Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display: U113B-LOST COMMUNICATION WITH SWITCH BANK 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 Switch Bank 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 3.
  No
  - Repair the (D506) LIN BUS circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
(A935) FUSED B+ CIRCUIT OPEN

Fig 2: Checking Fused B+ Circuit Open
Courtesy of CHRYSLER LLC
1. Measure the voltage of the (A935) Fused B+ circuit.
  Is the voltage above 10.0 volts?
  
  Yes
  - Go To 4.
  No
  - Repair the (A935) Fused B+ circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
(Z908) GROUND CIRCUIT OPEN

Fig 3: Checking Ground Circuit Open
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (Z908) Ground circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Replace the Switch Bank in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
  No
  - Repair the (Z908) Ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .