Time Lag Test
DESCRIPTIONIf the selector lever is shifted while the engine is idling, there will be a certain time elapse or lag before the shock can be felt. This is used for checking the condition of the forward clutch, reverse clutch, low/reverse brake, forward one-way clutch and low one-way clutch.
CAUTION:
^ Perform the test at normal operation fluid temperature (60 to 80°C or 140 to 176°F).
^ Be sure to allow a one minute interval between tests.
^ Make three measurements and take the average value.
TEST METHODS
1. Fully apply the parking brake.
2. Start the engine and check idling speed (A/C OFF) "N" range: 610 +/- 100 rpm
3. Shift the selector lever from "N" to "D" range. Using a stop watch, measure the time it takes from shifting the lever until the shock is felt.
- Time lag: Less than 1.2 seconds
4. In same manner, measure the time lag for "N" "R".
- Time lag: Less than 1.5 seconds
EVALUATION
1. If "N" to "D" time lag is longer than specified:
- Line pressure too low
- Forward clutch worn
- Low one-way clutch not operating properly
2. If "N" to "R" time lag is longer than specified:
- Line pressure too low
- Reverse clutch worn
- Low/Reverse brake worn
- Forward one-way clutch not operating properly