CAN COMMUNICATION SYSTEM, 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 power management control ECU communicates with the ECM and skid control ECU assembly. When the power management control ECU does not receive data from the ECM or skid control ECU assembly, the power management control ECU stores DTC U0100 or U0129.
The ECM communicates with the power management control ECU. When the ECM does not receive data from the power management control ECU, the ECM stores DTC U0293.
The skid control ECU assembly communicates with the power management control ECU. When the skid control ECU assembly does not receive data from the power management control ECU, the skid control ECU assembly stores DTC U0293.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
U0100	Lost Communication with ECM / PCM "A"	The power management 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 power management control ECU Power management control ECU Power source circuit of ECM ECM Open or short in No. 8 CAN junction connector (for LHD) Open or short in No. 7 CAN junction connector (for RHD)	Tech Tips As there is no sub bus monitor ECU for sub bus 15, each ECU detects communication stops and stores DTCs.
U0129	Lost Communication with Brake System Control Module	The power management control ECU does not receive data from the skid control ECU assembly.	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 power management control ECU Power management control ECU Power source circuit of skid control ECU assembly Skid control ECU assembly Open or short in No. 8 CAN junction connector (for LHD) Open or short in No. 7 CAN junction connector (for RHD)	Tech Tips As there is no sub bus monitor ECU for sub bus 15, each ECU detects communication stops and stores DTCs.
U0293	Lost Communication with Hybrid Vehicle Control System	The ECM does not receive data from the power management control ECU. The skid control ECU assembly does not receive data from the power management 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 power management control ECU Power management control ECU Power source circuit of skid control ECU assembly Skid control ECU assembly Open or short in No. 8 CAN junction connector (for LHD) Open or short in No. 7 CAN junction connector (for RHD)	Tech Tips As there is no sub bus monitor ECU for sub bus 15, each ECU detects communication stops and stores DTCs.

Tech Tips

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

WIRING DIAGRAM

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, 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.

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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.

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After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed.

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Tech Tips

Operating the power 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
for LHD	A
for RHD	B

RECONFIRM DTC OUTPUT Click here

RECONFIRM DTC OUTPUT

Reconfirm DTCs.

Powertrain > Hybrid Control > Trouble Codes

Tech Tips

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

Result

Proceed to

The power management control ECU outputs DTC U0129 and other DTCs.

(GTS display: Hybrid Control)

The power management 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.

*a	Component with harness connected (Power Management Control ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
K33-31 (CA3P) - K33-30 (CA3N)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω	Below 54 Ω: Short circuit between bus lines
K33-31 (CA3P) - K33-30 (CA3N)		54 to 69 Ω	70 Ω or higher: Open circuit in a main bus line
K33-31 (CA3P) - K33-4 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
K33-30 (CA3N) - K33-4 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
K33-31 (CA3P) - K33-7 (AM21)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
K33-30 (CA3N) - K33-7 (AM21)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

Tech Tips

When the values are 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 power management control ECU.

Result

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

REPLACE POWER MANAGEMENT CONTROL ECU Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (POWER MANAGEMENT CONTROL ECU) Click here

CHECK FOR SHORT IN SUB BUS 15 LINE (NO. 8 CAN JUNCTION CONNECTOR) Click here

CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (POWER MANAGEMENT CONTROL ECU)

Disconnect the K33 power management control ECU connector.

*a	Front view of wire harness connector (to Power Management Control ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
K33-31 (CA3P) - K33-30 (CA3N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result
OK
NG

REPLACE POWER MANAGEMENT CONTROL ECU Click here

CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (NO. 8 CAN JUNCTION CONNECTOR) Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (POWER MANAGEMENT CONTROL ECU)

Disconnect the K33 power management control ECU connector.

*a	Front view of wire harness connector (to Power Management Control ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
K33-31 (CA3P) - K33-30 (CA3N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result
OK
NG

REPLACE POWER MANAGEMENT CONTROL ECU Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (NO. 8 CAN JUNCTION CONNECTOR) Click here

CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (NO. 8 CAN JUNCTION CONNECTOR)

Reconnect the K33 power management control ECU connector.
Disconnect the K116 No. 8 CAN junction connector.

Front view of wire harness connector

(to No. 8 CAN Junction Connector)

to Power Management Control ECU

to ECM

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
K116-9 (CANH) - K116-20 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	Power management control ECU
K116-11 (CANH) - K116-22 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	ECM

Result

Result	Proceed to
OK	A
NG (Open circuit in power management control ECU CAN main bus line)	B
NG (Open circuit in ECM CAN main bus line)	C

REPLACE NO. 8 CAN JUNCTION CONNECTOR

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - NO. 8 CAN JUNCTION CONNECTOR)

CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (ECM - NO. 8 CAN JUNCTION CONNECTOR) Click here

CHECK FOR SHORT IN SUB BUS 15 LINE (NO. 8 CAN JUNCTION CONNECTOR)

Disconnect the K116 No. 8 CAN junction connector.

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

DLC3

Front view of wire harness connector

(to No. 8 CAN Junction Connector)

to Power Management Control ECU

to Skid Control ECU Assembly

to ECM

Standard Resistance

Tester Connection	Condition	Specified Condition	Purpose	Connected to
K116-9 (CANH) - K9-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANH ground short	Power management control ECU
K116-20 (CANL) - K9-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANL ground short	Power management control ECU
K116-10 (CANH) - K9-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANH ground short	Skid control ECU assembly
K116-21 (CANL) - K9-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANL ground short	Skid control ECU assembly
K116-11 (CANH) - K9-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANH ground short	ECM
K116-22 (CANL) - K9-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANL ground short	ECM
K116-9 (CANH) - K9-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANH +B short	Power management control ECU
K116-20 (CANL) - K9-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANL +B short	Power management control ECU
K116-10 (CANH) - K9-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANH +B short	Skid control ECU assembly
K116-21 (CANL) - K9-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANL +B short	Skid control ECU assembly
K116-11 (CANH) - K9-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANH +B short	ECM
K116-22 (CANL) - K9-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANL +B short	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 Purpose column that matches the result in the Result column from the Check Sub Bus 15 inspection.

Result

Result	Proceed to
OK	A
NG (Ground short in power management control ECU CAN main bus line) NG (+B short in power management control ECU CAN main bus line)	B
NG (Ground short in ECM CAN main bus line) NG (+B short in ECM CAN main bus line)	C
NG (Ground short in skid control ECU assembly CAN branch line) NG (+B short in Skid control ECU assembly CAN branch line)	D

REPLACE NO. 8 CAN JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 15 LINE (POWER MANAGEMENT CONTROL ECU - NO. 8 CAN JUNCTION CONNECTOR) Click here

CHECK FOR SHORT IN SUB BUS 15 LINE (ECM - NO. 8 CAN JUNCTION CONNECTOR) Click here

CHECK FOR SHORT IN SUB BUS 15 LINE (SKID CONTROL ECU ASSEMBLY - NO. 8 CAN JUNCTION CONNECTOR) Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (NO. 8 CAN JUNCTION CONNECTOR)

Reconnect the K33 power management control ECU connector.
Disconnect the K116 No. 8 CAN junction connector.

*a	Front view of wire harness connector (to No. 8 CAN Junction Connector)
*b	to Power Management Control ECU
*c	to Skid Control ECU Assembly
*d	to ECM

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
K116-9 (CANH) - K116-20 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	Power management control ECU
K116-10 (CANH) - K116-21 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Skid control ECU assembly
K116-11 (CANH) - K116-22 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	ECM

Result

Result	Proceed to
OK	A
NG (Short circuit between bus lines in power management control ECU CAN main bus line)	B
NG (Short circuit between bus lines in ECM CAN main bus line)	C
NG (Short circuit between bus lines in skid control ECU assembly CAN branch line)	D

REPLACE NO. 8 CAN JUNCTION CONNECTOR

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - NO. 8 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINES (ECM - NO. 8 CAN JUNCTION CONNECTOR) Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (SKID CONTROL ECU ASSEMBLY - NO. 8 CAN JUNCTION CONNECTOR) Click here

CHECK FOR SHORT IN SUB BUS 15 LINE (POWER MANAGEMENT CONTROL ECU - NO. 8 CAN JUNCTION CONNECTOR)

Disconnect the K33 power management control ECU connector.

*a	Front view of wire harness connector (to Power Management Control ECU)

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

Standard Resistance

Tester Connection	Condition	Purpose	Specified Condition
K33-31 (CA3P) - K33-4 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANH ground short	200 Ω or higher
K33-30 (CA3N) - K33-4 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANL ground short	200 Ω or higher
K33-31 (CA3P) - K33-7 (AM21)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANH +B short	6 kΩ or higher
K33-30 (CA3N) - K33-7 (AM21)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANL +B short	6 kΩ or higher

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

Result

Result
OK
NG

REPLACE POWER MANAGEMENT CONTROL ECU Click here

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - NO. 8 CAN JUNCTION CONNECTOR)

CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (ECM - NO. 8 CAN JUNCTION CONNECTOR)

Reconnect the K116 No. 8 CAN junction connector.
Disconnect the F5 ECM connector.

*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
F5-61 (CAN+) - F5-62 (CAN-)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result
OK
NG

REPLACE ECM Click here

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - NO. 8 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINES (ECM - NO. 8 CAN JUNCTION CONNECTOR)

Reconnect the K116 No. 8 CAN junction connector.
Disconnect the F5 ECM connector.

*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
F5-61 (CAN+) - F5-62 (CAN-)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result
OK
NG

REPLACE ECM Click here

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - NO. 8 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINE (ECM - NO. 8 CAN JUNCTION CONNECTOR)

Disconnect the A78 and F5 ECM connectors.

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

Front view of wire harness connector

(to ECM)

Standard Resistance

Tester Connection	Condition	Purpose	Specified Condition
F5-61 (CAN+) - F5-16 (E1)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANH ground short	200 Ω or higher
F5-62 (CAN-) - F5-16 (E1)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANL ground short	200 Ω or higher
F5-61 (CAN+) - A78-1 (BATT)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANH +B short	6 kΩ or higher
F5-62 (CAN-) - A78-1 (BATT)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANL +B short	6 kΩ or higher

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

Result

Result
OK
NG

REPLACE ECM Click here

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - NO. 8 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINES (SKID CONTROL ECU ASSEMBLY - NO. 8 CAN JUNCTION CONNECTOR)

Reconnect the K116 No. 8 CAN junction connector.
Disconnect the A25 skid control ECU assembly connector.

*a	Front view of wire harness connector (to Skid Control ECU Assembly)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A25-9 (CANH) - A25-8 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

Result

Result
OK
NG

REPLACE SKID CONTROL ECU ASSEMBLY Click here

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (SKID CONTROL ECU ASSEMBLY - NO. 8 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINE (SKID CONTROL ECU ASSEMBLY - NO. 8 CAN JUNCTION CONNECTOR)

Disconnect the A25 skid control ECU assembly connector.

*a	Front view of wire harness connector (to Skid Control ECU Assembly)

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

Standard Resistance

Tester Connection	Condition	Purpose	Specified Condition
A25-9 (CANH) - A25-1 (GND4)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANH ground short	200 Ω or higher
A25-8 (CANL) - A25-1 (GND4)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANL ground short	200 Ω or higher
A25-9 (CANH) - A25-38 (+BI2)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANH +B short	6 kΩ or higher
A25-8 (CANL) - A25-38 (+BI2)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANL +B short	6 kΩ or higher

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

Result

Result
OK
NG

REPLACE SKID CONTROL ECU ASSEMBLY Click here

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (SKID CONTROL ECU ASSEMBLY - NO. 8 CAN JUNCTION CONNECTOR)

RECONFIRM DTC OUTPUT

Reconfirm DTCs.

Powertrain > Hybrid Control > Trouble Codes

Tech Tips

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

Result

Proceed to

The power management control ECU outputs DTC U0129 and other DTCs.

(GTS display: Hybrid Control)

The power management 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.

*a	Component with harness connected (Power Management Control ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
K33-31 (CA3P) - K33-30 (CA3N)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω	Below 54 Ω: Short circuit between bus lines
K33-31 (CA3P) - K33-30 (CA3N)		54 to 69 Ω	70 Ω or higher: Open circuit in a main bus line
K33-31 (CA3P) - K33-4 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Below 200 Ω: CANH ground short
K33-30 (CA3N) - K33-4 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Below 200 Ω: CANL ground short
K33-31 (CA3P) - K33-7 (AM21)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Below 6 kΩ: CANH +B short
K33-30 (CA3N) - K33-7 (AM21)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Below 6 kΩ: CANL +B short

Tech Tips

When the values are 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 power management control ECU.

Result

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

REPLACE POWER MANAGEMENT CONTROL ECU Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (POWER MANAGEMENT CONTROL ECU) Click here

CHECK FOR SHORT IN SUB BUS 15 LINE (NO. 7 CAN JUNCTION CONNECTOR) Click here

CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (POWER MANAGEMENT CONTROL ECU)

Disconnect the K33 power management control ECU connector.

*a	Front view of wire harness connector (to Power Management Control ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
K33-31 (CA3P) - K33-30 (CA3N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result
OK
NG

REPLACE POWER MANAGEMENT CONTROL ECU Click here

CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (NO. 7 CAN JUNCTION CONNECTOR) Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (POWER MANAGEMENT CONTROL ECU)

Disconnect the K33 power management control ECU connector.

*a	Front view of wire harness connector (to Power Management Control ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
K33-31 (CA3P) - K33-30 (CA3N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result
OK
NG

REPLACE POWER MANAGEMENT CONTROL ECU Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (NO. 7 CAN JUNCTION CONNECTOR) Click here

CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (NO. 7 CAN JUNCTION CONNECTOR)

Reconnect the K33 power management control ECU connector.
Disconnect the K115 No. 7 CAN junction connector.

Front view of wire harness connector

(to No. 7 CAN Junction Connector)

to Power Management Control ECU

to ECM

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
K115-9 (CANH) - K115-20 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	Power management control ECU
K115-11 (CANH) - K115-22 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	ECM

Result

Result	Proceed to
OK	A
NG (Open circuit in power management control ECU CAN main bus line)	B
NG (Open circuit in ECM CAN main bus line)	C

REPLACE NO. 7 CAN JUNCTION CONNECTOR

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - NO. 7 CAN JUNCTION CONNECTOR)

CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (ECM - NO. 7 CAN JUNCTION CONNECTOR) Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (NO. 7 CAN JUNCTION CONNECTOR)

Reconnect the K33 power management control ECU connector.
Disconnect the K115 No. 7 CAN junction connector.

*a	Front view of wire harness connector (to No. 7 CAN Junction Connector)
*b	to Power Management Control ECU
*c	to Skid Control ECU Assembly
*d	to ECM

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
K115-9 (CANH) - K115-20 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	Power management control ECU
K115-10 (CANH) - K115-21 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Skid control ECU assembly
K115-11 (CANH) - K115-22 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	ECM

Result

Result	Proceed to
OK	A
NG (Short circuit between bus lines in power management control ECU CAN main bus line)	B
NG (Short circuit between bus lines in ECM CAN main bus line)	C
NG (Short circuit between bus lines in skid control ECU assembly CAN branch line)	D

REPLACE NO. 7 CAN JUNCTION CONNECTOR

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - NO. 7 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINES (ECM - NO. 7 CAN JUNCTION CONNECTOR) Click here

CHECK FOR SHORT IN SUB BUS 15 LINES (SKID CONTROL ECU ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR) Click here

CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (ECM - NO. 7 CAN JUNCTION CONNECTOR)

Reconnect the K115 No. 7 CAN junction connector.
Disconnect the F5 ECM connector.

*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
F5-61 (CAN+) - F5-62 (CAN-)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result
OK
NG

REPLACE ECM Click here

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - NO. 7 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINES (ECM - NO. 7 CAN JUNCTION CONNECTOR)

Reconnect the K115 No. 7 CAN junction connector.
Disconnect the F5 ECM connector.

*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
F5-61 (CAN+) - F5-62 (CAN-)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result
OK
NG

REPLACE ECM Click here

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - NO. 7 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINES (SKID CONTROL ECU ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR)

Reconnect the K115 No. 7 CAN junction connector.
Disconnect the A25 skid control ECU assembly connector.

*a	Front view of wire harness connector (to Skid Control ECU Assembly)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A25-9 (CANH) - A25-8 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

Result

Result
OK
NG

REPLACE SKID CONTROL ECU ASSEMBLY Click here

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (SKID CONTROL ECU ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINE (NO. 7 CAN JUNCTION CONNECTOR)

Disconnect the K115 No. 7 CAN junction connector.

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

DLC3

Front view of wire harness connector

(to No. 7 CAN Junction Connector)

to Power Management Control ECU

to Skid Control ECU Assembly

to ECM

Standard Resistance

Tester Connection	Condition	Specified Condition	Purpose	Connected to
K115-9 (CANH) - K9-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANH ground short	Power management control ECU
K115-20 (CANL) - K9-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANL ground short	Power management control ECU
K115-10 (CANH) - K9-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANH ground short	Skid control ECU assembly
K115-21 (CANL) - K9-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANL ground short	Skid control ECU assembly
K115-11 (CANH) - K9-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANH ground short	ECM
K115-22 (CANL) - K9-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inspection for CANL ground short	ECM
K115-9 (CANH) - K9-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANH +B short	Power management control ECU
K115-20 (CANL) - K9-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANL +B short	Power management control ECU
K115-10 (CANH) - K9-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANH +B short	Skid control ECU assembly
K115-21 (CANL) - K9-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANL +B short	Skid control ECU assembly
K115-11 (CANH) - K9-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANH +B short	ECM
K115-22 (CANL) - K9-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Inspection for CANL +B short	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 Purpose column that matches the result in the Result column from the Check Sub Bus 15 inspection.

Result

Result	Proceed to
OK	A
NG (Ground short in power management control ECU CAN main bus line) NG (+B short in power management control ECU CAN main bus line)	B
NG (Ground short in ECM CAN main bus line) NG (+B short in ECM CAN main bus line)	C
NG (Ground short in skid control ECU assembly CAN branch line) NG (+B short in skid control ECU assembly CAN branch line)	D

REPLACE NO. 7 CAN JUNCTION CONNECTOR

CHECK FOR SHORT IN SUB BUS 15 LINE (ECM - NO. 7 CAN JUNCTION CONNECTOR) Click here

CHECK FOR SHORT IN SUB BUS 15 LINE (SKID CONTROL ECU ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR) Click here

CHECK FOR SHORT IN SUB BUS 15 LINE (POWER MANAGEMENT CONTROL ECU - NO. 7 CAN JUNCTION CONNECTOR)

Disconnect the K33 power management control ECU connector.

*a	Front view of wire harness connector (to Power Management Control ECU)

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

Standard Resistance

Tester Connection	Condition	Purpose	Specified Condition
K33-31 (CA3P) - K33-4 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANH ground short	200 Ω or higher
K33-30 (CA3N) - K33-4 (E12)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANL ground short	200 Ω or higher
K33-31 (CA3P) - K33-7 (AM21)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANH +B short	6 kΩ or higher
K33-30 (CA3N) - K33-7 (AM21)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANL +B short	6 kΩ or higher

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

Result

Result
OK
NG

REPLACE POWER MANAGEMENT CONTROL ECU Click here

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - NO. 7 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINE (ECM - NO. 7 CAN JUNCTION CONNECTOR)

Disconnect the A78 and F5 ECM connectors.

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

Front view of wire harness connector

(to ECM)

Standard Resistance

Tester Connection	Condition	Purpose	Specified Condition
F5-61 (CAN+) - F5-16 (E1)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANH ground short	200 Ω or higher
F5-62 (CAN-) - F5-16 (E1)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANL ground short	200 Ω or higher
F5-61 (CAN+) - A78-1 (BATT)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANH +B short	6 kΩ or higher
F5-62 (CAN-) - A78-1 (BATT)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANL +B short	6 kΩ or higher

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

Result

Result
OK
NG

REPLACE ECM Click here

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - NO. 7 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT IN SUB BUS 15 LINE (SKID CONTROL ECU ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR)

Disconnect the A25 skid control ECU assembly connector.

*a	Front view of wire harness connector (to Skid Control ECU Assembly)

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

Standard Resistance

Tester Connection	Condition	Purpose	Specified Condition
A25-9 (CANH) - A25-1 (GND4)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANH ground short	200 Ω or higher
A25-8 (CANL) - A25-1 (GND4)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANL ground short	200 Ω or higher
A25-9 (CANH) - A25-38 (+BI2)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANH +B short	6 kΩ or higher
A25-8 (CANL) - A25-38 (+BI2)	Cable disconnected from negative (-) auxiliary battery terminal	Inspection for CANL +B short	6 kΩ or higher

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

Result

Result
OK
NG

REPLACE SKID CONTROL ECU ASSEMBLY Click here

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (SKID CONTROL ECU ASSEMBLY - NO. 7 CAN JUNCTION CONNECTOR)