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

External Controls

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

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

B1 TEST THE IPC (Instrument Panel Cluster)

- Connect the scan tool.

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

Does the TCS_DEPRES PID cycle from DEPRESSED to NOT DEPRESSED?

Yes
REFER to Instrument Panel, Gauges and Warning Indicators.

No
GO to B2.

B2 CHECK CJB (Central Junction Box) FUSE 22 (7.5A)

- Ignition OFF.

- Check fuse: Central Junction Box (CJB) 22 (7.5A).

Is the resistance less than 5 ohms?

Yes
GO to B3.

No
GO to B4.

B3 CHECK FOR VOLTAGE AT THE SELECTOR LEVER CONNECTOR

- Disconnect: Selector Lever Harness C3245.

- Ignition ON.

- Measure the voltage between selector lever harness C3245-6, circuit CBP22 (GN/OG), vehicle harness side and ground.





Is the resistance less than 5 ohms?

Yes
GO to B4.

No
REPAIR circuit CBP22 (GN/OG). RECONNECT all components. TEST the system for normal operation.

B4 TEST THE TCS (Transmission Control Switch)

- Measure the resistance between selector lever harness C3245 pins 6 and 7, 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
GO to B5.

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

B5 TEST THE TCS (Transmission Control Switch) SIGNAL CIRCUIT FOR A SHORT TO GROUND

- Ignition OFF.

- Disconnect: Transmission Control Module (TCM) C1ET02.

- Measure the resistance between selector lever harness C3245-7, circuit CE417 (GY/BN) and ground.





Is the resistance greater than 10,000 ohms?

Yes
GO to B6.

No
REPAIR circuit CE417 (GY/BN) for a short to ground. TEST the system for normal operation.

B6 TEST THE TCS (Transmission Control Switch) SIGNAL CIRCUIT FOR AN OPEN CIRCUIT

- Measure the resistance between selector lever harness C3245-7, circuit CE417 (GY/BN) and TCM (Transmission Control Module) C1ET02-11.





Is the resistance greater than 10,000 ohms?

Yes
INSTALL a new TCM (Transmission Control Module).

No
REPAIR circuit CE417 (GY/BN) for an open. RECONNECT all components. TEST the system for normal operation.