Pinpoint Test B: Select Shift Does Not Operate / Overdrive (O/D) Does Not Cancel

External Controls

Pinpoint Tests

PINPOINT TEST B: SELECT SHIFT DOES NOT OPERATE / OVERDRIVE (O/D) DOES NOT CANCEL

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B1 CHECK CIRCUITS CET43 (GY) AND CET42 (GN/VT) INPUT TO THE PCM


- Ignition ON.
- Move the selector lever to the "M" position.




- Disconnect: PCM C175T.
- Measure the resistance between PCM C175T-42, circuit CET43 (GY), harness side and ground.




- Measure the resistance between PCM C175T-44, circuit CET42 (GN/VT), harness side and ground.




- Are the resistances less than 5 ohms?

Yes
GO to B4.

No
GO to B2.

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B2 CHECK TRANSMISSION SELECT SHIFT CIRCUITS FOR OPEN


- Disconnect: Selector Lever Harness C3245.
- Measure the resistance between selector lever C3245-5, harness side and ground.




- Measure the resistance between selector lever C3245-9, harness side and ground.




- Are the resistances less than 5 ohms?

Yes
GO to B3.

No
REPAIR the circuits. TEST system for normal operation.

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B3 CHECK CIRCUITS CET43 (GY) AND CET42 (GN/VT) FOR OPEN


- Measure the resistance between selector lever C3245-7, circuit CET43, harness side and PCM C175T-42.




- Measure the resistance between selector lever C3245-8, circuit CET43, harness side and PCM C175T-44.




- Are the resistances less than 5 ohms?

Yes
INSTALL a new selector lever. TEST the system for normal operation.

No
REPAIR the circuits. TEST the system for normal operation.

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B4 CHECK CIRCUITS CET43 (GY) AND CET42 (GN/VT) FOR SHORT TO GROUND


- Disconnect: Selector Lever Harness C3245.
- Measure the resistance between PCM C175T-42, circuit CET43 (GY), harness side and ground.




- Measure the resistance between PCM C175T-44, circuit CET42 (GN/VT), harness side and ground.




- Are the resistances greater than 10,000 ohms?

Yes
GO to B5.

No
REPAIR circuit. TEST system for normal operation.

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B5 CHECK THE TRANSMISSION SELECTOR LEVER SELECT SHIFT SWITCHES


- Connect: Selector Lever Harness C3245.
- Measure the resistance between PCM C175T-42, circuit CET43 (GY), harness side and ground while moving the selector lever to the " + (ON)" back to "M" (OFF) positions.




- Measure the resistance between PCM C175T-44, circuit CET42 (GN/VT), harness side and ground while moving the selector lever to the " - (ON)" back to "M" (OFF) positions.




- Is the resistance less than 5 ohms with the switch ON and greater than 10,000 ohms with the switch OFF?

Yes
INSTALL a new PCM.

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

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