Pinpoint Tests

Pinpoint Tests

PINPOINT TEST A : THE PARKING BRAKE WILL NOT ENGAGE

A1 : CHECK FOR INCORRECTLY ADJUSTED REAR PARKING BRAKE CABLE
1 Carry out parking brake cable adjustment procedure. For additional information, refer to Parking Brake Cable Adjustment Adjustments
- Does the parking brake now engage correctly?

->Yes
Vehicle OK.

->No
GO to Pinpoint Test G874432t2.

A2 : CHECK FOR WORN PARKING BRAKE SHOES
1 Inspect the rear parking brake shoes for excessive wear.
- Are parking brake shoes OK?

->Yes
GO to Pinpoint Test G874432t3.

->No
INSTALL new parking brake shoes. For additional information, refer to Parking Brake Shoes Removal and Replacement Test the system for normal operation.

A3 : CHECK FOR DAMAGED PARKING BRAKE CABLES
1 Inspect the parking brake components, cables and conduit for damage, rust or fraying.
- Are the parking brake components, cables and conduits OK?

->Yes
CHECK for other causes such as loose parking brake control or system components.

->No
REPAIR or INSTALL new components, cables and conduit as necessary. For additional information, refer to Parking Brake Front Cable Parking Brake Front Cable
For additional information, refer to Parking Brake Rear Cables Parking Brake Rear Cables TEST the system for normal operation.

PINPOINT TEST B : THE PARKING BRAKE WILL NOT RELEASE

B1 : CHECK PARKING BRAKE CONTROL

NOTE:
Ensure correct adjustment of parking brake shoes prior to test.
1 Raise and support the vehicle with the parking brake fully applied. For additional information, refer to Lifting
2 Release the parking brake by pulling upwards on the control lever and pushing the release button.
- Did the parking brake control release?

->Yes
CHECK for other causes such as conventional brake system components, REPAIR or INSTALL new components as necessary.

->No
GO to Pinpoint Test G874432t5.

B2 : CHECK PARKING BRAKE CABLES
1 Loosen the parking brake cable tension.
- Rotate the wheels by hand.
- Did the rear wheels rotate OK?

->Yes
CHECK and INSTALL a new parking brake control as required. For additional information, refer to Parking Brake Control Service and Repair TEST the system for normal operation.

->No
GO to Pinpoint Test G874432t7.

B3 : CHECK REAR PARKING BRAKE CABLES
1 Disconnect the parking brake rear cable from the vehicle and check for binding/sticking.
- Did the parking brake rear cable show signs of binding/sticking?

->Yes
INSTALL a new rear parking brake cable. For additional information, refer to Parking Brake Rear Cables Parking Brake Rear Cables TEST the system for normal operation.

->No
Check for parking brake component or rear brake caliper failures.