Time Lag Test

Time Lag Test

INSPECTION
GENERAL INFORMATION
If the select 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 low clutch, reverse clutch, low & reverse brake and one-way clutch.

NOTE:
^ Perform the test at normal operating fluid temperature 60 to 80°C (140 to 176°F).
^ Be sure to allow a 1 minute interval between tests.
^ Make three measurements and take the average value.

TEST METHODS
1. Fully apply the parking brake.
2. Start the engine. Check the idling speed (A/C OFF).
3. Shift the select 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 the same manner, measure the time lag for "N" - "R".
Time lag: Less than 1.5 seconds

EVALUATION
1. if "N" - "D" time lag is longer than specified:
^ Line pressure too low
^ Low clutch worn
^ One-way clutch not operating properly
2. If "N" - "R" time lag is longer than specified:
^ Line pressure too low
^ Reverse clutch worn
^ Low & reverse brake worn