5A
Time Lag Test
This test is to check conditions of clutch, brake and fluid pressure. “Time lag” means time elapsed since select lever is shifted with engine idling till shock is felt.
1) With chocks placed before and behind front and rear wheels respectively, depress brake pedal.
2) Start engine.
3) With stop watch ready, shift select lever from “N” to “D” range and measure time from that moment till shock is felt.
4) Similarly measure time lag by shifting select lever from “N” to “R” range.
Gear shifting time lag
“N” → “D”: Less than 0.7 sec.
“N” → “R”: Less than 1.2 sec.
NOTE:
• When repeating this test, be sure to wait at least one minute after select lever is shifted back to “N” range.
• Engine should be warmed up fully for this test.
• Repeat 3 times and take average of those data for final time lag data.
Troubleshooting
Condition Possible Cause Action
“N” → “D” time lag exceeds specification
Malfunction of transmission fluid temperature sensor
Inspect. If NG, replace.
Malfunction of pressure control solenoid valve (Low line pressure)
Inspect. If NG, replace valve body assembly.
Faulty valve body component
Replace valve body assembly.
Clogged oil strainer
Replace.
Faulty oil pump
Inspect. If NG, replace.
Faulty forward clutch
Inspect. If NG, replace.
Faulty one-way No.2 clutch
Inspect. If NG, replace.
Leakage from “D” range fluid pressure circuit
Overhaul or replace valve body assembly.
“N” → “R” time lag exceeds specification
Malfunction of transmission fluid temperature sensor
Inspect. If NG, replace.
Malfunction of pressure control solenoid valve (Low line pressure)
Inspect. If NG, replace valve body assembly.
Faulty valve body component
Replace valve body assembly.
Clogged oil strainer
Replace.
Faulty oil pump
Inspect. If NG, replace.
Faulty reverse clutch
Inspect. If NG, replace.
Faulty 1st and reverse brake
Inspect. If NG, replace.
Leakage from “R” range fluid pressure circuit
Overhaul or replace valve body assembly.