Diagnostic Procedure

1. Turn ignition switch to "OFF" position.
2. Check voltage between TCM terminal and ground.
   Fig 1: Checking TCM Power Source, Step 1 (1 Of 2)

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 2: Checking TCM Power Source, Step 1 (2 Of 2)

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

OK or NG 

1. OK : GO TO 2.
2. NG : GO TO  3.

1. Turn ignition switch to "ON" position.
2. Check voltage between TCM terminal and ground.
   Fig 3: Checking TCM Power Source, Step 2 (1 Of 2)

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 4: Checking TCM Power Source, Step 2 (2 Of 2)

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

OK or NG 

1. OK : GO TO  4.
2. NG : GO TO 3.

Check the following items:

• Harness for short or open between battery and TCM terminal 9
• Harness for short or open between ignition switch and TCM terminals 2, 3, 33 and 42
• 10A fuse [No. 32 or 35, located in the fuse block (J/B)]
• Ignition switch. Refer to POWER DISTRIBUTION .
• A/T PV IGN relay. Refer to COMPONENT INSPECTION .
• ECM relay. Refer to POWER SUPPLY AND GROUND CIRCUIT in ENGINE CONTROLS.

OK or NG 

1. OK : GO TO 4.
2. NG: Repair or replace damaged parts.

1. Turn ignition switch to "OFF" position.
2. Disconnect TCM harness connector.
3. Check continuity between TCM terminals 5 (B), 14 (B), 24 (B), 46 (B) and ground.
   1. Continuity should exist. 

   If OK, check harness for short to ground and short to power.

OK or NG 

1. OK : GO TO 5.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.

Fig 5: Checking TCM Ground Circuit

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

Check again. Refer to DTC CONFIRMATION PROCEDURE .

OK or NG 

1. OK: INSPECTION END 
2. NG : GO TO 6.

1. Check TCM input/output signals. Refer to TCM INPUT/OUTPUT SIGNAL REFERENCE VALUES .
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

OK or NG 

1. OK: INSPECTION END 
2. NG: Repair or replace damaged parts.