C1008-BRAKE FLUID LEVEL CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
Possible Causes
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(B20) BRAKE FLUID LEVEL SWITCH SIGNAL CIRCUIT OPEN
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(B20) BRAKE FLUID LEVEL SWITCH SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
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BRAKE FLUID LEVEL SWITCH INTERNAL FAILURE
|
(Z905) SENSOR GROUND CIRCUIT OPEN
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TOTALLY INTEGRATED POWER MODULE
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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
No
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
No
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 (Z905) 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
No
4. (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?
Yes
No
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?
Yes
No