Time Lag Test
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 1994 Toyota MR2, 1993 Toyota MR2, 1993 Toyota Celica, 1992 Toyota MR2, and 1992 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Perform this test at normal operating fluid temperature of 122-176°F (50-80°C). Allow a one minute interval between tests. Make 3 measurements and take the average value.
- If shift lever is actuated with engine idling, a time lag will be noted before shock can be felt. This test is used for checking condition of overdrive clutch, forward clutch, direct clutch, and 1st and reverse brake.
- Apply parking brake. Start engine. Ensure idle speed is correct. See IDLE SPEED SPECIFICATIONS table. Shift transmission from "N" into "D" range. Use a stop watch to measure elapsed time between shifting of lever until shock is felt. Standard time lag is less than 1.2 seconds.IDLE SPEED SPECIFICATIONS
Application RPM A-241E 4A-GZE Engine 800 5S-FE Engine 700-750 A-241H 750-900 A-241L 700-750 A-243L 750-850 - Repeat procedure outlined in step 2) to measure time lag for "N" to "R". Standard lag is less than 1.5 seconds.
- If "N" to "D" time lag is longer than specification, line pressure is too low, forward clutch may be worn, or overdrive one-way clutch is not operating properly.
- If "N" to "R" time lag is longer than specified, direct clutch may be worn, 1st and reverse brake may be worn, line pressure is too low or overdrive one-way clutch is not operating properly.