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

External Controls

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

D1 CHECK 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 depressed to not depressed?

Yes
REFER to Instrument Panel, Gauges and Warning Indicators.

No
GO to D2.

D2 CHECK BCM (Body Control Module) FUSE 42 (5A)

- Ignition OFF.

- Check fuse: Body Control Module (BCM) 42 (5A).

Is the resistance less than 5 ohms?

Yes
GO to D3.

No
GO to D4.

D3 CHECK THE TCS (Transmission Control Switch) POWER CIRCUIT FOR AN OPEN

- Disconnect: Floor Shifter Harness C3245.

- Disconnect: BCM (Body Control Module) Fuse 42 (5A).

- Measure the resistance between floor shifter harness C3245-6, circuit CBP42 (GN) and the output side of BCM (Body Control Module) fuse 42 (5A).

Is the resistance less than 5 ohms?

Yes
GO to D4.

No
REPAIR circuit CBP42 (GN) for an open. CLEAR the DTCs. TEST the system for normal operation.

D4 CHECK THE TCS (Transmission Control Switch) POWER CIRCUIT FOR A SHORT TO GROUND

- Disconnect: C3245.

- Disconnect: BCM (Body Control Module) Fuse 42 (5A).

- Measure the resistance between floor shifter harness C3245-6, circuit CBP42 (GN) and ground.






Is the resistance greater than 10,000 ohms?

Yes
GO to D5.

No
REPAIR circuit CBP42 (GN) for a short to ground. CLEAR the DTCs. TEST the system for normal operation.

D5 CHECK THE TCS (Transmission Control Switch) SIGNAL CIRCUIT FOR AN OPEN

- Disconnect: PCM C175T.

- Measure the resistance between floor shifter harness C3245-5, circuit CET34 (BN/GN) and PCM C175T-31.






Is the resistance less than 5 ohms?

Yes
GO to D6.

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

D6 CHECK THE TCS (Transmission Control Switch) SIGNAL CIRCUIT FOR A SHORT TO GROUND

- Measure the resistance between floor shifter harness C3245-5, circuit CET34 (BN/GN) and ground.






Is the resistance greater than 10,000 ohms?

Yes
GO to D7.

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

D7 CHECK THE TCS (Transmission Control Switch)

- Measure the resistance between floor shifter harness 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
REPLACE the PCM. PROGRAM the PCM with the latest calibration level. PERFORM the solenoid body strategy data download procedure, REFER to Solenoid Body Strategy in Automatic Transmission/Transaxle &/or Transmission Control Systems. TEST the system for normal operation.

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