Subaru 2002 IMPREZA Service Manual page 2229

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
Step
1 CHECK GENERATOR.
1)Start the engine.
2)Idle after warm-up.
3)Measure the voltage between generator B
terminal and chassis ground.
Terminal
Generator B terminal — Chassis ground:
2 CHECK BATTERY TERMINAL.
Turn the ignition switch to OFF.
3 CHECK INPUT VOLTAGE OF ABSCM&H/U.
1)Disconnect the connector from ABSCM&
H/U.
2)Run the engine at idle.
3)Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
LHD: (B301) No. 1 (+) — Chassis ground
( − − − − ):
RHD: (F49) No. 1 (+) — Chassis ground
( − − − − ):
4 CHECK GROUND CIRCUIT OF ABSCM&H/U.
1)Turn the ignition switch to OFF.
2)Measure the resistance between
ABSCM&H/U connector and chassis ground.
Connector & terminal
LHD: (B301) No. 23 — Chassis ground:
RHD: (F49) No. 23 — Chassis ground:
5 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in con-
6 CHECK ABSCM&H/U.
1)Connect all connectors.
2)Erase the memory.
3)Perform the inspection mode.
4)Read out the DTC.
7 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES (DTCs) APPEARANCE.
Check
Is the voltage between 10 and
15 V?
Are the positive and negative
battery terminals tightly
clamped?
Is the voltage between 10 and
15 V?
Is the resistance less than 0.5
Ω?
nectors between generator,
battery and ABSCM&H/U?
Is the same DTC as in the cur-
rent diagnosis still being out-
put?
Are other DTCs being output? Proceed with the
ABS-131
ABS (DIAGNOSTICS)
Yes
Go to step 2. Repair the genera-
tor. <Ref. to SC-
14, Generator.>
Go to step 3. Tighten the clamp
of terminal.
Go to step 4. Repair the har-
ness connector
between battery,
ignition switch and
ABSCM&H/U.
Go to step 5. Repair the
ABSCM&H/U
ground harness.
Repair the con- Go to step 6.
nector.
Replace the Go to step 7.
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
A temporary poor
diagnosis corre- contact.
sponding to DTC.
No