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Home >> Jeep >> 2005 >> Wrangler Rubicon, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 537 (Tires & Wheels) >> Tire Pressure Monitoring System - Electrical Diagnosis >> Diagnosis And Testing >> C1507-Right Front Tire Pressure Trigger Module Performance >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  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)  (D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO VOLTAGE 
    Fig 1: COM - LIN Tire Pressure Monitor LAN Circuit
    GC0027847Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the Tire Pressure Transponder harness connector.

    Disconnect the Sentry Key Remote Entry Module harness connector.

    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  3).
  3. 3)  (D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT SHORT TO GROUND 
    Fig 2: COM - LIN Tire Pressure Monitor LAN Circuit
    GC0027848Courtesy of DAIMLERCHRYSLER CORP.

    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.

    No 

    1. Go to step  4).
  4. 4)  (D508) COM - LIN TIRE PRESSURE MONITOR LAN CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 3: COM - LIN Tire Pressure Monitor LAN Circuit
    GC0027849Courtesy of DAIMLERCHRYSLER CORP.

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

    Is the resistance above 5.0 ohms? 

    Yes 

    1. Repair the (D508) COM - LIN Tire Pressure Monitor LAN circuit for an open circuit or high resistance.

    No 

    1. Go to step  5).
  5. 5)  (F924) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 4: Fused Ignition Switch Output Circuit
    GC0027850Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition on.

    Using a 12-volt test light connect to ground, check the (F924) 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  6).

    No 

    1. Repair the (F924) Fused Ignition Switch Output (Run) circuit for an open circuit or high resistance.
  6. 6)  (Z924) GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE 
    Fig 5: Ground Circuits Open of High Resistance
    GC0027851Courtesy of DAIMLERCHRYSLER CORP.

    Using a 12-volt test light connect to 12 volts, check each of the (Z924) Ground circuit(s).

    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  7).

    No 

    1. Repair the (Z924) Ground circuit(s) for an open circuit or high resistance.
  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.
  8. 8)  WIRELESS CONTROL MODULE (SKREEM) 

    View repair.

    Repair 

    1. Replace the Wireless Control Module (SKREEM) in accordance with the Service Information.
  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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