B127A

B127A-COMPASS PERFORMANCE





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

- When Monitored:
With the ignition on.

- Set Condition:
Failure in Compass performance.





1. CHECK FOR AN ACTIVE DTC

NOTE: Remove any electronic devices (laptop computers, cell phones) from the instrument panel.

NOTE: Before proceeding, check the compass variance and calibration.

1. Turn the ignition on.
2. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

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. (F921) FUSED RUN RELAY OUTPUT CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Compass Module harness connector.
3. Ignition on, engine not running.
4. Using a 12-volt test light connected to ground, check the (F921) Fused Run Relay Output circuit.

Does the test light illuminate brightly?

Yes

- Go To 3

No

- Repair the open in the (F921) Fused Run Relay Output circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. (Z916) GROUND CIRCUIT OPEN




1. Turn the ignition off.
2. Using a 12-volt test light connected to 12-volts, check the (Z916) Ground circuit.

Does the test light illuminate brightly?

Yes

- Replace the Compass Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the open in the (Z916) Ground circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.