No Lock-Up Occurs

No Lock-Up Occurs

Symptom Description

TCM turns TCC pressure control solenoid OFF under any of the following conditions.

- Engine coolant temperature is lower than 60 °C (140 °F).
- 4L/N switch (if equipped) is turned ON. (4L or N mode)
- Brake light switch is turned ON. (Brake pedal is depressed)
- TCM detects the following DTCs.
DTC P0602, P0712, P0713, P0717, P0722, P0962, P0963, P0973, P0974, P0976, P0977, P1702, P1706, P2763, P2764, U0073 and/or U0100

Troubleshooting

WARNING:

If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.

- Select a level road with no traffic to minimize the risk of accident.
- Perform the test extremely carefully.
- Perform the road test using 2 persons, a driver and an assistant.

1.
Was "A/T System Check" performed?
YES -
Go to Step 2.
NO -
Go to A/T System Check A/T System Check.

2. Check DTC

Is DTC P0602, P0712, P0713, P0717, P0722, P0962, P0963, P0973, P0974, P0976, P0977, P1702, P1706, P2763, P2764, U0073 or U0100 detected?
YES -
Perform DTC Flow to repair and retry.
NO -
Go to Step 3.

3. ECT check

Warm up engine to normal operating temperature.
Check ECT using scan tool.

Is ECT more than 60 °C (140 °F)?
YES -
- For vehicle equipped with 4L/N switch, go to Step 4.
- For vehicle equipped without 4L/N switch, go to Step 5.
NO -
Faulty ECT sensor, its circuit or engine cooling system. If OK, substitute a known-good TCM and recheck.

4. 4L/N switch signal inspection

With ignition switch ON, check voltage between terminal "E93-4" of TCM connector and ground.

4L/N switch specification
Transfer gear position or "4H": Battery voltage
Transfer gear position "4L" or "N": 0 - 2 V

Is result as specified?
YES -
Go to Step 5.
NO -
Faulty "4L" switch or its circuit. If OK, substitute a known-good TCM and recheck.

5. Brake light switch signal inspection

With ignition switch ON, check voltage between terminal of ECM connector and ground.

Brake light switch specification
Brake pedal is released: 0 - 1 V
Brake pedal is depressed: Battery voltage

Is result as specified?
YES -
Substitute a known-good TCM and recheck.
NO -
Mis-adjusted brake light switch, faulty brake light switch or its circuit. If OK, substitute a known-good TCM and recheck.