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) CHECK FOR AN INTERMITTENT CONDITION

Fig 1: Scan Tool - Starscan
Courtesy 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: B146C-CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT HIGH?

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) CHECK FOR VOLTAGE ON THE (X201) AMPLIFIED LEFT FRONT DOOR SPEAKER (+) CIRCUIT

Fig 2: Check For Voltage on Amplified Left Front Door Speaker (+) Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Amplifier C1 harness connector.

Disconnect the Amplified Left Front Door Speaker harness connector.

Turn the ignition on.

Measure for voltage on the (X201) Amplified Left Front Door Speaker (+) circuit.

Is the voltage above 10.0 volts?

Yes
1. Repair the (X201) Amplified Left Front Door Speaker (+) circuit for a short to voltage.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Go To step 3).
3) CHECK FOR VOLTAGE ON THE (X291) AMPLIFIED LEFT FRONT DOOR SPEAKER (-) CIRCUIT

Fig 3: Check For Voltage on Front Amplified Left Front Door Speaker (-) Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Measure for voltage on the (X291) Amplified Left Front Door Speaker (-) circuit.

Is the voltage above 10.0 volts?

Yes
1. Repair the (X291) Amplified Left Front Door Speaker (-) circuit for a short to voltage.
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 .