Subaru IMPREZA 2002 Service Manual page 418

a
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step Check
1
CHECK INPUT SIGNAL FOR ECM. Is the voltage more than 8 V?
D: DTC PO038
-
REAR OXYGEN SENSOR HEATER CIRCUIT HIGH INPUT
-
DTC DETECTING CONDITION:
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode<Ref. to EN(S0HC)-43, OP-
ERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(S0HC)-40, OPERATION, Inspec-
tion Mode.>.
WIRING DIAGRAM:
Two consecutive driving cycles with fault
Yes No
Go to step 2. Go to step 3 .
EN1
083
Measure the voltage between ECM connector
and chassis ground.
Connector & terminal
(81341 No. 21 /+I
-
Chassis around
(4:
EN(S0HC)-94