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 (NC 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 Specification: 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 Specification: 1.5 seconds or less
If "N" > "R" time lag is longer than specification:
^ Line pressure too low
^ Reverse brake worn