Time Lag Test
- Perform mechanical system test preparation. (See MECHANICAL SYSTEM TEST PREPARATION .)
- Start the engine.
- Warm up the engine until the ATF temperature reaches 60-70°C {140-158°}. Shift the selector lever from N position to D range.
- Use a stopwatch to measure the time it takes from shifting until engagement is felt. Take three measurements for each test and average the results using the following formula.
Formula
Average time lag = (Time 1 + Time 2 + Time 3) / 3
- Perform the test for the following shifts in the same manner.
- N position → P position
Time lag
N → D range ... approx. 0.5-1.0 second
N → R position ... approx. 0.6- 1.1 second
EVALUATION OF TIME LAG TESTCondition Possible Cause Above specification N → D shift Insufficient line pressure in all forward ranges
Low clutch slippage
Low one-way clutch slippage
Reduction one-way clutch slippageN → R shift Insufficient line pressure in R position
Low and reverse brake slippage
Reverse clutch slippage
Reduction brake slippage