Operational Test Description

DESCRIPTION
Operational Test procedures are provided to serve as pre-Road Test checks. With the engine running in the service bay, the Operational Tests are conducted in minimal time, and with less effort than the Road Tests require. They are used to determine the causes of (and provide the corrective actions for) transaxle malfunctions most likely to occur. These include the torque converter, the power train, the friction elements (clutches and bands), the hydraulic system, and the associated regulating valves and controls.

PROCEDURE
1. Check the following items:
a. Coolant level and condition
b. Automatic transmission fluid (ATF) level and condition
c. Idle speed
2. Prepare the vehicle:
a. Run engine to warm up the automatic transmission fluid (ATF) to normal operating temperature, 60-70°C (140-160°F).
b. While the engine is idling, shift the gearshift lever from PARK (P) to MANUAL LOW (1), then shift back to PARK, while stopping in every gear position.
c. Place the gearshift lever firmly in the PARK (P) position.
d. Block the wheels.
e. Apply the parking brake.
3. Perform each Operational Test and use the corresponding Evaluation Chart for direction.