Part 2
NETWORKING: CAN COMMUNICATION SYSTEM: U1002 (CAN MS BUS): Lost Communication with Gateway Module (Main body ECU)
DTC U1002 (CAN MS BUS) - Lost Communication with Gateway Module (Main body ECU)
INSPECTION PROCEDURE (Continued)
31. CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 CAN JUNCTION CONNECTOR - NO. 2 MAIN BODY ECU)
(a) Measure the resistance according to the value(s) in the table below.
Result
NG -- CONNECT CONNECTOR
OK -- REPLACE NO. 2 CAN JUNCTION CONNECTOR
32. CONNECT CONNECTOR
(a) Reconnect the L29 and L30 No. 2 CAN junction connector connectors.
NEXT -- Continue to next step.
33. CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 CAN JUNCTION CONNECTOR - NO. 8 JUNCTION CONNECTOR)
(a) Disconnect the E76 No. 8 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. 8 JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR)
OK -- Continue to next step.
34. CHECK FOR SHORT IN CAN BUS WIRES (NO. 8 JUNCTION CONNECTOR - CERTIFICATION ECU)
(a) Disconnect the E76 No. 8 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.
35. CHECK FOR SHORT IN CAN BUS WIRES (NO. 8 JUNCTION CONNECTOR - POSITION CONTROL ECU AND SWITCH)
(a) Measure the resistance according to the value(s) in the table below.
NG -- CONNECT CONNECTOR
OK -- Continue to next step.
36. CHECK FOR SHORT IN CAN BUS WIRES (NO. 8 JUNCTION CONNECTOR - MULTIPLEX TILT AND TELESCOPIC ECU)
(a) Measure the resistance according to the value(s) in the table below.
NG -- CONNECT CONNECTOR
OK -- Continue to next step.
37. CHECK FOR SHORT IN CAN BUS WIRES (NO. 8 JUNCTION CONNECTOR - OUTER MIRROR CONTROL ECU)
(a) Measure the resistance according to the value(s) in the table below.
NG -- CONNECT CONNECTOR
OK -- Continue to next step.
38. CHECK FOR SHORT IN CAN BUS WIRES (NO. 8 JUNCTION CONNECTOR - MAIN BODY ECU)
(a) Measure the resistance according to the value(s) in the table below.
NG -- CONNECT CONNECTOR
OK -- REPAIR OR REPLACE NO. 8 JUNCTION CONNECTOR
39. CONNECT CONNECTOR
(a) Reconnect the E70 No. 10 junction connector connector.
NEXT -- Continue to next step.
40. CHECK FOR SHORT IN CAN BUS WIRES (COMBINATION METER)
(a) Disconnect the E77 combination meter connector.
(b) Measure the resistance according to the value(s) in the table below.
Result
NG -- REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER (MPX+, MPX-)
OK -- REPLACE COMBINATION METER ASSEMBLY
41. CONNECT CONNECTOR
(a) Reconnect the E73 No. 9 junction connector connector.
NEXT -- Continue to next step.
42. CHECK FOR SHORT IN CAN BUS WIRES (BUS BUFFER ECU)
(a) Disconnect the P5 bus buffer 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 BUS BUFFER ECU (CANP, CANN)
OK -- REPLACE BUS BUFFER ECU
43. CONNECT CONNECTOR
(a) Reconnect the E73 No. 9 junction connector connector.
NEXT -- Continue to next step.
44. CHECK FOR SHORT IN CAN BUS WIRES (WINDSHIELD WIPER ECU)
(a) Disconnect the E90 windshield wiper 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 WINDSHIELD WIPER ECU (CANH, CANL)
OK -- REPLACE WINDSHIELD WIPER ECU
45. CONNECT CONNECTOR
(a) Reconnect the E73 No. 9 junction connector connector.
NEXT -- Continue to next step.
46. CHECK FOR SHORT IN CAN BUS WIRES (TIRE PRESSURE WARNING ECU)
(a) Disconnect the L10 tire pressure warning 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 TIRE PRESSURE WARNING ECU (CANP, CANN)
OK -- REPLACE TIRE PRESSURE WARNING ECU
47. CONNECT CONNECTOR
(a) Reconnect the E73 No. 9 junction connector connector.
NEXT -- Continue to next step.
48. CHECK FOR SHORT IN CAN BUS WIRES (POWER BACK DOOR UNIT)
(a) Disconnect the L36 power back door unit (power back door 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 POWER BACK DOOR UNIT (POWER BACK DOOR ECU) (MPX1, MPX2)
OK -- REPLACE POWER BACK DOOR UNIT ASSEMBLY (POWER BACK DOOR ECU)
49. CONNECT CONNECTOR
(a) Reconnect the E73 No. 9 junction connector connector.
NEXT -- Continue to next step.
50. CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 MAIN BODY ECU)
(a) Disconnect the L33 No. 2 main body 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 NO. 2 MAIN BODY ECU (MPX+, MPX-)
OK -- REPLACE NO. 2 MAIN BODY ECU
51. CONNECT CONNECTOR
(a) Reconnect the E76 No. 8 junction connector connector.
NEXT -- Continue to next step.
52. CHECK FOR SHORT IN CAN BUS WIRES (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))
(a) Disconnect the E29 certification ECU (smart key 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 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (CANH, CANL)
OK -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
53. CONNECT CONNECTOR
(a) Reconnect the E76 No. 8 junction connector connector.
NEXT -- Continue to next step.
54. CHECK FOR SHORT IN CAN BUS WIRES (POSITION CONTROL ECU AND SWITCH)
(a) Disconnect the c15 position control ECU and switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Result
NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POSITION CONTROL ECU AND SWITCH (MPX1, MPX2)
OK -- REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY
55. CONNECT CONNECTOR
(a) Reconnect the E76 No. 8 junction connector connector.
NEXT -- Continue to next step.
56. CHECK FOR SHORT IN CAN BUS WIRES (MULTIPLEX TILT AND TELESCOPIC ECU)
(a) Disconnect the E27 multiplex tilt and telescopic 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 MULTIPLEX TILT AND TELESCOPIC ECU (CANP, CANN)
OK -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU
57. CONNECT CONNECTOR
(a) Reconnect the E76 No. 8 junction connector connector.
NEXT -- Continue to next step.
58. CHECK FOR SHORT IN CAN BUS WIRES (OUTER MIRROR CONTROL ECU)
(a) Disconnect the I18 outer mirror 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 OUTER MIRROR CONTROL ECU (CANH, CANL)
OK -- REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY
59. CONNECT CONNECTOR
(a) Reconnect the E76 No. 8 junction connector connector.
NEXT -- Continue to next step.
60. CHECK FOR SHORT IN CAN BUS WIRES (MAIN BODY ECU)
(a) Disconnect the E3 main body ECU (cowl side junction block LH) connector.
(b) Measure the resistance according to the value(s) in the table below.
Result
NG -- REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) (CANP, CANN)
OK -- REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)
61. CHECK HARNESS AND CONNECTOR (MAIN BODY 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 2A, 2D and E3 main body ECU (cowl side junction block LH) connectors.
(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 MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)