C1008

C1008 - Brake Fluid Level Circuit High






For a complete wiring diagram, refer to.

• 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.






Test Step 1 - Brake Fluid Level Switch Signal Voltage more than 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 more than 4.9 volts?

Yes

• Go to Test Step 2.

No

• Perform the ABS Intermittent Test. Refer to => Non-DTC Based Diagnostics. ABS Intermittent Condition Test

Test Step 2 - Brake Fluid Level Switch Signal Circuit 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 brake fluid level signal circuit in the brake fluid level switch harness connector to ground.

Is the voltage more than 5.2 volts?

Yes

• Repair the brake fluid level signal circuit for a short to voltage.

• Perform ABS Verification Test. Refer to => Non-DTC Based Diagnostics. ABS Verification Test

No

• Go to Test Step 3.

Test Step 3 - Brake Fluid Level Switch Internal Failure






• Turn the ignition OFF.

• Connect a jumper wire between the signal circuit and the return circuit in the switch harness connector.

• Turn the ignition ON.

• With the scan tool, read the voltage

Is the voltage less than 1.0 volt?

Yes

• Go to Test Step 4.

No

• Go to Test Step 5.

Test Step 4 - Brake Switch Resistance

• Turn the ignition OFF.

• Measure the resistance of the brake fluid level switch.

Is the resistance between 9k - 11k ohms?

Yes

• Perform the ABS Intermittent Condition Test. Refer to => Non-DTC Based Diagnostics. ABS Intermittent Condition Test

No

• Replace the brake fluid level switch.

• Perform the ABS Verification Test. Refer to => Non-DTC Based Diagnostics. ABS Verification Test

Test Step 5 - Brake Fluid Level Switch Circuit Open






• Turn the ignition OFF.

• Disconnect the TIPM harness connector.

• Measure the resistance of the brake fluid level signal circuit between the brake fluid level switch harness connector and the TIPM harness connector.

Is the resistance less than 5 ohms?

Yes

• Go to Test Step 6.

No

• Repair the open in the signal circuit.

• Perform the ABS Verification Test. Refer to => Non-DTC Based Diagnostics. ABS Verification Test

Test Step 6 - Switch Return Circuit Open






• Reconnect the TIPM harness connector.

• Measure the resistance of the brake fluid level switch return circuit between the brake fluid level switch harness connector and ground.

Is the resistance less than 5.0 ohms?

Yes

• Replace the TIPM.

• Perform the ABS Verification Test. Refer to => Non-DTC Based Diagnostics. ABS Verification Test

No

• Repair the open in the return circuit.

• Perform ABS Verification. Refer to => Non-DTC Based Diagnostics. ABS Verification Test