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. This is used for checking the condition of the low clutch, reverse clutch, low & reverse brake and one-way clutch.

Perform the test at normal operation fluid temperature of 70 - 80°C (158 - 176°F).
Be sure to allow one minute or more 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 which takes from shifting the lever until the shock is felt.
Time lag

Specification: 1.2 seconds or less

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

Specification: 1.5 seconds or less

If "N" → "R" time lag is longer than specified:
- Line pressure too low
- Reverse clutch worn
- Low & reverse brake worn
- D-ring worn