B1436

B1436-VOICE RECOGNITION/PHONE SWITCH INPUT CIRCUIT LOW





For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
With the ignition on.

- Set Condition:
The Hands Free Module detects voltage below 0.6 volts on the (X730) Voice Recognition/Phone Switch Signal circuit.





Diagnostic Test

1. CHECK FOR ACTIVE DTC
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.
With the scan tool, read the active DTC's.
Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- 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.

2. CHECK THE VOLTAGE OF THE (X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL




Turn the ignition off.
Disconnect the Inside Rear View Mirror C2 harness connector.
Turn the ignition on.
With the scan tool, monitor the VR Phone Switch voltage.
Is the voltage above 4.7 volts?

Yes

- Replace the Inside Rear View Mirror.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.

No

- Go To 3

3. (X730) VOICE/RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORTED TO THE (X835) SENSOR GROUND CIRCUIT




Turn the ignition off.
Disconnect the Hands Free Module harness connector.
Measure the resistance between the (X730) Voice Recognition/Phone Switch Signal circuit and the (X835) Sensor Ground circuit.
Is the resistance below 100.0 ohms?

Yes

- Repair the (X730) Voice Recognition/Phone Switch Signal circuit for a short to the (X835) Sensor Ground circuit.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.

No

- Go To 4

4. (X730) VOICE/RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORTED TO GROUND




Measure the resistance between ground and the (X730) Voice Recognition/Phone Switch Signal circuit.
Is the resistance below 100.0 ohms?

Yes

- Repair the (X730) Voice Recognition/Phone Switch Signal circuit for a short to ground.
- 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.