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Home >> Jeep >> 2007 >> Liberty Limited, RWD >> Repair and Diagnosis >> Suspension >> Wheels & Tire System >> Tires & Wheels - Electrical Diagnosis >> Tire Pressure Monitoring System >> Diagnosis And Testing >> Left Front Tire Pressure Trigger Module Performance >> Diagnostic Test

Diagnostic Test

  1. 1) DTC STATUS IS ACTIVE 

    Turn the ignition on.

    With the scan tool, select View DTCs in the Wireless Control Module (SKREEM).

    Is the DTC status Active at this time? 

    Yes 

    1. Go to step  2).

    No 

    1. Go to step  9).
  2. 2) (F22) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 1: Checking Fused Ignition Switch Output (RUN) Circuit For Open Or High Resistance
    GC0027845Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Tire Pressure Transponder harness connector.

    Disconnect the Sentry Key Remote Entry Module harness connector.

    Turn the ignition on.

    Using a 12-volt test light connect to ground, check the (F22) Fused Ignition Switch Output (Run) circuit.

    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 

    1. Go to step  3).

    No 

    1. Repair the (F22) Fused Ignition Switch Output (Run) circuit for an open circuit or high resistance.
    2. Perform SKREEM/SKIM VERIFICATION TEST .
  3. 3) (Z384) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE 
    Fig 2: Checking Ground Circuit(s) For Open Or High Resistance
    GC0027846Courtesy of CHRYSLER LLC

    Using a 12-volt test light connect to battery voltage, probe each of the (Z384) Ground circuit(s).

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

    Does the test light illuminate brightly? 

    Yes 

    1. Go to step  4).

    No 

    1. Repair the (Z384) Ground circuit(s) for an open circuit or high resistance.
    2. Perform SKREEM/SKIM VERIFICATION TEST .
  4. 4) (D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO VOLTAGE 
    Fig 3: Checking COM - LIN Tire Pressure Monitor LAN Circuit
    GC0027842Courtesy of CHRYSLER LLC

    Turn the ignition on.

    Measure the voltage of the (D508) COM - LIN Tire Pressure Monitor LAN circuit.

    Is there any voltage present? 

    Yes 

    1. Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to voltage.

    No 

    1. Go to step  5).
    2. Perform SKREEM/SKIM VERIFICATION TEST .
  5. 5) (D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO GROUND 
    Fig 4: Checking COM - LIN Tire Pressure Monitor LAN Circuit
    GC0027843Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Measure the resistance between ground and the (D508) COM - LIN Tire Pressure Monitor LAN circuit.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for a short to ground.
    2. Perform SKREEM/SKIM VERIFICATION TEST .

    No 

    1. Go to step  6).
  6. 6) (D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN OR HIGH RESISTANCE 

    Use a jumper wire with one end connected to ground and the other to the (D508) COM - LIN Tire Pressure Monitor LAN circuit in the Front Left Pressure Tire Transponder harness connector.

    Using a 12-Volt test light connected to battery voltage, probe the (D508) COM - LIN Tire Pressure Monitor LAN circuit in the SKREEM harness connector.

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

    Does the test light illuminate bright? 

    Yes 

    1. Go to step  7).

    No 

    1. Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for an open circuit or high resistance.
    2. Perform SKREEM/SKIM VERIFICATION TEST .
  7. 7) TIRE PRESSURE TRIGGER MODULE 

    Turn the ignition off.

    Replace the appropriate Tire Pressure Trigger Module in accordance with the Service Information.

    With the scan tool, clear DTCs in the Wireless Control Module (SKREEM).

    Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 m.p.h.

    With the scan tool, select View DTCs in the Wireless Control Module (SKREEM).

    Does the DTC reset or is the status Active for this DTC? 

    Yes 

    1. Go to step  8).

    No 

    1. Test Complete.
    2. Perform SKREEM/SKIM VERIFICATION TEST .
  8. 8) WIRELESS CONTROL MODULE (SKREEM) 

    View repair.

    Repair 

    1. Replace the Wireless Control Module (SKREEM) in accordance with the Service Information.
    2. Perform SKREEM/SKIM VERIFICATION TEST .
  9. 9) INTERMITTENT TIRE PRESSURE TRIGGER MODULE DTC 

    The conditions necessary to set this DTC are not present at this time.

    Using the wiring schematic as a guide, inspect the wiring and connectors relative to this circuit.

    Refer to any Technical Service Bulletins that may apply to this condition.

    With the scan tool, clear DTCs in the Wireless Control Module (SKREEM).

    Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 m.p.h.

    With the scan tool, select View DTCs in the Wireless Control Module (SKREEM).

    Does the DTC reset or is the status Active for this DTC? 

    Yes 

    1. Return to the first step of this test and perform the diagnostic procedure.

    No 

    1. Test complete.
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