Subaru Forester 2004 Service Manual page 94

Diagnostics Procedure without Diagnostic Trouble Code (DTC)
Step
8 CHECK GROUND SHORT OF HARNESS.
Measure the resistance between ABSCM&H/U
connector and chassis ground.
Connector & terminal
LHD: (B301) No. 28 — Chassis ground:
RHD: (F49) No. 28 — Chassis ground:
9 CHECK G SENSOR.
1) Turn the ignition switch to OFF.
2) Remove the G sensor from vehicle.
3) Connect the connector to G sensor.
4) Connect the connector to ABSCM&H/U.
5) Turn the ignition switch to ON.
6) Measure the voltage between G sensor
connector terminals.
Connector & terminal
(B292) No. 2 (+) — No. 3 (
10 CHECK G SENSOR.
Measure the voltage between G sensor con-
nector terminals.
Connector & terminal
(B292) No. 2 (+) — No. 3 (
11 CHECK G SENSOR.
Measure the voltage between G sensor con-
nector terminals.
Connector & terminal
(B292) No. 2 (+) — No. 3 (
12 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in con-
13 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the DTC.
14 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES (DTCs) APPEARANCE.
Is the resistance more than 1
MΩ?
Is the voltage 2.1 — 2.4 V
when G sensor is in horizontal
position?
−
):
Is the voltage 3.7 — 4.1 V
when G sensor is inclined for-
wards to 90°?
−
):
Is the voltage 0.5 — 0.9 V
when G sensor is inclined
backwards to 90°?
−
):
nector between ABSCM&H/U
and G sensor?
Is the same DTC as in the cur-
rent diagnosis still being out-
put?
Are other DTCs being output? Proceed with the
ABS-93
Check
Go to step 9.
Go to step 10.
Go to step 11.
Go to step 12.
Repair the con-
nector.
Replace the
ABSCM only.
<Ref. to ABS-8,
ABSCM (ABS
CONTROL MOD-
ULE), REPLACE,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
diagnosis corre-
sponding to DTC.
ABS (DIAGNOSTIC)
Yes No
Repair the har-
ness between G
sensor and
ABSCM&H/U.
Replace the
ABSCM only.
<Ref. to ABS-8,
ABSCM (ABS
CONTROL MOD-
ULE), REPLACE,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Replace the G
sensor. <Ref. to
ABS-23, G Sen-
sor.>
Replace the G
sensor. <Ref. to
ABS-23, G Sen-
sor.>
Replace the G
sensor. <Ref. to
ABS-23, G Sen-
sor.>
Go to step 13.
Go to step 14.
A temporary poor
contact.