Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Infiniti FX45. However, it is still accessible from the selected car via links, so may be relevant.

Check DTC With TCM
Refer to ON BOARD DIAGNOSTIC (OBD) SYSTEM .

OK or NG
1. OK: go to 2.
2. NG: Repair or replace.
Check Starting System
Turn ignition switch OFF, then turn it to START.

Does starter motor operate?

Yes or No
1. Yes: go to 3.
2. No: Refer to STARTERS .
Check PNP Switch Input Signal Circuit For Open And Short-I
1. Turn ignition switch OFF.
2. Disconnect TCM harness connector.
3. Disconnect unified meter and A/C amp. harness connector.
4. Check harness continuity between TCM terminal 9 and unified meter and A/C amp. terminal 32.
  Refer to wiring diagram. See Figure .
  1. Continuity should exist .
5. Also check harness for short to ground and short to power.
OK or NG
1. OK: go to 5 .
2. NG: go to 4.
Detect Malfunctioning Part
Check the following.
- Harness connectors F102, M82
- Harness for open or short between TCM and unified meter and A/C amp."
  1. Repair open circuit or short to ground or short to power in harness or connectors.
Check PNP Switch Input Signal Circuit For Open And Short-II
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 102 and unified meter and A/C amp. terminal 25.
  Refer to wiring diagram. See Figure .
  1. Continuity should exist .
3. Also check harness for short to ground and short to power.
OK or NG
1. OK: go to 6.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
Check Intermittent Incident
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

OK or NG
1. OK: go to 7.
2. NG: Repair or replace.
Replace Unified Meter And A/C AMP
Refer to UNIFIED METER AND A/C AMP .
1. Inspection end