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Pinpoint Test B: TCS Does Not Operate Correctly (MKZ Only)




External Controls

Pinpoint Tests

PINPOINT TEST B: TCS DOES NOT OPERATE CORRECTLY (MKZ ONLY)

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B1 TEST THE IC


- 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 B2.

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B2 TEST THE SELECTOR LEVER GROUND CIRCUIT FOR AN OPEN


- Disconnect: Selector Lever Harness C3233.
- Measure the resistance between selector lever harness C3233-5, circuit GD116 (BK/VT), vehicle harness side and ground.




- Is the resistance less than 5 ohms?

Yes
GO to B3.

No
REPAIR the selector lever ground circuit for an open. TEST the system for normal operation.

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B3 TEST THE TCS CIRCUIT FOR AN OPEN


- Disconnect: Transmission Control Module (TCM) C1533.
- Measure the resistance between selector lever harness C3233-6, circuit CET34 (BN/GN), vehicle harness side and TCM C1533-7 circuit CET34 (BN/GN), vehicle harness side.




- Is the resistance less than 5 ohms?

Yes
GO to B4.

No
REPAIR the circuit for an open. TEST the system for normal operation.

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B4 TEST THE TCS CIRCUIT FOR A SHORT TO GROUND


- Measure the resistance between selector lever harness C3233-6, circuit CET34 (BN/GN), vehicle harness side and ground.




- Is the resistance greater than 10,000 ohms?

Yes
GO to B5.

No
REPAIR the circuit for a short to ground. TEST the system for normal operation.

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B5 TEST THE TCS


- Measure the resistance between selector lever harness C3233-5 and C3233-6, component side, while cycling the TCS.




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

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

No
INSTALL a new selector lever knob. REFER to Selector Lever Knob - 3.5L Selector Lever Knob. TEST the system for normal operation.

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