Monitors, Trips, Drive Cycles and Readiness Codes

Transmission Drive Cycle Test

NOTE: The Transmission Drive Cycle Test must be followed exactly. Malfunctions must occur four times consecutively for codes P0731, P0732, P0733 and P0734 to be set, and five times consecutively for continuous codes P0741 and P0743.

After performing the Quick Test, use the Transmission Drive Cycle Test for checking continuous codes.

1. Record and then erase Quick Test codes.

2. Warm engine to normal operating temperature.

3. Make sure transmission fluid level is correct.

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

5. With transmission in fourth gear and maintaining steady speed and throttle opening, lightly apply and release brake pedal (2455) (to operate stoplamps). Then hold speed and throttle steady for an additional five seconds (minimum).

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

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

8. Perform Quick Test and record continuous codes.

If DTCs are present, go to the Diagnostic Trouble Code Description Chart for service information. Service all non-transmission DTCs first as they can directly affect the operation of the transmission. Repeat the Quick Test and Road Test to verify the correction. Erase DTCs, perform Drive Cycle and repeat the Quick Test after completing service on the DTCs. Pinpoint Tests

If the continuous test passes and a concern is still present, refer to the Diagnosis by Symptom charts, OASIS and TSBs for concern diagnostics. Symptom Related Diagnostic Procedures