Left Audio Output 1 Shorted to Ground

LEFT AUDIO OUTPUT 1 SHORT TO GROUND

Left Audio Output 1 Short To Ground:

WHEN MONITORED
With the ignition on.

SET CONDITION
The Hands Free Module detects a short to ground on the (X41) Audio MUX Left circuit.

POSSIBLE CAUSES
- (X41) audio mux left circuit open
- (X41) audio mux left circuit short to ground
- (X140) audio return circuit open
- (X41) audio mux left circuit short to (X140) audio return circuit
- Hands free module

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.

Q: Did this DTC reset?

YES: Go To 2
NO: 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. (X41) AUDIO MUX LEFT CIRCUIT OPEN




Turn the ignition off.
Disconnect the Hands Free Module harness connector.
Disconnect the Radio C2 harness connector.
Measure the resistance of the (X41) Audio MUX Left circuit between the HFM connector and the radio connector.

Q: Is the resistance below 5.0 ohms?

YES: Go To 3
NO: Repair the (X41) Audio MUX Left circuit for an open
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. (X41) AUDIO MUX LEFT CIRCUIT SHORT TO GROUND




Measure the resistance between ground and the (X41) Audio MUX Left circuit.

Q: Is the resistance below 5.0 ohms?

YES: Repair the (X41) Audio MUX Left circuit for short to ground.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 4

4. (X140) AUDIO RETURN CIRCUIT OPEN




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

Q: Is the resistance below 5.0 ohms?

YES: Go To 5
NO: Repair the (X140) Audio Return circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

5. (X41) AUDIO MUX LEFT CIRCUIT SHORT TO (X140) AUDIO RETURN CIRCUIT




Measure the resistance between the (X41) Audio MUX Left circuit and the (X140) Audio Return circuit.

Q: Is the resistance below 5.0 ohms?

YES: Repair the (X41) Audio MUX Left circuit for a short to the (X140) Audio Return circuit.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Hands Free Module.
Perform BODY VERIFICATION TEST - VER 1. Body Verification Test