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

External Controls

Pinpoint Tests

Refer to Wiring Diagram Set 29, Transmission Controls for schematic and connector information. Diagrams By Number

Refer to Wiring Diagram Set 37, Shift Interlock for schematic and connector information. Diagrams By Number

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

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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
REFER to Exterior Lighting Testing and Inspection.

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A2 TEST THE BSIA POWER CIRCUIT

- Disconnect: Selector Lever Harness C3245.
- Ignition ON.
- Measure the voltage between selector lever harness C3245-1, circuit CCA26 (BU/GY), vehicle harness side and ground, while applying the brake pedal.




- Is the voltage greater than 10 volts?

Yes
GO to A3.

No
REPAIR circuit CCA26 (BU/GY) for an open.

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A3 TEST THE TCM

- Ignition OFF.
- Measure the resistance between selector lever harness C3245-5 circuit GD115 (BK/GY) and ground.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new selector lever. REFER to Selector Lever Selector Lever.

No
GO to A4.

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A4 TEST THE BSIA GROUND CIRCUIT

- Disconnect: Transmission Control Module (TCM) C1ET02.
- Measure the resistance between selector lever harness C3245-12 and C1ET02-49.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new TCM.

No
REPAIR circuit CET53 (BU/OG) for an open.

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