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.

TEST FOR INTERMITTENT CONDITION
NOTE:
Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
1. Turn the ignition on.
  NOTE:
  Make sure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
2. With the scan tool, read the module status.
  NOTE:
  Check the TIPM for any active CAN hardware DTCs. Perform DTC before proceeding.
  
  Does the scan tool indicate that the module is active on the bus?
  
  Yes
  - The no response condition is 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.
  No
  - Go To Step 2
CHECK THE (A416) FUSED B(+) (I.O.D.) CIRCUIT FOR AN OPEN OR SHORT

Fig 1: Checking Fused B(+) (I.O.D.) Circuit For Open Or Short
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Hands Free Module harness connector.
3. Using a 12-volt test light connected to ground, check the (A416) Fused B(+) (I.O.D.) circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To Step 3
  No
  - Repair the open or short in the (A416) Fused B(+) (I.O.D.) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (Z916) GROUND CIRCUIT FOR AN OPEN

Fig 2: Checking Ground Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Using a 12-volt test light connected to 12 volts, check the (Z916) Ground circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To Step 4
  No
  - Repair the open in the (Z916) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (D265) AND (D264) CAN INTERIOR BUS (125K) CIRCUITS FOR AN OPEN

Fig 3: Checking CAN Interior BUS Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the TIPM C7 harness connector.
2. Measure the resistance of the (D264) CAN Interior Bus (-) (125K) circuit between the TIPM C7 harness connector and the HFM harness connector.
3. Measure the resistance of the (D265) CAN Interior Bus (+) (125K) circuit between the TIPM C7 harness connector and the HFM harness connector.
  Are the resistances below 5.0 Ohms for both circuits?
  
  Yes
  - Replace the Hands Free Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the open in the (D265) or (D264) CAN Interior Bus (125K) circuit. Inspect the connector for damage.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .