Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Check input signals:
With CONSULT-II:
1. Start engine.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
  
  Fig 1: Viewing ECU INPUT SIGNALS In DATA MONITOR Mode
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Read out the value of "ATF TEMP SE 1" or "ATF TEMP SE 2".
  
  Fig 2: Reading ATF Temp Sensor Display Values From CONSULT-II Screen
  Courtesy of NISSAN MOTOR CO., U.S.A.
Without CONSULT-II
1. Turn ignition switch ON.
2. Check voltage between TCM connector and ground while warming up A/T. Refer to " WIRING DIAGRAM - A/T - FTS " .
  
  Fig 3: Step 2 Specifications Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 4: Testing Procedures For Step 2
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Turn ignition switch OFF.
4. Disconnect the TCM connector.
5. Check if there is continuity between the connector terminal and ground.
OK or NG
1. OK : GO TO 7.
2. NG : GO TO 2.
Check A/T fluid temperature sensor circuit :
1. Turn ignition switch OFF.
2. Disconnect A/T unit assembly harness connector at the transmission right side.
3. Check the resistance between terminal and ground.
  
  Fig 5: Step 3 Specifications Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 6: Testing Procedures For Step 3
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Reinstall any part removed.
OK or NG
1. OK : GO TO 6.
2. NG : GO TO 3.
Check terminal cord assembly :
1. Remove oil pan. Refer to ," CONTROL VALVE ASSEMBLY " .
2. Disconnect A/T unit assembly harness connector and control valve assembly harness connector.
3. Check continuity between A/T unit assembly harness connector and control valve assembly harness connector.
  
  Fig 7: Step 3 Specifications Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 8: Testing Procedures For Step 3
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
1. OK : GO TO 4.
2. NG : Repair open circuit or short to ground or short to power in harness or connectors.
Check harness between A/T fluid temperature sensor 2 and control valve assembly :
1. Disconnect A/T fluid temperature sensor 2 harness connector and control valve assembly harness connector.
2. Check continuity between A/T fluid temperature sensor 2 harness connector and control valve assembly harness connector.
  
  Fig 9: Step 2 Specifications Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 10: Testing Procedures For Step 2
  Courtesy of NISSAN MOTOR CO., U.S.A.
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.
Check A/T fluid temperature sensor 2 :
- Refer to " COMPONENT INSPECTION " .
OK or NG
1. OK : GO TO 6.
2. NG : Repair or replace damaged parts.
Detect malfunctioning item:
Check the following items:
- Harness for short to ground or short to power or open between TCM and A/T unit assembly harness connector.
OK or NG
1. OK : GO TO 7.
2. NG : Repair or replace damaged parts.
Check DTC:
Perform "DTC Confirmation Procedure". Refer to " DTC CONFIRMATION PROCEDURE " .

OK or NG
1. OK : Inspection end.
2. NG : GO TO 8.
Check TCM
1. Check TCM input/output signal. 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.