Instrument Cluster

90A0-BRAKE FLUID LEVEL SWITCH CIRCUIT HIGH





For a complete wiring diagram Consult Diagrams/Electrical.





Diagnostic Test

1. CHECK FOR ACTIVE DTC
Turn the ignition on.
With the scan tool, read DTCs.
Is the DTC active?

Yes

- Go To 2

No

- The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.

2. BRAKE FLUID LEVEL SWITCH
Turn the ignition off.
Disconnect the Brake Fluid Level Switch harness connector.
Connect a jumper wire between the Brake Fluid Level Switch Sense and Return circuits at the Brake Fluid Level Switch harness connector.
With the scan tool, read DTCs.
Is the DTC active?

Yes

- Go To 3

No

- Replace the Brake Fluid Level Switch.
- Perform the BODY VERIFICATION TEST - VER 1. Verification Tests.

3. BRAKE FLUID LEVEL SWITCH SENSE OPEN
Turn the ignition off.
Disconnect the BCM C9 harness connector.
Measure the resistance of the Brake Fluid Level Switch Sense circuit.
Is the resistance above 10K ohms?

Yes

- Repair the Brake Fluid Level Switch Sense circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go To 4

4. BRAKE FLUID LEVEL SWITCH RETURN OPEN
Measure the resistance of the Brake Fluid Level Switch Return circuit.
Is the resistance above 10K ohms?

Yes

- Repair the Brake Fluid Level Switch Return circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Replace the BCM.
- Perform the BODY VERIFICATION TEST - VER 1. Verification Tests.