EN(H4SO)(diag)-167
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK CURRENT DATA.
1) Start the engine.
2) Read the data of oil temperature sensor sig-
nal using Subaru Select Monitor or general
scan tool.
NOTE:
• SUBARU SELECT MONITOR
For detailed operation procedure, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4SO)(diag)-33, Subaru Select Moni-
tor.>
• General Scan Tool
For detailed operation procedures, refer to the
general scan tool operation manual.
Is the oil temperature 215°C
(419°F) or more?
Go to step 2.
Even if DTC is
detected, the cir-
cuit has returned to
a normal condition
at this time. Repro-
duce the failure,
and then perform
the diagnosis
again.
NOTE:
In this case, tem-
porary poor con-
tact of connector
may be the cause.
2
CHECK HARNESS BETWEEN ECM AND OIL
TEMPERATURE SENSOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM and oil
temperature sensor.
3) Measure the resistance between ECM and
chassis ground.
Connector & terminal
(B134) No. 23 — Chassis ground:
Is the resistance 1 M
: or
more?
Replace the oil
temperature sen-
sor. <Ref. to
FU(H4SO)-34, Oil
Temperature Sen-
sor.>
Repair the short
circuit to ground in
harness between
ECM and oil tem-
perature sensor.