Part 2

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: U1004: Lost Communication with Engine Gateway Module
U1004 - Lost Communication with Engine Gateway Module

27. CHECK FOR SHORT IN CAN BUS WIRES (POWER STEERING ECU)

(a) Disconnect the A44 power steering ECU connector.





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

Result





NG -- REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER STEERING ECU (NO. 7 JUNCTION CONNECTOR - POWER STEERING ECU)

OK -- REPLACE POWER STEERING ECU Removal

28. CONNECT CONNECTOR

(a) Reconnect the A66 No. 7 junction connector connector.

NEXT -- Continue to next step.

29. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR)

(a) Disconnect the A86 No. 6 junction connector connector.





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

Standard resistance:





NG -- REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 7 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR)
OK -- Continue to next step.

30. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR SIDE)





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

Standard resistance:





NG -- CONNECT CONNECTOR
OK -- Continue to next step.

31. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - SKID CONTROL ECU)

(a) Disconnect the A65 No. 6 junction connector connector.





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

Result





NG -- CONNECT CONNECTOR
OK -- Continue to next step.

32. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - ECM)

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





Result





NG -- CONNECT CONNECTOR
OK -- Continue to next step.

33. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - DRIVING SUPPORT ECU)

NOTICE:
For vehicles without dynamic radar cruise control system or pre-collision system, go to "CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - FRONT ACTIVE STABILIZER CONTROL ECU)".

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





Result





NG -- CONNECT CONNECTOR
OK -- Continue to next step.

34. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - FRONT ACTIVE STABILIZER CONTROL ECU)

NOTICE:
For vehicles without active stabilizer suspension system, go to "CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)".

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





Result





NG -- CONNECT CONNECTOR
OK -- Continue to next step.

35. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - HYBRID VEHICLE CONTROL ECU)

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





Result





NG -- CONNECT CONNECTOR

OK -- REPAIR OR REPLACE NO. 6 JUNCTION CONNECTOR

36. CONNECT CONNECTOR

(a) Reconnect the A65 and A86 No. 6 junction connector connectors.

NEXT -- Continue to next step.

37. CHECK FOR SHORT IN CAN BUS WIRES (SKID CONTROL ECU)

(a) Disconnect the A19 skid control ECU connector.





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

Result





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SKID CONTROL ECU (CA2H, CA2L)

OK -- REPLACE SKID CONTROL ECU Removal

38. CONNECT CONNECTOR

(a) Reconnect the A65 and A86 No. 6 junction connector connectors.

NEXT -- Continue to next step.

39. CHECK FOR SHORT IN CAN BUS WIRES (ECM)

(a) Disconnect the A13 ECM connector.





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

Result





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO ECM (CA2H, CA2L)

OK -- REPLACE ECM Removal

40. CONNECT CONNECTOR

(a) Reconnect the A65 and A86 No. 6 junction connector connectors.

NEXT -- Continue to next step.

41. CHECK FOR SHORT IN CAN BUS WIRES (DRIVING SUPPORT ECU)

(a) Disconnect the A33 driving support ECU connector.





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

Result





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DRIVING SUPPORT ECU (CA2H, CA2L)

OK -- REPLACE DRIVING SUPPORT ECU Removal

42. CONNECT CONNECTOR

(a) Reconnect the A86 No. 6 junction connector connector.

NEXT -- Continue to next step.