C230A-NEUTRAL INDICATOR CONTROL CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W
- When Monitored:
With the ignition on and no system undervoltage or overvoltage condition present.
- Set Condition:
The Final Drive Control Module detects low voltage on the Neutral Indicator Control Circuit when output is off.
| Possible Causes |
| (G95) 4WD NEUTRAL INDICATOR CIRCUIT OPEN |
| (G95) 4WD NEUTRAL INDICATOR CIRCUIT SHORTED TO GROUND |
| (F943) FUSED IGNITION SWITCH OUTPUT (RUN/START) FOR VOLTAGE |
| (F943) FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT OPEN |
| TRANSFER CASE SELECTOR SWIITCH |
| FINAL DRIVE CONTROL MODULE (FDCM) |
Diagnostic Test
1. DTC IS ACTIVEIgnition on, engine not running.
With the scan tool, read DTCs in the FDCM.
Is the status Active for this DTC?
Yes
- Go to 2
No
- Go to 6
2. (G95) 4WD NEUTRAL INDICATOR CIRCUIT RESISTANCE TO GROUND
Turn the ignition off to the lock position
Disconnect the Final Drive Control Module C2 connector.
Measure the resistance between ground and the (G95) 4WD Neutral Indicator circuit in the FDCM C2 harness connector.
Is the resistance below 5.0 ohms?
Yes
- Go to 3
No
- Go to 4
3. (G95) 4WD NEUTRAL INDICATOR CIRCUIT SHORT TO GROUND
Disconnect the Transfer Case Selector Switch harness connector.
Measure the resistance between ground and the (G95) 4WD Neutral Indicator circuit in the FDCM C2 harness connector.
Is the resistance below 5.0 ohms?
Yes
- Repair the (G95) 4WD Neutral Indicator circuit for a short to ground.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE).
No
- Replace the Transfer Case Selector Switch in accordance with the Service information.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE).
4. (G95) 4WD NEUTRAL INDICATOR CIRCUIT OPEN
Disconnect the Transfer Case Selector Switch harness connector.
Measure the resistance of the (G95) 4WD Neutral Indicator circuit between the Transfer Case Motor harness connector and the Final Drive Control Module C2 harness connector.
Is the resistance above 5.0 ohms?
Yes
- Repair the open (G95) 4WD Neutral Indicator circuit.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE).
No
- Go to 5
5. (F943) FUSED IGNITION SWITCH OUTPUT (RUN/START) VOLTAGE
Ignition on, engine not running.
Measure the voltage of the (F943) Fused Ignition Switch Output (RUN/START) circuit in the Transfer Case Selector Switch harness connector.
Is the voltage above 10.6 volts?
Yes
- Replace the Transfer Case Selector Switch in accordance with the Service information.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE).
No
- Repair the open (F943) Fused Ignition Switch Output (RUN/START) circuit.
6. INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
Look for the data to change or for the DTC to reset during the wiggle test.
Were any problems found?
Yes
- Repair as necessary.
- Perform the TRANSFER CASE VERIFICATION TEST-VER 1 (Refer to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE - STANDARD PROCEDURE).
No
- Test complete.