B1488

B1488-CABIN EQ MISMATCH PERFORMANCE



- When Monitored:
With the ignition on.

- Set Condition:
If the cabin EQ message is incompatible with the EQ's 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.
2. Turn the radio on.
3. With the scan tool, erase the Amplifier DTCs.
4. With the scan tool, reset the amplifier.
5. With the scan tool, read the active 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 poor pin fit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK AMPLIFIER BUSSED INPUTS/OUTPUTS
1. With the scan tool in Amplifier Data Display, read the Cabin EQ# settings in the Bussed Inputs and Bussed Outputs Sections.

NOTE: The Cabin EQ# settings in the Inputs/Outputs section should match one another. The Cabin EQ# in the Inputs section is the information that is received from the TIPM. The Cabin EQ# in the Outputs section is the information that is Stored in the Amplifier's memory.

2. The Cabin EQ# settings are as follows:
- $51: Premium 1 (w/o Subwoofer)
- $52: Premium 2 (with Subwoofer)

Do the Cabin EQ# settings match one another?

Yes

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

No

- Go To 3

3. VERIFY COMMUNICATION WITH TOTALLY INTEGRATED POWER MODULE
1. With the scan tool in ECU VIEW, read the active modules on the bus.

Does the scan tool show the Totally Integrated Power Module active on the bus?

Yes

- Go To 4

No

- No Response From TIPM (Totally Integrated Power Module) Perform the No Response from TIPM diagnostic procedure No Response From TIPM (Totally Integrated Power Module).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

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

Are any active DTCs present?

Yes

- Testing and Inspection Perform the appropriate diagnostic procedure.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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