Suzuki WagonR+ RB310, Service Manual

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AUTOMATIC TRANSAXLE (M13 ENGINE MODEL) 7B1-39
Stall Test
This test is to check overall performance of automatic transaxle and engine by measuring stall speed at “ D ” and
“ R ” ranges. Be sure to perform this test only when transaxle fluid is at normal operating temperature and its level
is between FULL and LOW marks.
1) Apply parking brake and block wheels.
2) Install tachometer.
3) Start engine with select lever shifted to
“ P ” range.
4) Depress brake pedal fully.
5) Shift select lever to
“ D ” range and depress accelerator pedal fully while watching tachometer. Read engine
rpm quickly when it has become constant (stall speed).
6) Release accelerator pedal immediately after stall speed is checked.
7) In the same way, check stall speed in
“ R ” range.
8) Stall speed should be within following specification.
Engine stall speed
Standard: 2,050
– 2,350 rpm
Troubleshooting
CAUTION:
• Do not run engine at stall more than 5 seconds continuously, or fluid temperature may rise exces-
sively high.
• After performing stall test, be sure to leave engine running at idle for longer than 1 minute before
another stall test.
Condition Possible Cause Correction
Lower than standard
level in both
“ D ” and
“ R ” range
Engine output torque failure Inspect and repair engine.
Faulty one-way clutch of torque converter
Replace torque converter.
Higher than standard
level in
“ D ” range
Malfunction of pressure control solenoid valve
(Low line pressure) Inspect. If NG, replace valve body
assembly.
Faulty valve body component Replace valve body assembly.
Slippery forward clutch
Inspect. If NG, replace.
Faulty one-way No.2 clutch
Leakage from
“ D ” range fluid pressure circuit Overhaul or replace valve body
assembly.
Higher than standard
level in
“ R ” range
Malfunction of pressure control solenoid valve
(Low line pressure) Inspect. If NG, replace valve body
assembly.
Faulty valve body component Replace valve body assembly.
Slippery reverse clutch
Inspect. If NG, replace.
Slippery 1st and reverse brake
Leakage from
“ R ” range fluid pressure circuit Overhaul or replace valve body
assembly.
Higher than standard
level in both
“ D ” and
“ R ” range
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.
Leakage from both “ D ” and “ R ” range fluid pres-
sure circuit
Overhaul or replace valve body
assembly.