B1488

B1488-CABIN EQ MISMATCH PERFORMANCE

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on.

- Set Condition:
If the Cabin Equalization Curve number message from the Totally Integrated Power Module (TIPM) is not the same as the Cabin Equalization Curve number stored in the Amplifier for 10 consecutive cycles, then the Amplifier will set this DTC.





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. Turn the radio on.
3. With the scan tool, erase Amplifier DTCs.
4. With the scan tool, reset the amplifier.
5. With the scan tool, read Amplifier DTCs.

Does the scan tool display active: B1488-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. Body Verification Test.

2. CHECK AMPLIFIER BUSSED INPUTS/SENSORS
1. With the scan tool in Amplifier 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 should match one another. The Cabin EQ# in the Inputs is the information that is received from the TIPM. The Cabin EQ in the Sensors is the information that is Stored in the Amplifier's memory.

Do the Cabin EQ settings match one another?

Yes

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

No

- Go To 3

3. VERIFY COMMUNICATION WITH TIPM
1. With the scan tool, read the active modules on the BUS.

Does the scan tool show the TIPM active on the BUS?

Yes

- Go To 4

No

- and perform the No Response From TIPM (Totally Integrated Power Module) diagnostic procedure No Response From TIPM (Totally Integrated Power Module).

4. CHECK TIPM FOR ACTIVE DTCs
1. With the scan tool, erase TIPM DTCs.
2. Turn the ignition off. Wait approximately 10 seconds.
3. Turn the ignition on.
4. With the scan tool, read TIPM DTCs.

Are any active DTCs present?

Yes

- Testing and Inspection and perform the appropriate diagnostic procedure.

No

- Replace the Totally Integrated Power Module (TIPM). Totally Integrated Power Module (TIPM) - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.