Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSDODGE AND RAM2011GRAND CARAVAN R/T, GAS/ETHANOLREPAIR AND DIAGNOSISBRAKESANTI-LOCK BRAKESCABIN COMPARTMENT NODE (CCN) (LHD) - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGU0161-LOST COMMUNICATION WITH COMPASS MODULEDIAGNOSTIC TEST

2011 Dodge and Ram Grand Caravan R/T, Gas/Ethanol

Diagnostic Test

2011 Dodge and Ram Grand Caravan R/T, Gas/EthanolSECTION Diagnostic Test

CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2.
  No
  - 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 chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(D506) LIN BUS CIRCUIT OPEN

Fig 1: Checking LIN BUS Circuit For An 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 volts?
  
  Yes
  - Go To 4.
  No
  - Go To 3.
(D506) LIN BUS CIRCUIT OPEN

Fig 2: Checking LIN Bus Circuit For An Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Cluster C1 harness connector.
3. Measure the resistance of the (D506) LIN BUS circuit.
  Is the resistance below 10K ohms?
  
  Yes
  - Replace the Cluster in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the (D506) LIN BUS circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(F921) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN

Fig 3: Checking Fused Ignition Switch Output (RUN) Circuit For An Open
Courtesy of CHRYSLER LLC
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F921) Fused Ignition Switch Output (RUN) circuit at the Compass Module harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5.
  No
  - Repair the (F921) Fused Ignition Switch Output (RUN) circuit for an open. Inspect the related fuse. If the fuse is open, check the circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
(Z905) GROUND CIRCUIT OPEN

Fig 4: Checking Ground Circuit For An Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Using a 12-volt test light connected to 12-volts, check the (Z905) Ground circuit at the Compass Module harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Replace the Compass Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the (Z905) ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.