2007 Commander XK Factory Service Manual 8 - ELECTRICAL

B1402-FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT HIGH

For a complete wiring diagram Refer to Section 8W.

Possible Causes

(X53) SPEAKER OUTPUT CIRCUIT (+)

(X55) SPEAKER OUTPUT CIRCUIT (-)

Diagnostic Test

1. INTERMITTENT CONDITION

Turn the ignition on, then off, and then on again.
With the scan tool, read Radio DTCs.

Does the scan tool display active: B1402-FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT HIGH?

Yes

Go To 2

No

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.
Perform BODY VERIFICATION TEST VER-1.

2. CHECK FOR VOLTAGE ON THE (X53) SPEAKER (+) CIRCUIT

Turn the ignition off.
Disconnect the Radio C1 harness connector.
Disconnect the Left Front Speaker harness connector.
Measure for voltage on the (X53) Speaker (+) circuit.

Is the voltage above 10.0 volts?

Yes

Repair the (X53) Speaker (+) circuit for a short to voltage.
Perform BODY VERIFICATION TEST VER-1.

No

Go To 3

3. CHECK FOR VOLTAGE ON THE (X55) SPEAKER (-) CIRCUIT

Measure for voltage on the (X55) Speaker (-) circuit.

Is the voltage above 10.0 volts?

Yes

Repair the (X55) Speaker (-) circuit for a short to voltage.
Perform BODY VERIFICATION TEST VER-1.

No

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