	Condition	Specified Condition
L101-2 (CANH) - L101-4 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

CHECK FOR OPEN IN SUB BUS 15 LINES (NO. 1 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR) Click here

CHECK FOR OPEN IN SUB BUS 15 LINES (NO. 5 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

Reconnect the L101 wire harness connector to the No. 5 CAN junction connector (instrument panel connector holder left side).
Disconnect the L102 wire harness connector from the No. 5 CAN junction connector (instrument panel connector holder right side).

Text in Illustration
*a	Front view of wire harness connector (to No. 5 CAN Junction Connector)
*b	to Hybrid Vehicle Control ECU

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

Standard Resistance

Tester Connection	Condition	Specified Condition
L102-5 (CANH) - L102-3 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE NO. 5 CAN JUNCTION CONNECTOR

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

CHECK FOR OPEN IN SUB BUS 15 LINES (NO. 1 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

Reconnect the L101 wire harness connector to the No. 5 CAN junction connector (instrument panel connector holder left side).
Disconnect the L132 wire harness connector from the No. 1 CAN junction connector (instrument panel wire side).

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

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

Standard Resistance

Tester Connection	Condition	Specified Condition
L132-3 (CANH) - L132-9 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

CHECK FOR OPEN IN SUB BUS 15 LINES (NO. 1 CAN JUNCTION CONNECTOR - ECM)

Reconnect the L132 wire harness connector to the No. 1 CAN junction connector (instrument panel wire side).
Disconnect the A67 wire harness connector from the No. 1 CAN junction connector (engine room main wire side).

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

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A67-4 (CANH) - A67-10 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE NO. 1 CAN JUNCTION CONNECTOR

CHECK FOR OPEN IN SUB BUS 15 LINES (ECM)

Reconnect the A67 wire harness connector to the No. 1 CAN junction connector (engine room main wire side).
Text in Illustration

*a
Front view of wire harness connector

(to ECM)

Disconnect the A57 ECM connector.

Text in Illustration
*a	Front view of wire harness connector (to ECM)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A57-12 (CANP) - A57-4 (CANN)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE ECM Click here

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - ECM)

CHECK FOR SHORT IN SUB BUS 15 LINES (HYBRID VEHICLE CONTROL ECU)

Text in Illustration

*a
Rear view of wire harness connector

(to Hybrid Vehicle Control ECU)

Disconnect the L6 hybrid vehicle control ECU connector.

Text in Illustration
*a	Rear view of wire harness connector (to Hybrid Vehicle Control ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
L6-31 (CA3P) - L6-30 (CA3N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE HYBRID VEHICLE CONTROL ECU Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (NO. 5 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

Reconnect the L6 hybrid vehicle control ECU connector.
Disconnect the L102 wire harness connector from the No. 5 CAN junction connector (instrument panel connector holder right side).

Text in Illustration
*a	Front view of wire harness connector (to No. 5 CAN Junction Connector)
*b	to Hybrid Vehicle Control ECU

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

Standard Resistance

Tester Connection	Condition	Specified Condition
L102-5 (CANH) - L102-3 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

CHECK FOR SHORT IN SUB BUS 15 LINES (NO. 5 CAN JUNCTION CONNECTOR)

Disconnect the L101 wire harness connector from the No. 5 CAN junction connector (instrument panel connector holder left side).

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

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

Standard Resistance

Tester Connection	Condition	Specified Condition
L101-2 (CANH) - L101-4 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE NO. 5 CAN JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 15 LINES (NO. 1 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

Disconnect the L132 wire harness connector from the No. 1 CAN junction connector (instrument panel wire side).

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

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

Standard Resistance

Tester Connection	Condition	Specified Condition
L132-3 (CANH) - L132-9 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINES (NO. 1 CAN JUNCTION CONNECTOR)

Disconnect the A67 wire harness connector from the No. 1 CAN junction connector (engine room main wire side).

Text in Illustration
*a	Front view of wire harness connector (to No. 1 CAN Junction Connector)
*b	to Brake booster with master cylinder assembly (Skid control ECU)
*c	to ECM

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A67-3 (CANH) - A67-9 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A67-4 (CANH) - A67-10 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result	Proceed to
OK	A
NG (ECM CAN main bus lines)	B
NG (Brake booster with master cylinder assembly (skid control ECU) CAN branch lines)	C

REPLACE NO. 1 CAN JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 15 LINES (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SKID CONTROL ECU) Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (ECM)

Text in Illustration

*a
Front view of wire harness connector

(to ECM)

Disconnect the A57 ECM connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A57-12 (CANP) - A57-4 (CANN)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

REPLACE ECM Click here

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - ECM)

CHECK FOR SHORT IN SUB BUS 15 LINES (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SKID CONTROL ECU)

Disconnect the A58 brake booster with master cylinder assembly (skid control ECU) connector.

Text in Illustration
*a	Front view of wire harness connector (to Brake Booster with Master Cylinder Assembly (Skid Control ECU))

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A58-35 (CA2H) - A58-34 (CA2L)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

Result

Result	Proceed to
OK (for LHD)	A
OK (for RHD)	B
NG	C

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SKID CONTROL ECU) Click here

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SKID CONTROL ECU))

CHECK FOR SHORT IN SUB BUS 15 LINE (HYBRID VEHICLE CONTROL ECU)

Disconnect the L6 hybrid vehicle control ECU connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
L6-31 (CA3P) - L61-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANH ground short
L6-30 (CA3N) - L61-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANL ground short
L6-31 (CA3P) - L61-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANH +B short
L6-30 (CA3N) - L61-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANL +B short

Text in Illustration
*1	DLC3	-	-
*a	Rear view of wire harness connector (to Hybrid Vehicle Control ECU)	-	-

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 15 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

REPLACE HYBRID VEHICLE CONTROL ECU Click here

CHECK FOR SHORT IN SUB BUS 15 LINE (NO. 5 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

Disconnect the L102 wire harness connector from the No. 5 CAN junction connector (instrument panel connector holder right side).

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
L102-5 (CANH) - L61-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANH ground short
L102-3 (CANL) - L61-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANL ground short
L102-5 (CANH) - L61-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANH +B short
L102-3 (CANL) - L61-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANL +B short

Text in Illustration
*1	DLC3	-	-
*a	Front view of wire harness connector (to No. 5 CAN Junction Connector)	*b	to Hybrid vehicle control ECU

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 15 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

CHECK FOR SHORT IN SUB BUS 15 LINE (NO. 5 CAN JUNCTION CONNECTOR)

Disconnect the L101 wire harness connector from the No. 5 CAN junction connector (instrument panel connector holder left side).

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
L101-2 (CANH) - L61-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANH ground short
L101-4 (CANL) - L61-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANL ground short
L101-2 (CANH) - L61-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANH +B short
L101-4 (CANL) - L61-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANL +B short

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

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 15 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

REPLACE NO. 5 CAN JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 15 LINE (NO. 1 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

Disconnect the L132 wire harness connector from the No. 1 CAN junction connector (instrument panel wire side).

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
L132-3 (CANH) - L61-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANH ground short
L132-9 (CANL) - L61-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANL ground short
L132-3 (CANH) - L61-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANH +B short
L132-9 (CANL) - L61-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for 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 15 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

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

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINE (NO. 1 CAN JUNCTION CONNECTOR)

Disconnect the A67 wire harness connector from the No. 1 CAN junction connector (engine room main wire side).

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result	Connected to
A67-3 (CANH) - L61-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANH ground short	Brake booster with master cylinder assembly (skid control ECU)
A67-9 (CANL) - L61-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANL ground short
A67-4 (CANH) - L61-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANH ground short	ECM
A67-10 (CANL) - L61-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANL ground short	ECM
A67-3 (CANH) - L61-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANH +B short	Brake booster with master cylinder assembly (skid control ECU)
A67-9 (CANL) - L61-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANL +B short
A67-4 (CANH) - L61-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANH +B short	ECM
A67-10 (CANL) - L61-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANL +B short	ECM

Text in Illustration
*1	DLC3	-	-
*a	Front view of wire harness connector (to No. 1 CAN Junction Connector)	*b	to Brake booster with master cylinder assembly (Skid control ECU)
*c	to ECM	-	-

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 15 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

REPLACE NO. 1 CAN JUNCTION CONNECTOR

CHECK SUB BUS 15 LINE (ECU OR SENSOR)

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

Text in Illustration
*a	Component with harness connected (Hybrid Vehicle Control ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
L6-31 (CA3P) - L6-4 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
L6-30 (CA3N) - L6-4 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
L6-31 (CA3P) - L6-3 (BATT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
L6-30 (CA3N) - L6-3 (BATT)	Cable disconnected from negative (-) auxiliary 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 15 inspection.
Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

REPLACE CORRESPONDING ECU OR SENSOR

REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR