Diagnostic Test

With the scan tool, read the active DTC's.

Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.

Attempt to make a phone call with the system.

With the scan tool, read the active DTC's.

Does the scan tool display this DTC as active? 

Yes 

1. Go to  2).

No 

1. If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.

Fig 1: Checking Microphone Feed Circuit For Open

Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Hands Free Module harness connector.

Disconnect the Inside Rear View Mirror C2 harness connector.

Measure the resistance of the (X793) Microphone Feed circuit between the HFM connector and the inside rear view mirror connector.

Is the resistance below 5.0 ohms? 

Yes 

1. Go to  3).

No 

1. Repair the (X793) Microphone Feed circuit for an open.
2. Perform BODY VERIFICATION TEST .

Replace the Inside Rear View Mirror in accordance with the service information.

Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.

Attempt to make a phone call with the system.

With the scan tool, read the active DTC's.

Does the scan tool display this DTC as active? 

Yes 

1. Inspect the wiring and connectors for damage or shorted circuits. If OK, replace and program the Hands Free Module in accordance with the service information.
2. Perform BODY VERIFICATION TEST .

No 

1. Repair is complete.
2. Perform BODY VERIFICATION TEST .