DTC 31: Power Supply Cir1, DTC 34 Power Supply Cir2
WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK ICC UNIT CONNECTOR
- Turn ignition switch OFF.
- Disconnect ICC unit connectors and connect them securely again. Erase DTC, then perform self-diagnosis of ICC system again.
OK or NG
- OK: GO TO 2.
- NG:
- Poor connector connection.
- Check connector. Check connector housing for disconnected, loose, bent, and collapsed terminals. If any malfunction is detected, repair as necessary. Erase DTC and perform ICC system running test. Refer to "ICC SYSTEM RUNNING TEST ". Then perform self-diagnosis of ICC system again.
- CHECK POWER SUPPLY CIRCUIT FOR ICC UNIT
- Turn ignition switch ON.
- Check voltage between ICC unit harness connector B17 terminal 33 (R/B), 42 (R/B) and ground.
- Battery voltage should exist.
OK or NG
- OK: GO TO 3.
- NG:
- Repair ICC unit power supply harness.
- Erase DTC and perform ICC system running test. Refer to "ICC SYSTEM RUNNING TEST ". Then perform self-diagnosis of ICC system again.
- CHECK GROUND CIRCUIT FOR ICC UNIT
- Turn ignition switch OFF.
- Disconnect ICC unit connectors.
- Check continuity between ICC unit harness connector B13 terminals 19 (B), 20 (B), and connector B17 terminal 46 (B) and ground.
- Continuity should exist.
OK or NG
- OK: Replace ICC unit. Refer to "ICC UNIT ". Erase DTC and perform ICC system running test. Refer to "ICC SYSTEM RUNNING TEST ". Then perform self-diagnosis of ICC system again.
- NG:
- Repair ICC unit ground harness.
- Erase DTC and perform ICC system running test. Refer to "ICC SYSTEM RUNNING TEST ". Then perform self-diagnosis of ICC system again.