Part 2

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: U1005: Lost Communication with Electronically Controlled Brake Gateway Module
U1005 - Lost Communication with Electronically Controlled Brake Gateway Module

Result

NG -- REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER STEERING ECU (NO. 5 JUNCTION CONNECTOR - POWER STEERING ECU)

OK -- REPLACE POWER STEERING ECU Removal

28. CONNECT CONNECTOR

(a) Reconnect the L99 No. 5 junction connector connector.

NEXT -- Continue to next step.

29. CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR)

(a) Disconnect the S58 No. 4 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. 5 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR)
OK -- Continue to next step.

30. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR SIDE)

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

Standard resistance:

Result

B -- CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - SEAT BELT CONTROL ECU)

C -- REPAIR OR REPLACE NO. 4 JUNCTION CONNECTOR
A -- Continue to next step.

31. CONNECT CONNECTOR

(a) Reconnect the S58 No. 4 junction connector connector.

NEXT -- Continue to next step.

32. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)

(a) Disconnect the L97 No. 2 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. 4 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)
OK -- Continue to next step.

33. CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 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.

34. CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - YAW RATE SENSOR)

(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.2 JUNCTION CONNECTOR - STEERING ANGLE SENSOR)

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

Result

NG -- CONNECT CONNECTOR

OK -- REPAIR OR REPLACE NO. 2 JUNCTION CONNECTOR

36. CONNECT CONNECTOR

(a) Reconnect the L97 No. 2 junction connector connector.

NEXT -- Continue to next step.

37. CHECK FOR SHORT IN CAN BUS WIRES (YAW RATE SENSOR)

(a) Disconnect the L71 yaw rate sensor connector.

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

Result

NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO YAW RATE SENSOR (CA1H, CA1L)

OK -- REPLACE YAW RATE SENSOR Removal

38. CONNECT CONNECTOR

(a) Reconnect the L97 No. 2 junction connector connector.

NEXT -- Continue to next step.

39. CHECK FOR SHORT IN CAN BUS WIRES (STEERING ANGLE SENSOR)

(a) Disconnect the L21 steering angle sensor connector.

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

Result

NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO STEERING ANGLE SENSOR (CA1H, CA1L)

OK -- REPLACE STEERING ANGLE SENSOR Removal

40. CONNECT CONNECTOR

(a) Reconnect the L97 No. 2 junction connector connector.

NEXT -- Continue to next step.

41. CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)

(a) Disconnect the A67 No. 1 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. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)
OK -- Continue to next step.

42. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - SKID CONTROL ECU)

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

Result

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

43. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - DRIVING SUPPORT ECU)

NOTICE:
For vehicles without dynamic radar cruise control system, without pre-collision system or without lane keeping assist system, go to " CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 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.

44. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 JUNCTION CONNECTOR - ECM)

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

Result

NG -- CONNECT CONNECTOR

OK -- REPAIR OR REPLACE NO. 1 JUNCTION CONNECTOR

45. CONNECT CONNECTOR

(a) Reconnect the A67 No. 1 junction connector connector.

NEXT -- Continue to next step.

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

(a) Disconnect the A21 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 (CA1H, CA1L)

OK -- REPLACE SKID CONTROL ECU Removal

47. CONNECT CONNECTOR

(a) Reconnect the A67 No. 1 junction connector connector.

NEXT -- Continue to next step.

48. 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 (CA1H, CA1L)

OK -- REPLACE DRIVING SUPPORT ECU Removal

49. CONNECT CONNECTOR

(a) Reconnect the A67 No. 1 junction connector connector.

NEXT -- Continue to next step.

50. 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 MAIN WIRE CONNECTED TO ECM (NO. 1 JUNCTION CONNECTOR - ECM)

OK -- REPLACE ECM Removal

51. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - SEAT BELT CONTROL ECU)

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

Result

NG -- CONNECT CONNECTOR

OK -- REPAIR OR REPLACE NO. 4 JUNCTION CONNECTOR

52. CONNECT CONNECTOR

(a) Reconnect the S58 No. 4 junction connector connector.

NEXT -- Continue to next step.

53. CHECK FOR SHORT IN CAN BUS WIRES (SEAT BELT CONTROL ECU)

(a) Disconnect the S47 seat belt 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 SEAT BELT CONTROL ECU (CANH, CANL)

OK -- REPLACE SEAT BELT CONTROL ECU Removal

54. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BATTERY AND BODY GROUND)

(a) Connect the cable to the negative (-) battery terminal.

NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.

(b) Disconnect the A19 and A21 skid control ECU connectors.

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

Standard voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE SKID CONTROL ECU Removal