Subaru Forester 2004 Service Manual page 164

Diagnostics Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK OUTPUT OF G SENSOR USING SE-
LECT MONITOR.
1) Select "Current data display & Save" on the
select monitor.
2) Read the G sensor output in select monitor
data display.
2 CHECK POOR CONTACT IN CONNECTORS. Is there poor contact in con-
3 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform the inspection mode.
4) Read out the DTC.
4 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES (DTCs) APPEARANCE.
5 CHECK FREEZE FRAME DATA.
1) Select "Freeze frame data" on the select
monitor.
2) Read front right wheel speed on the select
monitor display.
6 CHECK FREEZE FRAME DATA.
Read front left wheel speed on the select mon-
itor display.
7 CHECK FREEZE FRAME DATA.
Read rear right wheel speed on the select
monitor display.
8 CHECK FREEZE FRAME DATA.
Read rear left wheel speed on the select moni-
tor display.
9 CHECK FREEZE FRAME DATA.
Read G sensor output on the select monitor
display.
10 CHECK OPEN CIRCUIT IN G SENSOR OUT-
PUT HARNESS AND GROUND HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ABSCM&
H/U.
3) Measure the resistance between
ABSCM&H/U connector terminals.
Connector & terminal
LHD: (B301) No. 6 — No. 28:
RHD: (F49) No. 6 — No. 28:
Check
Is the voltage 2.1 — 2.5 V
when G sensor is in horizontal
position?
nector between ABSCM&H/U
and G sensor?
Is the same DTC as in current
diagnosis still being output?
Are other DTCs being output? Proceed with the
Is the front right wheel speed
on monitor display 0 km/h (0
MPH)?
Is the front left wheel speed on
monitor display 0 km/h (0
MPH)?
Is the rear right wheel speed
on monitor display 0 km/h (0
MPH)?
Is the rear left wheel speed on
monitor display 0 km/h (0
MPH)?
Is the G sensor output on mon-
itor display more than 3.65 V?
Is the resistance 4.3 — 4.9
kΩ?
ABS-163
ABS (DIAGNOSTIC)
Yes
Go to step 2. Go to step 5.
Repair the con- Go to step 3.
nector.
Replace the Go to step 4.
ABSCM only.
<Ref. to ABS-8,
ABSCM (ABS
CONTROL MOD-
ULE), REPLACE,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
A temporary poor
diagnosis corre- contact.
sponding to DTC.
Go to step 6. Go to step 16.
Go to step 7. Go to step 16.
Go to step 8. Go to step 16.
Go to step 9. Go to step 16.
Go to step 10. Go to step 16.
Go to step 11. Repair the har-
ness/connector
between G sensor
and ABSCM&H/U.
No