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Diagnostic Test

  1. ACTIVE DTC 
    1. Ignition on, engine not running.
    2. With the scan tool, clear DTCs in the PCM.
    3. Press and release the clutch pedal several times.
    4. With the scan tool, select View DTCs.

      Is the status Active for this DTC?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (T141) CLUTCH INTERLOCK SWITCH SIGNAL CIRCUIT VOLTAGE 
    Fig 1: Checking Clutch Interlock Switch Signal Circuit Voltage
    GC0101599Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Clutch Interlock Switch harness connector.
    3. Turn the ignition on.
    4. Measure the voltage of the (T141) Clutch Interlock Switch Signal circuit in the Clutch Interlock Switch harness connector.

      Is the voltage above 10.0 volts?

      Yes 

      • Go To  3

      No 

      • Go To  5
  3. CHECK THE (Z905) GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    Fig 2: Checking Ground Circuit For An Open Or High Resistance
    GC0101600Courtesy of CHRYSLER GROUP, LLC
    1. Using a 12-volt test light connected to 12 volts, check the (Z905) Ground circuit in the Clutch Interlock Switch harness connector.
      NOTE:

      The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

      Is the test light illuminated and bright?

      Yes 

      • Go To  4

      No 

  4. CHECK THE CLUTCH INTERLOCK SWITCH 
    Fig 3: Checking Clutch Interlock Switch Circuit
    GC0101601Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Connect a jumper between the (Z905) Ground circuit and the (T141) Clutch Interlock Switch Signal circuit in the Clutch Interlock Switch harness connector.
    3. Turn the ignition on.
    4. With the scan tool, monitor the Clutch Interlock status.
      NOTE:

      The scan tool should display the Clutch Interlock status as pressed with the jumper in place and not pressed with the jumper removed.

      Does the scan tool display the status as described above?

      Yes 

      • Replace the Clutch Interlock Switch in accordance with the service information.
      • Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  9
  5. CHECK THE (T141) CLUTCH INTERLOCK SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    Fig 4: Checking Clutch Interlock Switch Signal Circuit For Short To Ground
    G00540974Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the PCM C1 harness connector.
    3. Measure the resistance between ground and the (T141) Clutch Interlock Switch Signal circuit in the Clutch Interlock Switch harness connector.

      Is the resistance above 10k Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the (T141) Clutch Interlock Switch Signal circuit for a short to ground.
      • Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  6. CHECK THE (T26) CLUTCH UPSTOP SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the Clutch Switch harness connector.
    3. Measure the resistance between ground and the (T26) Clutch Upstop Switch Signal circuit at the Clutch Switch harness connector.

      Is the resistance above 10k Ohms?

      Yes 

      • Go To  7

      No 

      • Repair the (T26) Clutch Upstop Switch Signal circuit for a short to ground.
      • Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  7. CHECK THE (T141) CLUTCH INTERLOCK SWITCH SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    CAUTION:

    Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the GPEC Diagnostic Adaptor to perform the diagnosis.

    1. Connect the (special tool #10436, Adapter, GPEC Diagnostic).
    2. Measure the resistance of the (T141) Clutch Interlock Switch Signal circuit between the Clutch Interlock Switch harness connector and the GPEC Adaptor.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  8

      No 

      • Repair the (T141) Clutch Interlock Switch Signal circuit for an open or high resistance.
      • Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  8. CHECK THE (T26) CLUTCH UPSTOP SWITCH SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Measure the resistance of the (T26) Clutch Upstop Switch Signal circuit between the Clutch Switch harness connector and the GPEC Adaptor.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  9

      No 

      • Repair the (T26) Clutch Upstop Switch Signal circuit for an open or high resistance.
      • Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  9. POWERTRAIN CONTROL MODULE 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Clutch Interlock Switch and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals.
    4. Perform any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

      • Replace the Powertrain Control Module in accordance with the service information.
      • Perform the PCM VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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