Pinpoint Test A: The Brake Shift Interlock System Does Not Release/Lock Correctly

External Controls


Pinpoint Tests


PINPOINT TEST A: THE BRAKE SHIFT INTERLOCK SYSTEM DOES NOT RELEASE/LOCK CORRECTLY

NOTE: Perform a thorough inspection of the selector lever cable before proceeding with this pinpoint test.

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A1 TEST THE BRAKE LIGHTS


- Apply the brake pedal and view the brake lights.
- Do the brake lights illuminate?

Yes
GO to A2.

No
Go to Brake Lamp. Testing and Inspection

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A2 TEST CIRCUIT CBB08 (VT/WH) FOR AN OPEN


- Disconnect: Brake Shift Interlock Actuator (BSIA) C2127.
- Inspect C2127 for damaged or pushed-out pins, corrosion or loose wires. Repair as necessary.
- Measure the voltage from C2127-3, circuit CBB08 (VT/WH), harness side and ground while applying the Brake Pedal Position (BPP) switch.




- Is the voltage greater than 10 volts when applied?

Yes
GO to A3.

No
REPAIR circuit CBB08 (VT/WH) for an open. TEST the system for normal operation.

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A3 TEST CIRCUIT GD114 (BK/BU) FOR AN OPEN


- Measure the resistance of BSIA C2127-1, circuit GD114 (BK/BU), harness side and ground.




- Is the resistance 5 ohms or less?

Yes
INSTALL a new BSIA. TEST the system for normal operation.

No
REPAIR circuit GD114 (BK/BU) for an open. TEST the system for normal operation.

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