Time Lag Test

Time Lag Test

INSPECTION

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. This symptom helps to check the condition of forward clutch and reverse brake.
^ Perform the test at normal operation CVTF temperature of 60 - 80°C (140 - 176°F).
^ Be sure to allow one minute or more interval between tests.
^ Make three measurements and take the average value.

1) Apply the parking brake.
2) Start the engine. Check the idle speed. (A/C OFF)
3) Shift the select lever from "N" to "D" range. Using a stop watch, measure the time elapsed from shifting the lever until the shock is felt.

Time lag standard:
1.2 seconds or less

If "N" to "D" time lag is longer than specified:
^ Secondary pressure (line pressure) is too low.
^ Forward clutch worn
^ Forward clutch piston malfunction
^ Control valve body malfunction
^ Learning incomplete
4) In the same manner, measure the time lag when shifting from "N" to "R" range.

Time lag standard:
1.5 seconds or less

If "N" to "R" time lag is longer than specified:
^ Secondary pressure (line pressure) is too low.
^ Reverse brake worn
^ Reverse brake piston malfunction
^ Control valve body malfunction
^ Learning incomplete