B1477
B1477-CHANNEL 5 AUDIO SPEAKER OUTPUT CIRCUIT OPENB1477-Channel 5 Audio Speaker Output Circuit Open:
WHEN MONITORED
Amplifier Bus wake-up. Amplifier reset with scan tool.
SET CONDITION
The Amplifier detects an open condition on the speaker output circuit.
POSSIBLE CAUSES
- (X205) left rear speaker (+) circuit open
- (X295) left rear speaker (-) circuit open
- Left rear speaker
- Amplifier
DIAGNOSTIC TEST
1. CHECK FOR AN INTERMITTENT CONDITION
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.
Q: Does the scan tool display active: B1477-CHANNEL 5 AUDIO SPEAKER OUTPUT CIRCUIT OPEN?
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. Body Verification Test
2. CHECK THE OPERATION OF THE LEFT REAR SPEAKER
Disconnect the Left Rear 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 Left Rear Speaker circuits in the Left Rear Speaker harness connector.
Q: Is the voltage present greater than 1 volt?
YES: Replace the Left Rear Speaker.
Perform BODY VERIFICATION TEST VER-1. Body Verification Test
NO: Go To 3
3. CHECK THE (X205) LEFT REAR SPEAKER (+) CIRCUIT FOR AN OPEN
Turn the ignition off.
Disconnect the Amplifier C2 harness connector.
Measure the resistance of the (X205) Left Rear Speaker (+) circuit between the Amplifier C2 harness connector and the Left Rear Speaker harness connector.
Q: Is the resistance below 5.0 ohms?
YES: Go To 4
NO: Repair the (X205) Left Rear Speaker (+) circuit for an open.
Perform BODY VERIFICATION TEST VER-1. Body Verification Test
4. CHECK THE (X295) LEFT REAR SPEAKER (-) CIRCUIT FOR AN OPEN
Turn the ignition off.
Disconnect the Amplifier C2 harness connector.
Measure the resistance of the (X295) Left Rear Speaker (-) circuit between the Amplifier C2 harness connector and the Left Rear Speaker harness connector.
Q: Is the resistance below 5.0 ohms?
YES: Replace the Amplifier.
Perform BODY VERIFICATION TEST VER-1. Body Verification Test
NO: Repair the (X295) Left Rear Shelf Speaker (-) circuit for an open.
Perform BODY VERIFICATION TEST VER-1. Body Verification Test