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 the entire time the pump is running.
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 | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Park Brake System Schematics | ||||
1 | Did you perform the Park Brake Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the actuator extend normally? | -- | Go to Step 3 | Go to Step 9 |
3 | Check the park brake for proper adjustment. Refer to Park Brake Adjustment . Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 4 |
4 |
Is the resistance more than the stated value? | 1 ohms | Go to Step 5 | Go to Step 6 |
5 | Replace the park brake linkage travel switch. Refer to Park Brake Travel Switch Replacement . Is the repair complete? | -- | Go to Step 10 | -- |
6 |
Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 7 |
7 | Use a DMM in order to test the park brake linkage travel switch ground circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 8 |
8 | Replace the park brake control module. Refer to Park Brake Control Module Replacement . Is the repair complete? | -- | Go to Step 10 | -- |
9 | Perform the Park Brake Pressure Sensor Circuit Check test. Refer to Park Brake Pressure Sensor Circuit Check . Is the repair complete? | -- | Go to Step 10 | -- |
10 |
Did the same DTC reset? | -- | Go to Step 2 | Go to Step 11 |
11 | Did any DTCs reset? | -- | System OK | |
