C1008-BRAKE FLUID LEVEL CIRCUIT HIGHFor a complete wiring diagram Refer to Section 8W.When Monitored:With the ignition on.Set Condition:When the Totally Integrated Power Module indicates that the Brake Fluid Level Circuit is greater than 4.9 volts for more then 5 seconds.
Possible Causes(B20) BRAKE FLUID LEVEL SWITCH SIGNAL CIRCUIT OPEN(B20) BRAKE FLUID LEVEL SWITCH SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGEBRAKE FLUID LEVEL SWITCH INTERNAL FAILURE(Z905) SENSOR GROUND CIRCUIT OPENTOTALLY INTEGRATED POWER MODULE
Diagnostic Test1.BRAKE FLUID LEVEL SWITCH SIGNAL VOLTAGE ABOVE 4.9 VOLTS 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?YesGo To 2NoRefer to the INTERMITTENT CONDITION diagnostic procedure.Refer to the ABS-INTERMITTENT CONDITION TEST. (Refer to 5 - BRAKES - DIAGNOSIS AND TESTING)2. (B20) BRAKE FLUID LEVEL SWITCH SIGNAL CIRCUIT FOR SHORT TO BATTERY VOLTAGETurn 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?YesRepair the (B20) Brake Fluid Level signal circuit for a short to voltage. Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).NoGo To 33.BRAKE FLUID LEVEL SWITCH INTERNAL FAILURETurn the ignition off.Connect a jumper wire between the (B20) Brake Fluid Level signal circuit and the (Z905) Brake Fluid Level ground circuit in the Brake Fluid Level Switch harness connectorTurn the ignition on.With the scan tool, read the Brake Fluid Level Switch voltageIs the voltage below 1.0 volt?YesReplace the Brake Fluid Level Switch in accordance with the Service Information.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).NoGo To44. (B20) BRAKE FLUID LEVEL SWITCH CIRCUIT OPEN Turn the ignition off.Disconnect the Brake Fluid Level Switch.Disconnect the TIPM harness connector.Measure the resistance of the (B20) Brake Fluid Level signal circuit between the Brake Fluid Level Switch harness connector and the TIPM harness connector.Is the resistance below 5 ohms?YesGo To5NoRepair the open in the (B20) Brake Fluid Level Switch signal circuit.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).5. (Z905) SENSOR GROUND CIRCUIT OPEN Turn the ignition off.Disconnect the Brake Fluid Level Switch harness connector.Reconnect the TIPM harness connector.Measure the resistance of the (Z905) Brake Fluid Level Switch ground circuit between the Brake Fluid Level Switch harness connector and ground.Is the resistance below 5.0 ohms?YesReplace and program the Totally Integrated Power Module in accordance with the Service Information.Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).NoRepair the open in the (Z905) Sensor ground circuit .Perform POWERTRAIN VERIFICATION TEST.(Refer to 9 - ENGINE - STANDARD PROCEDURE)