B1486

B1486-CHANNEL 8 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.





1. CHECK FOR AN INTERMITTENT CONDITION
1. Turn the ignition on and open one of the front doors.

NOTE: A front door must remain open whenever checking or erasing Amplifier DTCs.

2. With the scan tool, record and erase the Amplifier DTCs.
3. Cycle the ignition switch from on to off, wait five seconds and then back to on.
4. Turn the Radio on and set the volume to 20.
5. Adjust the speakers to the front and center.
6. With the scan tool, read the active Amplifier DTCs.

Does the scan tool display active: B1486-CHANNEL 8 AUDIO SPEAKER OUTPUT CIRCUIT OPEN?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE OPERATION OF THE CENTER I/P SPEAKER




1. Turn the ignition off.
2. Disconnect the Center I/P Speaker harness connector.
3. Turn the ignition on.
4. Turn the radio on and turn the volume to 25.
5. Adjust the speakers to the front and center.
6. With a voltmeter set to read in A/C voltage, measure the voltage of the Center I/P Speaker circuits in the Center I/P Speaker harness connector.

Is the voltage present greater than 1 volt?

Yes

- Replace the Center I/P Speaker.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE (X200) AMPLIFIED CENTER I/P SPEAKER (+) CIRCUIT FOR AN OPEN




1. Turn the ignition off.
2. Disconnect the Amplifier C2 harness connector.
3. Measure the resistance of the (X200) Amplified Center I/P Speaker (+) circuit between the Amplifier C2 harness connector and the Center I/P Speaker harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Go To 4

No

- Repair the (X200) Amplified Center I/P Speaker (+) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK THE (X290) AMPLIFIED CENTER I/P SPEAKER (-) CIRCUIT FOR AN OPEN




1. Measure the resistance of the (X290) Amplified Center I/P Speaker (-) circuit between the Amplifier C2 harness connector and the Center I/P Speaker harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Replace the Amplifier.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (X290) Amplified Center I/P Speaker (-) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.