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Diagnostic Test

WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1) CHECK FOR AN ACTIVE DTC 

    Turn the ignition on.

    With the scan tool, record and erase DTCs.

    Wait 30 seconds.

    With the scan tool, read DTCs.

    Does the scan tool display this DTC as active? 

    Yes 

    1. Go to  2).

    No 

    1. The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded or contaminated terminals.
    2. Perform BODY VERIFICATION TEST - VER 1 .
  2. 2) (D506) LIN BUS CIRCUIT  
    Fig 1: Measuring Voltage Of LIN BUS Circuit
    GC0043600Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Compass Module harness connector.

    Turn the ignition on.

    Measure the voltage of the (D506) LIN BUS circuit.

    Is the voltage above 5 volts? 

    Yes 

    1. Go to  4).

    No 

    1. Go to  3).
    2. Perform BODY VERIFICATION TEST - VER 1 .
  3. 3) (D506) LIN BUS CIRCUIT OPEN 

    Turn the ignition off.

    Disconnect the Cluster C3 harness connector.

    Measure the resistance of the (D506) LIN BUS circuit.

    Is the resistance below 10K ohms? 

    Yes 

    1. Replace the Cluster in accordance with the service information.
    2. Perform BODY VERIFICATION TEST - VER 1 .

    No 

    1. Repair the (D506) LIN BUS circuit for an open.
    2. Perform BODY VERIFICATION TEST - VER 1 .
  4. 4) (F929) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN 
    Fig 2: Measuring Voltage Of Fused Ignition Switch Output (Run) Circuit
    GC0043601Courtesy of CHRYSLER LLC

    Measure the voltage of the (F929) Fused Ignition Switch Output (RUN) circuit.

    Is the voltage above 10 volts? 

    Yes 

    1. Go to  5).

    No 

    1. Repair the (F929) Fused Ignition Switch Output (RUN) circuit for an open.
    2. Perform BODY VERIFICATION TEST - VER 1 .
  5. 5) (Z906) GROUND CIRCUIT OPEN 
    Fig 3: Measuring Resistance Between Ground & Ground Circuit
    GC0043602Courtesy of CHRYSLER LLC

    Measure the resistance between ground and the (Z906) Ground circuit.

    Is the resistance below 10K ohms? 

    Yes 

    1. Replace the Compass Module in accordance with the service information.
    2. Perform BODY VERIFICATION TEST - VER 1 .

    No 

    1. Repair the (Z906) ground circuit for an open.
    2. Perform BODY VERIFICATION TEST - VER 1 .
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