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Home >> Jeep >> 2009 >> Commander Overland, RWD >> Repair and Diagnosis >> Transmission >> Transfer Case >> (Final Drive Control Module (FDCM) - Electrical Diagnostics) >> DTC Troubleshooting >> C230B- Neutral Indicator Control Circuit High >> Diagnostic Test
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Diagnostic Test

  1. NEUTRAL INDICATOR CONTROL CIRCUIT DTC IS ACTIVE 
    1. Ignition on, engine not running.
    2. With the scan tool, read DTCs.

      Is the status Active for this DTC?

      Yes 

      • Go to step  2

      No 

      • Go to step  6
  2. (G95) 4WD NEUTRAL INDICATOR CIRCUIT VOLTAGE 
    Fig 1: Checking 4WD Neutral Indicator Circuit Voltage
    GC0120069Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position
    2. Disconnect the FDCM C2 harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage of the (G95) 4WD Neutral Indicator circuit.

      Is there any voltage present?

      Yes 

      • Go to step  3

      No 

      • Go to step  4
  3. (G95) 4WD NEUTRAL INDICATOR CIRCUIT SHORT TO VOLTAGE 
    Fig 2: Checking 4WD Neutral Indicator Circuit Voltage
    GC0120069Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position
    2. Disconnect the Transfer Case Selector Switch harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage of the (G95) 4WD Neutral Indicator circuit.

      Is there any voltage present?

      Yes 

      No 

      • Go to step  5
  4. (G95) 4WD NEUTRAL INDICATOR CIRCUIT OPEN 
    Fig 3: Checking 4WD Neutral Indicator Circuit Open
    GC0120067Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position
    2. Disconnect the Transfer Case Selector Switch harness connector.
    3. Measure the resistance of the (G95) 4WD Neutral Indicator Control 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 

      No 

  5. TRANSFER CASE SELECTOR SWITCH 

    View repair.

    Repair 

  6. INTERMITTENT WIRING AND CONNECTORS 
    1. The conditions necessary to set this DTC are not present at this time.
    2. Using the SYSTEM WIRING DIAGRAMS as a guide, inspect the wiring and connectors.
    3. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
    4. Look for the data to change or for the DTC to reset during the wiggle test.

      Were any problems found?

      Yes 

      No 

      • Test complete.