B147F
B147F - Channel 7 Audio Speaker Output Circuit Low
For a complete wiring diagram, refer to.
• When Monitored: With the ignition on.
• Set Condition: The amplifier detects a short to ground condition on the speaker output circuit.
Test Step 1 - Check for an Intermittent Condition
• Turn the ignition ON, then OFF, and then ON again.
• With the scan tool, check for any amplifier DTCs.
Does the scan tool display B147F - Channel 7 Audio Speaker Output Circuit Low?
Yes
• Go to Test Step 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 the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
Test Step 2 - Check the Subwoofer 1 (+) Circuit for a Short to Ground
• Disconnect the amplifier C1 harness connector.
• Measure the resistance between ground and the subwoofer 1 (+) circuit.
Is the resistance less than 10K ohms?
Yes
• Repair the subwoofer 1 (+) circuit for a short to ground.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Go to Test Step 3.
Test Step 3 - Check the Subwoofer 1 (-) Circuit for a Short to Ground
• Measure the resistance between ground and the subwoofer 1 (-) circuit.
Is the resistance less than 10K ohms?
Yes
• Repair the subwoofer 1 (-) for a short to ground.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Go to Test Step 4.
Test Step 4 - Check Operation of the Subwoofer
• Turn the ignition OFF.
• Connect the subwoofer harness connector.
• Measure the resistance of the speaker circuit between the amplifier C1 harness connector and ground.
Is the resistance less than 10K ohms?
Yes
• Replace the subwoofer 1.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Replace the amplifier.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior