Time Lag Test - Suzuki Wagon R Plus RB310 Service Manual

7B1-40 AUTOMATIC TRANSAXLE (M13 ENGINE)

Time Lag Test

This test is to check conditions of clutch, brake and fluid pressure. "Time lag" means time elapsed since selector
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 test 3 times and take average of those data for final time lag data.
Troubleshooting
Condition
→
"N" "D" time lag
exceeds specification
→
"N" "R" time lag
exceeds specification
Possible Cause
Malfunction of transmission fluid temperature
sensor
Malfunction of pressure control solenoid valve
(Low line pressure)
Faulty valve body component
Clogged oil strainer
Faulty oil pump
Faulty forward clutch
Faulty one-way No.2 clutch
Leakage from "D" range fluid pressure circuit
Malfunction of transmission fluid temperature
sensor
Malfunction of pressure control solenoid valve
(Low line pressure)
Faulty valve body component
Clogged oil strainer
Faulty oil pump
Faulty reverse clutch
Faulty 1st and reverse brake
Leakage from "R" range fluid pressure circuit
Correction
Inspect. If NG, replace.
Inspect. If NG, replace valve body
assembly.
Replace valve body assembly.
Replace.
Inspect. If NG, replace.
Overhaul or replace valve body
assembly.
Inspect. If NG, replace.
Inspect. If NG, replace valve body
assembly.
Replace valve body assembly.
Replace.
Inspect. If NG, replace.
Overhaul or replace valve body
assembly.