Monitors, Trips, Drive Cycles and Readiness Codes

Transmission Drive Cycle Test

NOTE: Always drive the vehicle in a safe manner according to driving conditions and obey all traffic laws.

NOTE: The Transmission Drive Cycle Test must be followed exactly. Malfunctions must occur 4 times consecutively for a shift error DTC to set, and 5 times consecutively for continuous Torque Converter Clutch (TCC) code to set.

NOTE: When carrying out the Transmission Drive Cycle Test, refer to the Solenoid Application Chart for correct solenoid operation.

After carrying out the Self Test, use the Transmission Drive Cycle Test for checking continuous codes.

1. Record and then clear Self Test DTCs.

2. Warm engine to normal operating temperature.

3. Make sure transmission fluid level is correct.

4. With the selector lever in (D), moderately accelerate from stop to 80 km/h (50 mph). This allows the transmission to shift into 4th gear. Hold speed and throttle open steady for a minimum of 15 seconds.

5. With the transmission in 4th gear and maintaining steady speed and throttle opening, lightly apply and release the brake pedal to operate the stoplamps. Then hold speed and throttle steady for a minimum of 5 seconds.

6. Brake to a stop and remain stopped for a minimum of 20 seconds.

7. Repeat Steps 4 through 6 at least 5 times.

8. Carry out Self Test and record continuous DTCs.
- If the DTCs are still present, refer to the DTC Chart 4R70E/4R75E. Repair all non-transmission DTCs first as they can directly affect the operation of the transmission. Repeat the Self Test and the Road Test to verify the correction. Clear the DTCs, carry out the Drive Cycle Test and repeat the Self Test after completing repair on the DTC.

- If the continuous test passes and a concern is still present, refer to Diagnosis By Symptom Diagnosis By Symptom and TSBs for concerns.


After On-Board Diagnostic (OBD)

NOTE: The vehicle wiring harness, PCM and non-transmission sensors may affect transmission operations. Repair these concerns first.

After the On-Board Diagnostic (OBD) tests are completed, repair all DTCs.

Begin with non-transmission related DTCs, then repair any transmission related DTCs. Use the DTC Chart for information on condition and symptoms. This chart will be helpful in referring to the correct information and aids in diagnosing internal transmission concerns and external non-transmission inputs. The pinpoint tests are used in diagnosing transmission electrical concerns. Make sure that the vehicle wiring harness and the PCM are diagnosed as well. The Computers and Control Systems will aid in diagnosing non-transmission electronic components.


Before Pinpoint Tests

WARNING: If equipped with fire suppression system, refer to Fire Suppression System for Important Safety Warnings. Failure to follow this instruction may result in serious personal injury. Description and Operation

NOTE: Prior to entering pinpoint tests, check the PCM wiring harness connectors and in-line connectors for tight connections, bent or broken terminals, corrosion, loose wires, correct routing, correct seals and their condition. Check the PCM, sensors and actuators for damage. Refer to Computers and Control Systems.

NOTE: If a concern still exists after electrical diagnosis has been carried out, refer to Diagnosis By Symptom Diagnosis By Symptom.

If DTCs appear while carrying out the OBD test, refer to the Diagnostic Trouble Code (DTC) Charts 4R70E/4R75E for the appropriate repair procedure. Prior to entering pinpoint tests, refer to any TSBs for transmission concerns.