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Home >> Jeep >> 2005 >> Wrangler Rubicon, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 603 (Audio System & Video System - Electrical Diagnostics) >> Audio/Video Systems - Electrical Diagnosis >> DTC Troubleshooting >> B1470-Channel 4 Audio Speaker Output Circuit Low >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1)  CHECK FOR AN INTERMITTENT CONDITION 
    Fig 1: Scan Tool - Starscan
    GC0028863Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition on, then off, and then on again.

    With the scan tool, read Amplifier DTCs.

    Does the scan tool display active: B1470-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT LOW? 

    Yes 

    1. Go To step  2).

    No 

    1. The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
    2. Perform BODY VERIFICATION TEST - VER 1 .
  2. 2)  CHECK THE (X202) AMPLIFIED RIGHT FRONT DOOR SPEAKER (+) CIRCUIT FOR A SHORT TO GROUND 
    Fig 2: Amplified Right Front Door Speaker (+) Circuit
    GC0028864Courtesy of DAIMLERCHRYSLER CORP.

    Disconnect the Amplifier C1 harness connector.

    Measure the resistance between ground and the (X202) Amplified Right Front Door Speaker (+) circuit.

    Is the resistance below 10K ohms? 

    Yes 

    1. Repair the (X202) Amplified Left Front Door Speaker (+) circuit for a short to ground.
    2. Perform BODY VERIFICATION TEST - VER 1 .

    No 

    1. Go To step  3).
  3. 3)  CHECK THE (X292) AMPLIFIED RIGHT FRONT DOOR SPEAKER (-) CIRCUIT FOR A SHORT TO GROUND 
    Fig 3: Amplified Right Front Door Speaker (-) Circuit
    GC0028865Courtesy of DAIMLERCHRYSLER CORP.

    Measure the resistance between ground and the (X292) Amplified Right Front Door Speaker (-) circuit.

    Is the resistance below 10K ohms? 

    Yes 

    1. Repair the (X292) Amplified Right Front Door Speaker (-) for a short to ground.
    2. Perform BODY VERIFICATION TEST - VER 1 .

    No 

    1. Go To step  4).
  4. 4)  CHECK OPERATION OF THE AMPLIFIED RIGHT FRONT DOOR SPEAKER 
    Fig 4: Amplified Right Front Door Speaker
    GC0028866Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Reconnect and reinstall the Right Front Door Speaker.

    Measure the resistance of the speaker circuit between the Amplifier C1 harness connector and ground.

    Is the resistance below 10K ohms? 

    Yes 

    1. Replace the Right Front Door Speaker in accordance with the service information.
    2. Perform BODY VERIFICATION TEST - VER 1 .

    No 

    1. Replace the Amplifier in accordance with the service information.
    2. Perform BODY VERIFICATION TEST - VER 1 .
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