Diagnostic Test
- CHECK FOR AN ACTIVE DTC
- Turn the ignition on.
- Turn the radio on.
- With the scan tool, erase Radio DTCs.
- With the scan tool, reset the Radio.
- With the scan tool, read Radio 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 or BODY VERIFICATION TEST (EV) .
- CHECK THE CABIN EQUALIZATION CURVE NUMBER
- With the scan tool in the BCM ECU Details Tab, Configuration button, record the Cabin Equalization Curve number.
- With the scan tool in the Radio ECU Details Tab, Configuration button, record the True value.NOTE:
The Cabin EQ Curve value found in the BCM should match the True value found in the Radio.
Do the Cabin EQ settings match one another?
Yes
- Replace the Radio in accordance to the service information.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST or BODY VERIFICATION TEST (EV) .
No
- Go To 3
- VERIFY COMMUNICATION WITH BCM
- With the scan tool, read the active modules on the BUS.
Does the scan tool show the BCM active on the BUS?
Yes
- Go To 4
No
- Refer to NO RESPONSE FROM ECU and perform the No Response From Body Control Module (BCM) diagnostic procedure.
- With the scan tool, read the active modules on the BUS.
- CHECK THE BCM FOR ACTIVE DTCs
- With the scan tool, erase BCM DTCs.
- Turn the ignition off. Wait approximately 10 seconds.
- Turn the ignition on.
- With the scan tool, read BCM DTCs.
Are any active DTCs present?
Yes
- Refer to BODY CONTROL MODULE (BCM), DIAGNOSTIC CODE INDEX or BODY CONTROL MODULE (BCM), DIAGNOSTIC CODE INDEX (EV) and perform the appropriate diagnostic procedure.
No
- Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL AND INSTALLATION .
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST or BODY VERIFICATION TEST (EV) .