Pinpoint Test B : TCS (Transmission Control Switch) Does Not Operate Correctly

External Controls

Pinpoint Tests

PINPOINT TEST B : TCS (Transmission Control Switch) DOES NOT OPERATE CORRECTLY

B1 TEST THE IC (Instrument Cluster)

- Connect the scan tool.

- Using the scan tool, monitor the TCS PID while cycling the Transmission Control Switch (TCS).

Does the TCS PID cycle from closed to open?

Yes
REFER to Instrument Panel, Gauges and Warning Indicators.

No
GO to B2.

B2 CHECK FOR VOLTAGE SUPPLY AT THE SELECTOR LEVER CONNECTOR

- Disconnect: Selector Lever Harness C3245.

- Start the engine.

- Measure the voltage at selector lever C3245-6.





Is the voltage greater than 10 volts?

Yes
GO to B3.

No
REPAIR circuit CBB46 (WH/BU) for an open. RECONNECT all components. TEST the system for normal operation.

B3 TEST THE TCS (Transmission Control Switch) SIGNAL CIRCUIT FOR AN OPEN

- Disconnect: PCM C175B.

- Measure the resistance between selector lever harness C3245-5, circuit CET34 (BN/GN) and PCM C175B-16, circuit CET34 (BN/GN).





Is the resistance less than 5 ohms?

Yes
GO to B4.

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

B4 TEST THE TCS (Transmission Control Switch)

- Measure the resistance between selector lever C3245-5 and C3245-6, component side, while cycling the TCS (Transmission Control Switch).





Is the resistance less than 5 ohms when pressed and greater than 10,000 ohms when released?

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

No
INSPECT the selector lever wiring harness for damage and REPAIR as necessary. If the selector lever wiring harness is not damaged, INSTALL a new selector lever knob. REFER to Selector Lever Knob . TEST the system for normal operation.