C230A

C230A- NEUTRAL INDICATOR CONTROL CIRCUIT LOW





When Monitored:
With the ignition on.

Set Condition:
CCM detects low voltage on the Neutral Indicator Control Circuit

Possible Causes
- INTERMITTENT CONDITION
- (G95) 4WD NEUTRAL INDICATOR CIRCUIT OPEN
- (G95) 4WD NEUTRAL INDICATOR CIRCUIT SHORTED TO GROUND TRANSFER CASE SELECTOR SWITCH
- INSTRUMENT CLUSTER MODULE (CCN)

Diagnostic Test
1. NEUTRAL INDICATOR CONTROL CIRCUIT DTC IS ACTIVE





Ignition on.
With the scan tool, Clear DTCs.
Shift the Transfer Case into neutral for 30 seconds.

Note: To select or deselect Transfer Case Neutral, vehicle speed must be 0 MPH with the ignition ON, engine OFF, the brake pedal applied, and the transmission in neutral (auto bans) or the clutch pedal pressed (man trans). Press the Neutral button (if equipped) on the Transfer Case Selector Switch until the Neutral Indicator is illuminated.

WARNING: Apply the parking brake. The vehicle may roll with the Transfer Case in neutral.

Note: To verify that the Transfer Case is in Neutral, shift the automatic transmission into reverse and release the brake pedal for three seconds or shift the manual transmission into gear and slowly release the clutch pedal. There should be no vehicle movement if the Transfer Case is in Neutral.

With the scan tool, Read DTCs.
Does the Neutral Indicator DTC reset?
Yes >>Go to 2
No >>Go to 6

2. (G95) 4WD NEUTRAL INDICATOR CIRCUIT SHORTED TO GROUND





Turn the ignition off.
Disconnect the Instrument Cluster Module (CCN) C3 connector.
Measure the resistance between ground and the (G95) 4WD Neutral Indicator circuit.
Is the resistance below 5.0 ohms?
Yes >>Go to 3
No >>Go to 4

3. TRANSFER CASE SELECTOR SWITCH





Disconnect the Transfer Case Selector Switch connector.
Measure the resistance between ground and the (G95) 4WD Neutral Indicator circuit.
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. Transfer Case Verification Test
No >>Replace the Transfer Case Selector Switch.
Perform the TRANSFER CASE VERIFICATION TEST VER 1.

4. (G95) 4WD NEUTRAL INDICATOR CIRCUIT OPEN





Disconnect the Transfer Case Selector Switch connector.
Measure the resistance of the (G95) 4WD Neutral Indicator circuit.
Is the resistance above 5.0 ohms?
Yes >>Repair the open (G95) 4WD Neutral Indicator circuit.
Perform the TRANSFER CASE VERIFICATION TEST VER 1.
No >>Go to 5

5. INSTRUMENT CLUSTER MODULE
View repair.
Repair
Replace the Instrument Cluster Module in accordance with the Service information.
Perform the TRANSFER CASE VERIFICATION TEST- VER 1.

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.
No >>Test complete.