Power Amp Shutdown - Premium Audio System
POWER AMP SHUTDOWN - PREMIUMWHEN MONITORED
Ignition in RUN and IOD fuse installed.
SET CONDITION
The radio has sensed a short on the output for more than 10 seconds.
POSSIBLE CAUSES
- Amplifier
- (+) Circuit shorted to ground
- (-) Circuit shorted to ground
- Speaker (+) & (-) circuits shorted together
1. DETERMINE FAULT
Turn the ignition on.
Turn the Radio on.
With the DRBIII(R), erase the audio DTC's.
Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII(R), read the audio DTC's.
Q: Does the DRBIII(R) display POWER AMP SHUTDOWN?
YES: Go To 2
NO: Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
2. SPEAKER SECTION OF POWER AMPLIFIER
Turn the ignition off.
Disconnect the Power Amplifier harness connector.
Turn the ignition on.
Turn the radio on.
With the DRBIII(R), erase the audio DTCs.
Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII(R), read DTC's.
Q: Does the DRBIII(R) display POWER AMP SHUTDOWN?
YES: Go To 3
NO: Replace the Power Amplifier. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
3. (+) CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the Power Amplifier harness connector.
Disconnect the Radio harness connector.
Measure the resistance between ground and any speaker (+) circuit.
Q: Is the resistance below 1000.0 (1K) ohms?
YES: Repair the speaker (+) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 4
4. (-) CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the Power Amplifier harness connector.
Disconnect the Radio harness connector.
Measure the resistance between ground and any speaker (-) circuit.
Q: Is the resistance below 1000.0 (1K) ohms?
YES: Repair the speaker (-) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 5
5. SPEAKER (+) & (-) CIRCUITS SHORTED TOGETHER
Turn the ignition off.
Disconnect the Power Amplifier harness connector.
Disconnect the Radio harness connector.
Measure the resistance between each speaker (+) circuit and each speaker (-) circuit.
Q: Is the resistance below 1000.0 (1K) ohms for any of the measurements?
YES: Repair the speaker circuits shorted together. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 6
6. SPEAKER SECTION OF RADIO
If there are no possible causes remaining, view repair.
Repair
Replace the Radio. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test