Engine Brake Test; Stall Test - Suzuki Grand Vitara XL-7 Service Manual

ENGINE BRAKE TEST

WARNING:
Before test, make sure that there is no vehicle behind so as to prevent rear-end collision.
1) While driving vehicle in 3rd gear of "D" range, shift select lever down to "2" range and check if engine brake
operates.
2) In the same way as in step 1, check engine brake for operation when select lever is shifted down to "L" range.
3) If engine brake fails to operate in above tests, possible causes for such failure are as follows. Check each part
which is suspected to be the cause.
TROUBLESHOOTING
Condition
Failure to operate when shifted down to
"2" range
Failure to operate when shifted down to
"L" range

STALL TEST

This test is to check overall performance of automatic transmission and engine by measuring stall speed at "D"
and "R" ranges. Be sure to perform this test only when transmission fluid is at normal operating temperature and
its level is between FULL and LOW marks.
CAUTION:
D Do not run engine at stall more than 5 seconds continuously, for fluid temperature may rise exces-
sively high.
D After performing stall test, be sure to leave engine running at idle for longer than 30 seconds before
another stall test.
1) Apply parking brake and block wheels.
2) Install tachometer.
3) Start engine with select lever shifted to "P".
4) Depress brake pedal fully.
5) Shift select lever to "D" 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 the following specification.
Stall speed:
2,450 – 2,750 rpm
Possible cause
Defective second coast brake
Defective reverse brake
AUTOMATIC TRANSMISSION (4 A / T) 7B1-27
Correction
Replace.
Replace.