Diagnostic Procedure

1. Turn ignition switch "ON". (Do not start engine.)
2. Check voltage between TCM terminals and ground.
   VOLTAGE CHART
   
   

   Connector	Terminal	Voltage (Approx.)
   E143	1 - Ground	0 - 1.5V
   E142	27 - Ground	Battery voltage
   	34 - Ground
   	38 - Ground
   	39 - Ground

   Fig 1: Checking Voltage Between TCM Connector Terminals And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch "OFF".
4. Check voltage between TCM terminals and ground.
   VOLTAGE CHART
   
   

   Connector	Terminal	Voltage (Approx.)
   E143	1 - Ground	0V
   E142	27 - Ground	Battery voltage
   	34 - Ground	0V
   	38 - Ground	0V
   	39 - Ground	0V

OK or NG 

OK: GO TO  3.

NG: GO TO 2.

Check the following:

• Harness for short or open between battery and TCM terminal 27
• Harness for short or open between ignition switch and TCM terminals 1, 34, 38 and 39
• 15A fuse [No. 19, located in the fuse block (J/B)]
• 10A fuse (No. 48, located in the IPDM E/R)
• Ignition switch. Refer to "POWER SUPPLY ROUTING CIRCUIT ".
• A/T PV IGN relay. Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 3.

NG: Repair or replace damaged parts.

1. Turn ignition switch "OFF".
2. Disconnect TCM harness connector.
3. Check continuity between TCM terminals 14, 48 and ground.

   Continuity should exist. 

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

OK or NG 

OK: GO TO 4.

NG: Repair open circuit or short to ground or short to power in harness or connectors.

Fig 2: Checking Continuity Between TCM Terminals 14, 48 And Ground

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

Check again. Refer to "DTC CONFIRMATION PROCEDURE ".

OK or NG 

OK: INSPECTION END 

NG: GO TO 5.

1. Check TCM input/output signal.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

OK or NG 

OK: INSPECTION END 

NG: Repair or replace damaged parts.