Circuit Description
The travel switch opens if the actuator movement is excessive while the park brake is being applied. An open travel switch indicates the park brake is out of adjustment.
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The parking brake is being released. |
Conditions for Setting the DTC
The PBCM detects an open travel switch until system pressure is at least 6200 kPa (900 psi).
Action Taken When the DTC Sets
| • | The SERVICE PARK BRAKE indicator turns ON. |
| • | Electro-hydraulic park brake function may be disabled. |
Conditions for Clearing the DTC
The conditions for setting the DTC are no longer present and you use the procedure specified in Diagnostic Trouble Code (DTC) Clearing .
Diagnostic Aids
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to the following:
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Park Brake System Schematics | |||
1 | Did you perform the Park Brake Diagnostic System Check? | Go to Step 2 | |
2 | Check the park brake for proper adjustment. Refer to Park Brake Adjustment . Did you find and correct the condition? | Go to Step 5 | Go to Step 3 |
3 |
Did the actuator piston rod have a full stroke? | Go to Step 4 | |
4 | Replace the park brake pump assembly. Refer to Park Brake Pump Replacement . Did you complete the repair? | Go to Step 5 | -- |
5 |
Did the same DTC reset? | Go to Step 2 | Go to Step 6 |
6 | Did any DTCs reset? | System OK | |
