Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display: U0161-LOST COMMUNICATION WITH COMPASS MODULE?
  
  Yes
  - Go To 2.
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
(D506) LIN BUS CIRCUIT OPEN

Fig 1: Checking LIN Bus Circuit Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Compass Module harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (D506) LIN BUS circuit.
  Is the voltage above 5.0 volts?
  
  Yes
  - Go To 4.
  No
  - Go To 3.
(D506) LIN BUS CIRCUIT OPEN

Fig 2: Measuring Resistance Of LIN BUS Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Cluster C3 harness connector.
3. Measure the resistance of the (D506) LIN BUS circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Cluster in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
  No
  - Repair the open in the (D506) LIN BUS circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
(F929) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN

Fig 3: Checking Fused Ignition Switch Output (Run) Circuit Open
Courtesy of CHRYSLER LLC
1. Measure the voltage of the (F929) Fused Ignition Switch Output (RUN) circuit.
  Is the voltage above 10.0 volts?
  
  Yes
  - Go To 5.
  No
  - Repair the open in the (F929) Fused Ignition Switch Output (RUN) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
(Z903) GROUND CIRCUIT OPEN

Fig 4: Checking Ground Circuit Open
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (Z903) Ground circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Replace the Compass Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
  No
  - Repair the open in the (Z903) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .