Part 4

NETWORKING: CAN COMMUNICATION SYSTEM: U1002: Lost Communication with Gateway Module (Power Management2)
U1002 - Lost Communication with Gateway Module (Power Management2) (Continued)

16. CHECK FOR SHORT IN CAN BUS LINES (CAN NO. 1 J/C - SKID CONTROL ECU)

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

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

Standard Resistance:

Text in Illustration

NG -- REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (CAN NO. 1 J/C - SKID CONTROL ECU)
OK -- Continue to next step.

17. CHECK FOR SHORT IN CAN BUS LINES (SKID CONTROL ECU)

(a) Reconnect the instrument panel wire and engine room main wire to the CAN No. 1 junction connector.

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

Standard Resistance:

Text in Illustration

NG -- REPLACE CAN NO. 1 JUNCTION CONNECTOR

OK -- REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SKID CONTROL ECU) Removal

18. CHECK FOR SHORT IN CAN BUS LINES (ECM)

(a) Reconnect the instrument panel wire and engine room main wire to the CAN No. 1 junction connector.

(b) Disconnect the ECM connector.

Text in Illustration

NG -- REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 1 J/C - ECM)

OK -- REPLACE ECM Removal

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

(a) Disconnect the wire harness connector from the CAN No. 5 junction connector rear side.

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

Standard Resistance:

Text in Illustration

HINT
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Power Management Bus inspection.

NG -- CHECK CAN BUS LINE (ECU)
OK -- Continue to next step.

20. CHECK FOR SHORT IN CAN BUS LINE (CAN NO. 5 J/C MAIN LINE)

(a) Disconnect the wire harness connector from the CAN No. 5 junction connector front side.

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

Standard Resistance:

Text in Illustration

HINT
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Power Management Bus inspection.

NG -- CHECK FOR SHORT IN CAN BUS LINE (CAN NO. 5 J/C - CAN NO. 1 J/C)

OK -- REPLACE CAN NO. 5 JUNCTION CONNECTOR

21. CHECK FOR SHORT IN CAN BUS LINE (CAN NO. 5 J/C - CAN NO. 1 J/C)

(a) Disconnect the instrument panel wire from the CAN No. 1 junction connector.

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

Standard Resistance:

Text in Illustration

HINT
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Power Management Bus inspection.

NG -- REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 1 J/C - CAN NO. 5 J/C)
OK -- Continue to next step.

22. CHECK FOR SHORT IN CAN BUS LINE (CAN NO. 1 J/C)

(a) Disconnect the engine room main wire from the CAN No. 1 junction connector.

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

Standard Resistance:

HINT
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Power Management Bus inspection.

Text in Illustration

B -- CHECK CAN BUS LINE (ECU)

OK -- REPLACE CAN NO. 1 JUNCTION CONNECTOR

23. CHECK CAN BUS LINE (ECU)

(a) 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.

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

Standard Resistance:

Text in Illustration