Subaru Legacy 2002 Service Manual page 1313

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Engine (DIAGNOSTICS)
D: DTC P0038 — BANK #1 AND SENSOR #2 OXYGEN SENSOR (REAR)
HEATER CIRCUIT HIGH INPUT —
¼ DTC DETECTING CONDITION:
¼ Two consecutive driving cycles with fault
CAUTION:
After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(H6)-49,
OPERATION, Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(H6)-46, OPERATION,
Inspection Mode.>.
¼ WIRING DIAGRAM:
No.
1 CHECK INPUT SIGNAL FOR ECM.
Measure voltage between ECM connector
and chassis ground.
Connector & terminal
(B136) No. 13 (+) — Chassis ground
(−):
S048521H24
Step
Is the voltage more than 8
V?
EN(H6)-106
Check Yes
Go to step 2.
B2M4746
No
Go to step 3.