Time Lag Test
Time Lag TestINSPECTION
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 one minute or more interval between tests.
^ Make three measurements and take the average value.
1) Fully apply the parking brake.
2) Start the engine.
Check the idle speed. (A/C OFF)
3) 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
Standard: 1.2 seconds or less
If "N" -> "D" time-lag is longer than specification:
^ Line pressure too low
^ Forward brake worn
^ One-way clutch not operating properly
4) In the same manner, measure the time lag of "N" -> "R".
Time-lag
Standard: 1.5 seconds or less
If "N" -> "R" time lag is longer than specification:
^ Line pressure too low
^ Reverse brake worn