Because the PCM has the ability to adapt to various transaxle conditions,
it is necessary to reset the adaptive parameters after certain repairs have been performed.
The adaptives can be reset using the Service Stall System (SSS) or using a Scan tool.
The adaptives should only be reset after the following repairs have been made:
• | Replacing a TCC or PC solenoid |
• | Transaxle overhaul when new clutch plates are installed |
• | Replacing the PCM for a transaxle related failure |
Important: When replacing the PCM for an engine related problem the transaxle adaptives
should be transferred from the old PCM to the new PCM.
After performing a repair, the vehicle must be driven to allow the adaptives
to learn new shift times and pressures before returning the vehicle to a customer.
Refer to Learn-In procedure below.
Learn-In Procedure
If one of the repairs mentioned has been performed, then the adaptives should
be reset using the SSS or using a Scan tool. Also, the vehicle must be driven, preferably
on a highway, according to the following steps. By following these steps, the adaptives
will be properly learned prior to returning the vehicle to the customer.
- Warm up the transaxle fluid temperature above 45°C (113°F).
- Perform 10 sets of upshift (1-2, 2-3, 3-4) at 30% throttle:
- | While coasting at 56 km/h (35 mph) slowly accelerate to half throttle
to achieve a 4-3 downshift. |
- | With selector in D3 while coasting at 32 km/h (20 mph) slowly accelerate
to 75% throttle to achieve a 3-2 downshift. |
- | Repeat both procedures five times. |
- | While coasting at 64 km/h (40 mph) slowly accelerate to half throttle
to achieve a 4-3 downshift. |
- | With selector in D3 while coasting at 48 km/h (30 mph) slowly accelerate
to one half throttle to achieve a 3-2 downshift. |
- | Repeat both procedures five times. |