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 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 (A973) FUSED B(+) CIRCUIT FOR AN OPEN OR SHORT

Fig 1: Checking Fused B (+) Circuit Using 12-Volt Test Light Connected To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Radio harness connector.
3. Using a 12-volt test light connected to ground, check the (A973) Fused B(+) circuit.
  Does the test light illuminate brightly?
  
  Yes
  - Go To Step 3
  No
  - Repair the open or short in the (A973) Fused B(+) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (Z916) GROUND CIRCUIT FOR AN OPEN

Fig 2: Checking Ground Circuit Using 12-Volt Test Light Connected To 12 Volts
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) OR (D264) CAN C INTERIOR BUS (125K) CIRCUIT FOR AN OPEN

Fig 3: Measuring Resistance Of CAN C Interior Bus (-/+) Circuits
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (D264) CAN C Interior Bus (-) (125K) circuit between the TIPM C7 harness connector and the Radio harness connector.
2. Measure the resistance of the (D265) CAN C Interior Bus (+) (125K) circuit between the TIPM C7 harness connector and the Radio harness connector.
  Is resistance below 5.0 Ohms on both circuits?
  
  Yes
  - Replace the Radio 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 C Interior Bus (125K) circuit. Inspect the connector for damage.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .