Diagnostic Test

1) CHECK FOR ACTIVE DTC
Turn the ignition on.

With the scan tool, erase the HFM DTCs.

Attempt to make a phone call using the system.

With the scan tool, read the HFM DTCs.

Did this DTC reset?

Yes
1. Go to step 2).
No
1. The condition that set this DTC is no longer present. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
2) (X40) AUDIO MUX RIGHT CIRCUIT OPEN

Fig 1: Checking Resistance Of Audio MUX Right Circuit Between HFM Connector & Radio Connector
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Hands Free Module harness connector.

Disconnect the Radio C2 harness connector.

Measure the resistance of the (X40) Audio MUX Right circuit between the HFM connector and the radio connector.

Is the resistance below 5.0 ohms?

Yes
1. Go to step 3).
No
1. Repair the (X40) Audio MUX Right circuit for an open.
2. Perform BODY VERIFICATION TEST .
3) (X40) AUDIO MUX RIGHT CIRCUIT SHORT TO GROUND

Fig 2: Measuring Resistance Between Ground & (X40) Audio MUX Right Circuit
Courtesy of CHRYSLER LLC

Measure the resistance between ground and the (X40) Audio MUX Right circuit.

Is the resistance below 5.0 ohms?

Yes
1. Repair the (X40) Audio MUX Right circuit for short to ground.
2. Perform BODY VERIFICATION TEST .
No
1. Go to step 4).
4) (X140) AUDIO RETURN CIRCUIT OPEN

Fig 3: Measuring Resistance Of Audio Return Circuit
Courtesy of CHRYSLER LLC

Measure the resistance of the (X140) Audio Return circuit between the HFM connector and the radio connector.

Is the resistance below 5.0 ohms?

Yes
1. Go to step 5).
No
1. Repair the (X140) Audio Return circuit for an open.
2. Perform BODY VERIFICATION TEST .
5) (X40) AUDIO MUX RIGHT CIRCUIT SHORT TO (X140) AUDIO RETURN CIRCUIT

Fig 4: Measuring Resistance Between (X40) Audio MUX Right Circuit & (X140) Audio Return Circuit
Courtesy of CHRYSLER LLC

Measure the resistance between the (X40) Audio MUX Right circuit and the (X140) Audio Return circuit.

Is the resistance below 5.0 ohms?

Yes
1. Repair the (X40) Audio MUX Right circuit for a short to the (X140) Audio Return circuit.
2. Perform BODY VERIFICATION TEST .
No
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 .