Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE 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

Fig 1: Measuring Voltage Of LIN Bus Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Switch Bank 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 GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Cluster C2 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 .
(A909) FUSED B+ CIRCUIT OPEN

Fig 3: Checking Fused B+ Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition on.
2. Measure the voltage of the (A909) Fused B+ circuit at the Switch Bank Module harness connector.
  Is the voltage above 10 volts?
  
  Yes
  - Go To 5
  No
  - Repair the (A909) Fused B+ 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 .
(Z911) GROUND CIRCUIT OPEN

Fig 4: Checking Ground Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Using an Ohm meter, measure the resistance between ground and the (Z911) Ground circuit at the Switch Bank Module harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Switch Bank Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the (Z911) ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .