Diagnostic Test
- CHECK FOR AN INTERMITTENT CONDITION
- 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 TGW DTCs.
- With the scan tool, read TGW DTCs.
Does the scan tool display active: B1488-00-CABIN EQ MISMATCH PERFORMANCE?
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. Refer to BODY VERIFICATION TEST .
- Turn the ignition on and open one of the front doors.
- CHECK TELEMATICS GATEWAY BUSSED INPUTS/SENSORS
- With the scan tool in TGW Data Display, read the Cabin Equalization Curve number in the Bussed Inputs and Sensors Sections.NOTE:
The Cabin EQ Curve settings in the Inputs/Sensors section should match one another. The Cabin EQ# in the Inputs section is the information that is received from the BCM. The Cabin EQ in the Sensors section is the information that is Stored in the Amplifier's memory.
Do the Cabin EQ settings match one another?
Yes
- Replace the Telematics Gateway in accordance to the service information. Refer to MODULE, TELEMATICS GATEWAY, REMOVAL .
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Go To 3.
- With the scan tool in TGW Data Display, read the Cabin Equalization Curve number in the Bussed Inputs and Sensors Sections.
- 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
- Refer to COMMUNICATION - DIAGNOSIS AND TESTING and perform the No Response From the Amplifier diagnostic procedure.
- 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
- Refer to DIAGNOSIS AND TESTING and perform the appropriate diagnostic procedure.
No
- Replace the Telematics Gateway (TGW) in accordance with the Service Information. Refer to MODULE, TELEMATICS GATEWAY, REMOVAL .
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .