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.

Turn the radio on.

With the scan tool, erase Amplifier DTCs.

With the scan tool, reset the amplifier.

With the scan tool, read Amplifier DTCs.

Does the scan tool display active: B1477-CHANNEL 5 AUDIO SPEAKER OUTPUT CIRCUIT OPEN?

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 THE OPERATION OF THE LEFT REAR DOOR SPEAKER

Fig 2: Checking Operation Of Left Rear Door Speaker
Courtesy of DAIMLERCHRYSLER CORP.

Disconnect the Left Rear Door Speaker harness connector.

Turn the radio on and turn the volume to mid level.

With a voltmeter set to read in A/C voltage, measure the voltage of the Amplified Left Rear Door Speaker circuits in the Amplified Left Rear Door Speaker harness connector.

Is the voltage present greater than 1 volt?

Yes
1. Replace the Amplified Left I/P Speaker in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Go To step 3).
3) CHECK THE (X205) AMPLIFIED LEFT REAR DOOR SPEAKER (+) CIRCUIT FOR AN OPEN

Fig 3: Amplified Left Rear Door Speaker (+) Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Amplifier C1 harness connector.

Measure the resistance of the (X205) Amplified Left Rear Door Speaker (+) circuit between the Amplifier C1 harness connector and the Amplified Left Rear Door Speaker harness connector.

Is the resistance below 5.0 ohms?

Yes
1. Go To step 4).
No
1. Repair the (X205) Amplified Left Rear Door Speaker (+) circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1 .
4) CHECK THE (X295) AMPLIFIED LEFT REAR DOOR SPEAKER (-) CIRCUIT FOR AN OPEN

Fig 4: Amplified Left Rear Door Speaker (-) Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Amplifier C1 harness connector.

Measure the resistance of the (X295) Amplified Left Rear Door Speaker (-) circuit between the Amplifier C1 harness connector and the Amplified Left Rear Door Speaker harness connector.

Is the resistance below 5.0 ohms?

Yes
1. Replace the Amplifier in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Repair the (X295) Amplified Left Rear Door Speaker (-) circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1 .