Time Lag Test: Inspection

NOTE: When the select lever is shifted while the engine is idling, there will be a certain time elapse or lag before shock is felt. Using this, check the condition of forward brake, reverse brake, 1st one-way clutch and 3rd one-way clutch.

Perform the test at normal operation fluid temperature of 70 - 80°C (158 - 176°F).
Be sure to allow a one minute interval between tests.
Make three measurements and take the average value.

Fully apply the parking brake.
Start the engine.
Check the idle speed (A/C OFF).
Shift the select lever from "N" to "D" range. Using a stop watch, measure the time-lag from shifting the lever until the shock is felt.
Time-lag

Specification: 1.2 sec. or less

If "N" → "D" time-lag is longer than specification:
- Line pressure too low
- Forward brake worn
- One-way clutch not operating properly
In the same manner, measure the time lag of "N" ↔ "R".
Time-lag

Specification: 1.5 sec. or less

If "N" → "R" time lag is longer than specification:
- Line pressure too low
- Reverse brake worn