Slipping Or Not Engaged

Checking The Transmission Control Module
- Check that the transmission control module (TCM) has the correct P/N. Compare the transmission control module P/N with the engine and transmission specifications.
- Is the transmission control module P/N correct?

Yes:
- Proceed to: Connecting The Test Box section below.

No:
- Proceed to: Replacing Component section below.

Replacing Component
- Try a new transmission control module.
- Proceed to: Test Driving section below.

Connecting The Test Box
- Ignition OFF.
- Connect the test box and check ground terminals.
- Proceed to: Checking Resistance In Solenoid SL Circuit section below.

Checking Resistance In Solenoid SL Circuit
- Ignition OFF.
- Transmission control module disconnected.
- Test box connected.
- Connect an ohmmeter between # 2 and # 15 on test box.
- The ohmmeter should read 12-18 Ohms.

If reading is OK:
- Proceed to: Test Driving section below.

If reading is incorrect:
- Proceed to: Checking For Contact Resistance And Oxidation section below.

Checking For Contact Resistance And Oxidation
- Check transmission and transmission control module connectors for contact resistance and oxidation and remedy.
- Proceed to: Test Driving section below.

Test Driving
- Ignition OFF.
- Reconnect connectors, reinstall components.
- Read off diagnostic trouble code (DTC) counter and note value.
- Test drive car according to Test Drive Form.
- For the driving conditions required to engage and disengage lock-up. Lock-Up
- The transmission should have normal operating temperature when test driving because lock-up engagement is dependent on the temperature of the oil in the transmission.

NOTE: Do not switch OFF ignition.

- Read off diagnostic trouble code counter with-out switching OFF the ignition.
- Is counter value greater than 0?

Yes:
- Fault corrected.

No:
- Proceed to: Checking Mechanical Faults section below.

Checking Mechanical Faults
- Check and remedy mechanical transmission faults.
- Proceed to: Test Driving section above.