Road Testing Vehicle

Shift Point Road Test 

Upshift Gear Sequence 

At times the 10-speed transmission may skip  gears when the vehicle starts from a complete stop. This is normal  and desired  behavior.

At part pedal when acceleration is brisk, single step upshifts would result in very frequent shift events (very short time in each gear). Double step upshifts result in a longer time spent in each gear.

However, at light pedal and at heavy pedal, single step upshifts will  occur. At light pedal, the small 10-speed gear steps allow the engine speed to drop to lower values than it would in the 6-speed transmission, providing for the best fuel economy. In contrast, at heavy or max pedal, the small 10-speed gear steps keep the engine closer to the horsepower peak for best performance.

Downshift Gear Sequence 

At times the 10-speed transmission may skip  gears when the vehicle down shifts to a complete stop. This is normal  and desired  behavior.

The same skip  shift strategy that is used for the upshift may be applied during down shift.

Road Test 

Most performance based automatic transmission diagnostic trouble codes (DTCs) require the fault to be detected multiple times before setting a DTC. In many instances the faults musts be detected consecutively a predetermined number of times (up to five). Carrying out the shift point road test as detailed below increases the likelihood that a DTC will set if a fault is present in the system.

1. Bring the engine and transmission up to normal operating temperature.
2. Operate the vehicle with the selector lever in the D position.
3. From a stop, accelerate the vehicle to 100 km/h (62 mph) with the shifts occurring at approximately 2000 rpm. Stay in 10th gear for 30 seconds or until the TCC applies. Repeat this two times.
4. From a stop, accelerate the vehicle to 100 km/h (62 mph) with the shifts occurring at approximately 3000 rpm. Stay in 10th gear for 30 seconds or until the TCC applies. Repeat this two times.
5. If the transmission fails to upshift/downshift, REFER to: Diagnosis By Symptom .

Shift Speed Chart