Pinpoint Test C : The TCS (Transmission Control Switch) Is Inoperative

External Controls

Pinpoint Tests

Refer to Wiring Diagram Set 37, Shift Interlock for schematic and connector information [1][2]Diagrams By Number.

Refer to Wiring Diagram Set 30, Switch Transmission - 6R80 for schematic and connector information [1][2]Diagrams By Number.

PINPOINT TEST C : THE TCS (Transmission Control Switch) IS INOPERATIVE

C1 CHECK VOLTAGE TO THE TCS (Transmission Control Switch)

- Ignition OFF.

- Disconnect: Selector Lever C307.

- Ignition ON.

- Measure the voltage between selector lever C307-5, circuit CBB46 (WH/BU), harness side and ground.





Is the voltage greater than 10 volts?

Yes
GO to C2.

No
REPAIR circuit CBB46 (WH/BU). TEST the system for normal operation.

C2 CHECK TCS (Transmission Control Switch) FUNCTION

- 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 (Transmission Control Switch) applied and greater than 10,000 ohms with the TCS (Transmission Control Switch) released?

Yes
GO to C3.

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

C3 CHECK TCS (Transmission Control Switch) INPUT CIRCUIT FOR AN OPEN

- Ignition OFF.

- Disconnect: PCM C175B.

- Measure the resistance between selector lever C307-6, circuit CET34 (BN/GN), harness side and PCM C175B-29, circuit CET34 (BN/GN), harness side.





Is the resistance less than 5 ohms?

Yes
GO to C4.

No
REPAIR circuit CET34 (BN/GN) for an open. TEST the system for normal operation.

C4 CHECK TCS (Transmission Control Switch) INPUT CIRCUIT FOR A SHORT TO GROUND

- Measure the resistance between selector lever C307-6, circuit CET34 (BN/GN), harness side and ground.





Is the resistance greater than 10,000 ohms?

Yes
INSTALL a new PCM. PROGRAM the PCM with the latest calibration level. PERFORM the solenoid strategy download procedure. REFER to solenoid body strategy in Automatic Transmission/Transaxle &/or Transmission Control Systems Solenoid Body Strategy. TEST the system for normal operation.

No
REPAIR circuit CET34 (BN/GN) for a short to ground. TEST the system for normal operation.