C1008

C1008-BRAKE FLUID LEVEL CIRCUIT HIGH





For a complete wiring diagram Refer to Diagram/Electrical. Diagrams By Number


- When Monitored:

With the ignition on.

- Set Condition:

When the Front Control Module indicates that the Brake Fluid Level Circuit is greater than 4.9 volts for more then 5 seconds.







Diagnostic Test


1. BRAKE FLUID LEVEL SWITCH SIGNAL VOLTAGE ABOVE 4.9 VOLTS

NOTE: This DTC must be active for the results of this test to be valid.

Turn the ignition on.

With the scan tool, read Brake Fluid Level Switch Signal voltage.

Is the voltage above 4.9 volts?

Yes

- Go To 2

No

- Refer to the INTERMITTENT CONDITION diagnostic procedure. Testing and Inspection
- Perform ABS VERIFICATION TEST. ABS Verification Test


2. (B20) BRAKE FLUID LEVEL SWITCH SIGNAL CIRCUIT FOR SHORT TO BATTERY VOLTAGE





Turn the ignition off.

Disconnect the Brake Fluid Level Switch harness connector.

Turn the ignition on.

Measure the voltage of the (B20) Brake Fluid Level signal circuit in the Brake Fluid Level Switch harness connector to ground.

Is the voltage above 5.2 volts?

Yes

- Repair the (B20) Brake Fluid Level signal circuit for a short to voltage.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Go To 3


3. BRAKE FLUID LEVEL SWITCH INTERNAL FAILURE





Turn the ignition off.

Connect a jumper wire between the (B20) Brake Fluid Level signal circuit and the (Z902) Brake Fluid Level ground circuit in the Brake Fluid Level Switch harness connector

Turn the ignition on.

With the scan tool, read the Brake Fluid Level Switch voltage

Is the voltage below 1.0 volt?

Yes

- Go To4

No

- Go To5


4. BRAKE SWITCH RESISTANCE





Turn the ignition off.

Measure the resistance of the Brake Fluid Level Switch.

Is the resistance between 900-1100 ohms?

Yes

- Refer to the INTERMITTENT CONDITION diagnostic procedure. Testing and Inspection
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Replace the Brake Fluid Level Switch.
- Perform ABS VERIFICATION TEST. ABS Verification Test


5. (B20) BRAKE FLUID LEVEL SWITCH CIRCUIT OPEN





Turn the ignition off.

Disconnect the Front Control Module harness connector.

Measure the resistance of the (B20) Brake Fluid Level signal circuit between the Brake Fluid Level Switch harness connector and the FCM harness connector.

Is the resistance below 5 ohms?

Yes

- Go To6

No

- Repair the open in the (B20) Brake Fluid Level Switch signal circuit.
- Perform ABS VERIFICATION TEST. ABS Verification Test


6. (Z902) SENSOR GROUND CIRCUIT OPEN





Reconnect the FCM harness connector.

Measure the resistance of the (Z902) Brake Fluid Level Switch ground circuit between the Brake Fluid Level Switch harness connector and ground.

Is the resistance below 5.0 ohms?

Yes

- Replace the Front Control Module.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Repair the open in the (Z902) Sensor ground circuit.
- Perform ABS VERIFICATION TEST. ABS Verification Test