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• When Monitored: • Set Condition: Possible Causes BRAKE FLUID LEVEL LOW (B20) BRAKE FLUID LEVEL SWITCH SIGNAL CIRCUIT IS SHORTED TO GROUND BRAKE FLUID LEVEL SWITCH INTERNAL FAILURE TOTALLY INTEGRATED POWER MODULE Diagnostic Test 1. BRAKE FLUID LEVEL SENSOR SIGNAL VOLTAGE BELOW 0.10 VOLTS NOTE: This DTC must be active for the results of this test to be valid. With the scan tool, read Brake Fluid Level Sensor Signal voltage. Is the voltage below 0.10 volt? Yes >> Go To 2 No >> Refer to the INTERMITTENT CONDITION diagnostic procedure. Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE). 2. CHECK BRAKE FLUID LEVEL NOTE: Visually inspect for worn brake linings or undersized rotors. Was low brake fluid level found? Yes >> Repair as needed. Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE). No >> Go To 3 3. BRAKE FLUID LEVEL SENSOR INTERNAL FAILURE Turn the ignition off. Disconnect the Brake Fluid Level Sensor harness connector Turn the ignition on. With the scan tool, read the Brake Fluid Level Sensor voltage Is the voltage approximately 5 volts? Yes >> Replace the Brake Fluid Level Sensor in accordance with the Service Information. Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE). No >> Go To 4 PM BRAKES - ABS ELECTRICAL DIAGNOSTICS 5 - 137 |