Part 2
NETWORKING: CAN COMMUNICATION SYSTEM: U1002 (CAN No. 2 BUS): Lost Communication with Gateway Module (Network Gateway ECU)
DTC U1002 (CAN No. 2 BUS) - Lost Communication with Gateway Module (Network Gateway ECU)
INSPECTION PROCEDURE (Continued)
31. CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - DISTANCE CONTROL ECU)
(a) 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. 5 JUNCTION CONNECTOR - YAW RATE SENSOR)
(a) Measure the resistance according to the value(s) in the table below.
Result
NG -- CONNECT CONNECTOR
OK -- REPAIR OR REPLACE NO. 5 JUNCTION CONNECTOR
33. CONNECT CONNECTOR
(a) Reconnect the E68 No. 5 junction connector connector.
NEXT -- Continue to next step.
34. CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR)
(a) Disconnect the E71 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.
35. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - 4WD CONTROL ECU)
(a) Measure the resistance according to the value(s) in the table below.
Result
NG -- CONNECT CONNECTOR
OK -- Continue to next step.
36. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - NETWORK GATEWAY 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
37. CONNECT CONNECTOR
(a) Reconnect the E74 No. 7 junction connector connector.
NEXT -- Continue to next step.
38. CHECK FOR SHORT IN CAN BUS WIRES (STEERING CONTROL ECU)
(a) Disconnect the E84 steering 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 STEERING CONTROL ECU (CANH, CANL)
OK -- REPLACE STEERING CONTROL ECU
39. CONNECT CONNECTOR
(a) Reconnect the E74 No. 7 junction connector connector.
NEXT -- Continue to next step.
40. CHECK FOR SHORT IN CAN BUS WIRES (STEERING ANGLE SENSOR)
(a) Disconnect the E11 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 (CANH, CANL)
OK -- REPLACE STEERING ANGLE SENSOR
41. CONNECT CONNECTOR
(a) Reconnect the E74 No. 7 junction connector connector.
NEXT -- Continue to next step.
42. CHECK FOR SHORT IN CAN BUS WIRES (SKID CONTROL ECU)
(a) Disconnect the A24 master cylinder solenoid (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 MASTER CYLINDER SOLENOID (SKID CONTROL ECU) (CANH, CANL)
OK -- REPLACE MASTER CYLINDER SOLENOID (SKID CONTROL ECU)
43. CONNECT CONNECTOR
(a) Reconnect the E74 No. 7 junction connector connector.
NEXT -- Continue to next step.
44. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION CONNECTOR - SUSPENSION CONTROL ECU)
(a) Disconnect the K41 No. 1 CAN junction connector connector.
(b) Measure the resistance according to the value(s) in the table below.
Result
NG -- CHECK FOR SHORT IN CAN BUS WIRES (SUSPENSION CONTROL ECU)
OK -- Continue to next step.
45. CONNECT CONNECTOR
(a) Reconnect the E74 No. 7 junction connector connector.
NEXT -- Continue to next step.
46. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION CONNECTOR)
(a) Measure the resistance according to the value(s) in the table below.
Result
NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO NO. 1 CAN JUNCTION CONNECTOR (CANH, CANL)
OK -- REPLACE NO. 1 CAN JUNCTION CONNECTOR
47. CHECK FOR SHORT IN CAN BUS WIRES (SUSPENSION CONTROL ECU)
(a) Disconnect the F38 suspension 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 SUSPENSION CONTROL ECU (CANH, CANL)
OK -- REPLACE SUSPENSION CONTROL ECU
48. CONNECT CONNECTOR
(a) Reconnect the F21 No. 6 junction connector connector.
NEXT -- Continue to next step.
49. CHECK FOR SHORT IN CAN BUS WIRES (PARKING ASSIST ECU)
(a) Disconnect the F36 parking assist 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 PARKING ASSIST ECU (CANH, CANL)
OK -- REPLACE PARKING ASSIST ECU
50. CONNECT CONNECTOR
(a) Reconnect the E68 No. 5 junction connector connector.
NEXT -- Continue to next step.
51. CHECK FOR SHORT IN CAN BUS WIRES (SEAT BELT CONTROL ECU)
(a) Disconnect the E42 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
52. CONNECT CONNECTOR
(a) Reconnect the E68 No. 5 junction connector connector.
NEXT -- Continue to next step.
53. CHECK FOR SHORT IN CAN BUS WIRES (DISTANCE CONTROL ECU)
(a) Disconnect the E86 distance 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 DISTANCE CONTROL ECU (CANH, CANL)
OK -- REPLACE DISTANCE CONTROL ECU ASSEMBLY
54. CONNECT CONNECTOR
(a) Reconnect the E68 No. 5 junction connector connector.
NEXT -- Continue to next step.
55. CHECK FOR SHORT IN CAN BUS WIRES (YAW RATE SENSOR)
(a) Disconnect the E50 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 (CANH, CANL)
OK -- REPLACE YAW RATE SENSOR ASSEMBLY
56. CONNECT CONNECTOR
(a) Reconnect the E71 No. 4 junction connector connector.
NEXT -- Continue to next step.
57. CHECK FOR SHORT IN CAN BUS WIRES (4WD CONTROL ECU)
(a) Disconnect the A27 4WD 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 4WD CONTROL ECU (CAN+, CAN-)
OK -- REPLACE 4WD CONTROL ECU
58. CONNECT CONNECTOR
(a) Reconnect the E71 No. 4 junction connector connector.
NEXT -- Continue to next step.
59. CHECK FOR SHORT IN CAN BUS WIRES (NETWORK GATEWAY ECU)
(a) Disconnect the E31 network gateway 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 NETWORK GATEWAY ECU (CA2H, CA2L)
OK -- REPLACE NETWORK GATEWAY ECU
60. CHECK HARNESS AND CONNECTOR (NETWORK GATEWAY 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 E31 network gateway ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE NETWORK GATEWAY ECU