Transaxle Drive Cycle Test
Transaxle Drive Cycle Test
NOTE: Always drive the vehicle in a safe manner according to driving conditions and obey all traffic laws.
After carrying out the self-test, use the following Transmission Drive Cycle Test for checking continuous codes:
NOTE: The Transmission Drive Cycle Test must be followed exactly. Malfunctions must occur 4 times consecutively for the shift error DTC to be set. Torque converter failures must occur 5 times consecutively for a continuous DTC to be set.
NOTE: When carrying out the Transmission Drive Cycle Test, see the Solenoid Operation Chart for correct solenoid operation. Refer to Pinpoint Tests - OSC Equipped Vehicle Automatic Transaxle/Transmission - 6F35.
1. Record then clear self-test DTCs.
2. Warm engine to normal operating temperature.
3. Make sure transmission fluid level is correct.
4. With transmission in DRIVE, moderately accelerate from stop to 80 km/h (50 mph). This allows the transmission to shift into 6th gear. Hold speed and throttle opening steady for a minimum of 15 seconds.
5. With transmission in 6th gear and maintaining steady speed and throttle opening, lightly apply and release the brake to operate the stoplamps. Hold speed and throttle steady for additional 5 seconds minimum.
6. Brake to a stop and remain stopped for minimum of 20 seconds.
7. Repeat Steps 4 through 6 at least 5 times.
8. Carry out the self-test and record continuous codes.
- If DTCs are present, refer to Diagnostic Trouble Code (DTC) Charts . Service all non-transmission DTCs first as they can directly affect the operation of the transmission. Repeat the self-test and road test the vehicle to verify the correction. Clear the DTCs, carry out drive cycle and repeat the self-test after completing service on the DTCs.
- If the self-test passes and a concern is still present, refer to Diagnosis By Symptom Diagnosis By Symptom. Check TSBs for diagnostic concern.
After OBD (On-Board Diagnostic)
NOTE: The vehicle wiring harness, TCM (Transmission Control Module) and non-transmission sensors may affect transmission operations. Service these concerns first.
After the OBD (On-Board Diagnostic) procedures are complete, service all DTCs.
Begin with non-transmission related DTCs, then service any transmission related DTCs. Refer to the Diagnostic Trouble Code (DTC) Charts for information on condition and symptoms. This chart is helpful referring to the correct manual(s) and to aid in diagnosing internal transmission concerns and external non-transmission inputs. The pinpoint tests are used in diagnosing electrical concerns of the transmission. Make sure the vehicle wiring harness and TCM (Transmission Control Module) are diagnosed as well. Refer to Computers and Control Systems Information for diagnosing non-transmission electronic components. The diagnostic routine hydraulic/mechanical charts will help in diagnosing internal transmission concerns and external non-transmission inputs.
Before Pinpoint Tests
NOTE: Prior to entering pinpoint tests, check the TCM (Transmission Control Module) wiring harness for correct connections, bent or broken terminals, corrosion, loose wires, correct routing, correct seals and their condition. Check the TCM (Transmission Control Module) , sensors and actuators for damage. Refer to Computers and Control Systems Information.
NOTE: If a concern exists after the electrical diagnosis has been carried out, refer to Diagnosis By Symptom Diagnosis By Symptom.
If DTCs appear while carrying out the OBD (On-Board Diagnostic) test, refer to the Diagnostic Trouble Code (DTC) Charts for the appropriate repair procedure. Prior to entering pinpoint tests, refer to TSBs for transmission concerns.