Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 116
SC(STI)-20
Starter
STARTING/CHARGING SYSTEMS
7. PERFORMANCE TEST
The starter should be submitted to performance
tests whenever it has been overhauled, to assure
its satisfactory performance when installed on the
engine.
Three performance tests, no-load test, load test,
and lock test, are presented here; however, if the
load test and lock test cannot be performed, carry
out at least the no-load test.
For these performance tests, use the circuit shown
in figure.
1) Adjust the variable resistance with the switch on
until the voltage is 11 V, and read the value dis-
played by the ammeter to measure starter speed.
Compare these values with the standard.
No-load test (standard):
Voltage/Current
6MT
Max. 11 V/90 A or less
5MT
Max. 11 V/95 A or less
Rotating speed
6MT
2,860 rpm or more
5MT
2,500 rpm or more
2) Apply the specified braking torque to starter. The
condition is normal if the current draw and starter
speed are within standard.
Load test (standard):
Voltage/Load
6MT
8 V/9.3 N·m (0.9 kgf-m, 6.9 ft-lb) or more
5MT
7.5 V/8.84 N·m (0.9 kgf-m, 6.5 ft-lb) or more
Current/Speed
6MT
280 A/860 rpm or more
5MT
300 A/870 rpm or more
3) With the starter stalled, or not rotating, measure
the torque developed and current draw when the
voltage is adjusted to standard voltage.
Lock test (standard):
Voltage/Current
6MT
4 V/515 A or less
5MT
4 V/680 A or less
Torque
6MT
16 N·m (1.6 kgf-m, 11.8 ft-lb) or more
5MT
17 N·m (1.7 kgf-m, 12.5 ft-lb) or more
8. OTHER INSPECTIONS
Check that the starter does not have deformation,
cracks and any other damage.
(A) Variable resistance
(B) Magnet switch
(C) Starter body
(A)
(B)
(C)
12V
+
A
V
B
S
M
SC-00077