Pinpoint Test C: The TCS Is Inoperative

External Controls

Pinpoint Tests

PINPOINT TEST C: THE TCS IS INOPERATIVE

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C1 CHECK THE VOLTAGE TO THE TCS


- Ignition OFF.
- Disconnect: Transmission Selector Lever C307.
- Ignition ON.
- Measure the voltage between transmission selector lever C307-5, circuit 1862 (VT/WH), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to C2.

No
REPAIR circuit 1862 (VT/WH). TEST the system for normal operation.

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C2 CHECK THE TCS


- Measure the resistance between selector lever C307-5 and C307-6, component side, while applying and releasing the Transmission Control Switch (TCS).




- Is the resistance less than 5 ohms with the TCS applied and greater than 10,000 ohms with the TCS released?

Yes
GO to C3.

No
INSTALL a new selector lever knob. TEST the system for normal operation.

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C3 CHECK CIRCUIT 224 (TN/WH) FOR AN OPEN


- Ignition OFF.
- Disconnect: PCM C175B.
- Measure the resistance between selector lever C307-6, circuit 224 (TN/WH), harness side and PCM C175B-29, circuit 224 (TN/WH), harness side.




- Is the resistance less than 5 ohms?

Yes
GO to C4.

No
REPAIR circuit 224 (TN/WH) for an open. TEST the system for normal operation.

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C4 CHECK CIRCUIT 224 (TN/WH) FOR A SHORT TO GROUND


- Measure the resistance between selector lever C307-6, circuit 224 (TN/WH), harness side and ground.




- Is the resistance greater than 10,000 ohms?

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

No
REPAIR circuit 224 (TN/WH) for a short to ground. TEST the system for normal operation.

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