Subaru IMPREZA GD 2007 Series Manual page 3187

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTICS)
Step
1 CHECK THE ABSCM&H/U GROUND CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the ABSCM&H/U connectors.
3) Measure the resistance between the
ABSCM&H/U and chassis ground.
Connector & terminal
(B301) No. 15 — Chassis ground:
2 CHECK POOR CONTACT OF CONNECTOR. Is there poor contact of the con-
3 CHECK CAUSE OF SIGNAL NOISE.
4 CHECK CAUSE OF SIGNAL NOISE.
5 CHECK ABSCM&H/U.
1) Turn the ignition switch to OFF.
2) Connect all connectors.
3) Erase the memory.
4) Perform the Inspection Mode.
5) Read the DTC.
6 CHECK OTHER DTC DETECTION.
Check
Is resistance less than 0.5 Ω?
nector between the battery,
ignition switch and ABSCM&H/
U?
Is the car telephone or the radio
properly installed?
Is there a noise source (such as
an antenna) installed near the
sensor harness?
Is the same DTC still output?
Is there any other DTC
detected?
ABS(diag)-58
Yes No
Go to step 2. Repair the
ABSCM&H/U
ground harness.
Go to step 3.
Repair the connec-
tor.
Go to step 4.
Install the car tele-
phone or radio
properly.
Install the noise Go to step 5.
source apart from
the sensor har-
ness.
Go to step 6.
Replace the
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Perform the diag- Temporary poor
nosis according to contact occurs.
DTC.