Can Communication Circuit Check

1. Turn ignition switch OFF.
2. Check following terminals and connector for damage, bend and loose connection. (control module-side, control unit side and harness-side)
   • TCM
   • ECM
   • ABS/TCS control unit
   • Between ECM and TCM

1. OK or NG 

OK: GO TO 2.

NG: Repair terminal or connector.

1. Disconnect ECM connector and harness connector F53.
2. Check continuity between ECM harness connector F48 terminals 109 (L) and 113 (R).
   Fig 1: Checking Continuity Between ECM Harness Connector F48 Terminals 109 (L) & 113 (R)

   Courtesy of NISSAN MOTOR CO., U.S.A.

1. OK or NG 

OK: GO TO 3.

NG: Repair harness between ECM and harness connector F53.

Check continuity between ECM harness connector F48 terminals 109 (L), 113 (R) and ground.

Fig 2: Checking Continuity Between ECM Harness Connector F48 Terminals 109 (L), 113 (R) & Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

1. OK or NG 

OK: GO TO 4.

NG: Repair harness between ECM and harness connector F53.

1. Disconnect TCM connector.
2. Check continuity between TCM harness connector F51 terminals 5 (L) and 6 (R).
   Fig 3: Checking Continuity Between TCM Harness Connector F51 Terminals 5 (L) & 6 (R)

   Courtesy of NISSAN MOTOR CO., U.S.A.

1. OK or NG 

OK: GO TO 5.

NG: Repair harness between TCM and harness connector F53.

Check continuity between TCM harness connector F51 terminals 5 (L), 6 (R) and ground.

Fig 4: Checking Continuity Between TCM Harness Connector F51 Terminals 5 (L), 6 (R) & Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

1. OK or NG 

OK: GO TO 6.

NG: Repair harness between TCM and harness connector F53.

1. Disconnect harness connector M15.
2. Check continuity between harness connector M15 terminals 14C (L) and 15C (R).
   Fig 5: Checking Continuity Between Harness Connector M15 Terminals 14C (L) & 15C (R)

   Courtesy of NISSAN MOTOR CO., U.S.A.

1. OK or NG 

OK: GO TO 7.

NG: Repair harness between harness connector M223 and harness connector M15.

Check continuity between harness connector M15 terminals 14C (L), 15C (R) and ground.

Fig 6: Checking Continuity Between Harness Connector M15 Terminals 14C (L), 15C (R) & Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

1. OK or NG 

OK: GO TO 8.

NG: Repair harness between harness connector M223 and harness connector M15.

Check continuity between harness connector M15 terminals 11C (L) and 12C (R).

Fig 7: Checking Continuity Between Harness Connector M15 Terminals 11C (L) & 12C (R)

Courtesy of NISSAN MOTOR CO., U.S.A.

1. OK or NG 

OK: GO TO 9.

NG: Repair harness between harness connector M223 and harness connector M15.

Check continuity between harness connector M15 terminals 11C (L), 12C (R) and ground.

Fig 8: Checking Continuity Between Harness Connector M15 Terminals 11C (L), 12C (R) & Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

1. OK or NG 

OK: GO TO 10.

NG: Repair harness between harness connector M223 and harness connector M15.

1. Disconnect ABS/TCS control unit connector.
2. Check continuity between ABS/TCS control unit harness connector E162 terminals 30 (L) and 29 (R).
   Fig 9: Checking Continuity Between ABS/TCS Control Unit Harness Connector E162 Terminals 30 (L) & 29 (R)

   Courtesy of NISSAN MOTOR CO., U.S.A.

1. OK or NG 

OK: GO TO 11.

NG: Repair harness between ABS/TCS control unit and harness connector E81.

Check continuity between ABS/TCS control unit harness connector E162 terminals 30 (L), 29 (R) and ground.

Fig 10: Checking Continuity Between ABS/TCS Control Unit Harness Connector E162 Terminals 30 (L), 29 (R) & Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

1. OK or NG 

OK: GO TO 12.

NG: Repair harness between ABS/TCS control unit and harness connector E81.

Check components inspection. Refer to ECM/TCM INTERNAL CIRCUIT INSPECTION  .

1. OK or NG 

OK: Connect all the connectors and diagnose again. Refer to WORK FLOW  .

NG: Replace ECM and/or TCM.