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HOMESERVICE MANUALSDODGE AND RAM2005MAGNUM R/T, AWDREPAIR AND DIAGNOSISELECTRICALGAUGESNAVIGATION SYSTEM & TELECOMMUNICATION SYSTEM - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGB1436-VOICE RECOGNITION/PHONE SWITCH INPUT CIRCUIT LOWDIAGNOSTIC TEST
2005 Dodge and Ram Magnum R/T, AWD

Diagnostic Test

2005 Dodge and Ram Magnum R/T, AWDSECTION Diagnostic Test
  1. 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 

    1. Go To step  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.
  2. 2)  CHECK THE VOLTAGE OF THE (X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL 
    Fig 1: Checking Voice Recognition/Phone Switch Signal
    GC0016193Courtesy of DAIMLERCHRYSLER CORP.

    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 

    1. Replace the Inside Rear View Mirror in accordance with the service information.
    2. Perform BODY VERIFICATION TEST - VER 1 . (Refer to BODY VERIFICATION TEST - VER 1) .

    No 

    1. Go To step  3).
  3. 3)  (X730) VOICE/RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORTED TO THE (X835) SENSOR GROUND CIRCUIT 
    Fig 2: Checking Voice Recognition/Phone Switch Signal & Sensor Ground Circuit
    GC0016194Courtesy of DAIMLERCHRYSLER CORP.

    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 

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

    No 

    1. Go To step  4).
  4. 4)  (X730) VOICE/RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORTED TO GROUND 
    Fig 3: Checking Voice Recognition/Phone Switch Signal Circuit
    GC0016195Courtesy of DAIMLERCHRYSLER CORP.

    Measure the resistance between ground and the (X730) Voice Recognition/Phone Switch Signal circuit.

    Is the resistance below 100.0 ohms? 

    Yes 

    1. Repair the (X730) Voice Recognition/Phone Switch Signal circuit for a short to ground.
    2. Perform BODY VERIFICATION TEST - VER 1 . (Refer to BODY VERIFICATION TEST - VER 1) .

    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 - VER 1 . (Refer to BODY VERIFICATION TEST - VER 1) .
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.