Time Lag Test
TIME LAG TESTIf selector lever is shifted while engine is idling, there will be a certain time lapse, or time lag, before shock is felt. This step measures time lag to check condition of N-D, 1-2, and N-R accumulators; forward and one-way clutches; reverse clutch; low and reverse brake and 2-4 brake band.
PREPARATION
Follow preparation procedure outlined in Stall Test.
PROCEDURE
1. Start engine.
2. Check idle speed in P range.
Idle speed: 750 - 850 rpm (with parking brake applied)
3. Shift from N range to D range.
4. Use a stopwatch to measure time it takes from shifting until shock is felt.
5. Shift selector to N range and run engine at idle speed for at least one minute.
CAUTION: Idling for at least one minute coots ATF and prevents its deterioration.
NOTE: Make three measurements for each test and take average value.
6. Perform test for following shifts in same manner.
a. N => D range
b. N => D range (O/D OFF MODE)
c. N => R range
Time lag: N => D range 0.5 - 0.6 second
Time lag: N => R range 0.6 - 0.7 second
EVALUATION OF TIME LAG TEST