Diagnostic Test
- CHECK FOR AN ACTIVE DTC
- Turn the ignition on and open one of the front doors.NOTE:
A front door must remain open whenever checking or erasing Amplifier DTCs.
- Turn the radio on.
- With the scan tool, erase Radio DTCs.
- With the scan tool, read Radio DTCs.
Did the DTC return?
Yes
- Go to 2
No
- The condition or conditions that originally set this DTC are not present at this time. Using the appropriate SYSTEM 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. If no problems are found, test complete.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- Turn the ignition on and open one of the front doors.
- CHECK RADIO BUSSED INPUTS/SENSORS
- With the scan tool in Radio Data Display, read the Cabin Equalization Curve number in the Bussed Inputs and Sensors service information.NOTE:
The Cabin EQ Curve settings in the Inputs/Sensors service information should match one another. The Cabin EQ# in the Inputs service information is the information that is received from the BCM. The Cabin EQ in the Sensors service information is the information that is Stored in the Amplifier's memory.
Do the Cabin EQ settings match one another?
Yes
- Replace the Radio in accordance to the service information. Refer to RADIO, REMOVAL .
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Go to 3
- With the scan tool in Radio Data Display, read the Cabin Equalization Curve number in the Bussed Inputs and Sensors service information.
- VERIFY COMMUNICATION WITH AMPLIFIER
- With the scan tool, read the active modules on the BUS.
Does the scan tool show the Amplifier active on the BUS?
Yes
- Go to 4
No
- Perform the No Response From the Amplifier diagnostic procedure. Refer to DIAGNOSIS AND TESTING .
- With the scan tool, read the active modules on the BUS.
- CHECK THE AMPLIFIER FOR ACTIVE DTCs
- With the scan tool, erase Amplifier DTCs.
- Turn the ignition off. Wait approximately 10 seconds.
- Turn the ignition on.
- With the scan tool, read Amplifier DTCs.
Are any active DTCs present?
Yes
- Perform the appropriate diagnostic procedure. Refer to DIAGNOSTIC CODE INDEX .
No
- Replace the Radio in accordance to the service information. Refer to RADIO, REMOVAL .
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .