For 1990-2009 cars

### 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 Testing for Electrical Intermittents , Testing for Intermittent Conditions and Poor Connections , Wiring Repairs and Connector Repairs in Wiring Systems.

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 | Go to Diagnostic System Check - Park Brake
2 |

1. Cycle the park brake switch.
2. Observe the actuator for movement.

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 |

1. Disconnect and remove the park brake linkage travel switch from the actuator.
2. Use a DMM in order to measure the resistance of the park brake linkage travel switch.

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 |

1. Disconnect the park brake control module connector.
2. Use a DMM in order to test the service park brake indicator supply voltage 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 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 |

1. Reconnect all the connectors.
2. Clear DTCs. Refer to Diagnostic Trouble Code (DTC) Clearing .
3. Operate the park brake.
4. Verify that no DTCs reset. Refer to Diagnostic Trouble Code (DTC) Displaying .

Did the same DTC reset?

--

Go to Step 2

Go to Step 11

11 | Did any DTCs reset? | -- | Go to Diagnostic Trouble Code (DTC) List | System OK