Diagnostic Test

WARNING: This page is about a different car, the 2009 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR ACTIVE DTC
NOTE: Verify all related fuses are OK before proceeding with this test. Repair if necessary.
1. Turn the ignition on.
2. With a scan tool, read, record and erase WCM DTCs.
3. Turn the ignition off for 30 seconds, then back on.
4. Using the scan tool, read WCM DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go to step 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 DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
WIRELESS CONTROL MODULE (WCM)

Fig 1: Checking Ignition Switch Output (Run-Start) Circuit At WCM Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the WCM harness connector.
3. Turn the ignition on.
4. Using a 12-volt test light connected to ground, probe the (F20) Ignition Switch output (Run-Start) circuit in the WCM harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Replace the Wireless Control Module (WCM) in accordance with the Service Information.
  - Perform the WCM VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Wireless Control (WCM) - Standard Procedure .
  No
  - Go to step 3
(A106) FUSED B+ CIRCUIT

Fig 2: Checking Fused B+ Circuit At Ignition Switch Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Ignition Switch harness connector.
3. Using a 12-volt test light connected to ground, probe the (A106) Fused B+ circuit in the Ignition Switch harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go to step 4
  No
  - Using the wiring diagram as a guide, repair the (A106) Fused B+ circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
(F20) IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN

Fig 3: Measuring Resistance Of Ignition Switch Output (Run-Start) Circuit
Courtesy of CHRYSLER LLC
1. Using an ohmmeter, measure the resistance of the (F20) Ignition Switch Output (Run-Start) circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the Ignition Switch in accordance with the Service Infomation.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Repair the (F20) Ignition Switch Output (Run-Start) circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .