EN(H4DOTC)(diag)-352
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK HARNESS BETWEEN ECM AND OIL
FLOW CONTROL SOLENOID VALVE LH
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM and
oil flow control solenoid valve LH.
3) Measure the voltage between ECM connec-
tor and chassis ground.
Connector & terminal
(B134) No. 5 (+) — Chassis ground (–):
(B134) No. 14 (+) — Chassis ground (–):
Is the voltage less than 1 V?
Go to step
2.
Repair the short
circuit to power in
harness between
ECM connector
and oil flow control
solenoid valve LH
connector.
2
CHECK HARNESS BETWEEN ECM AND OIL
FLOW CONTROL SOLENOID VALVE LH
CONNECTOR.
Measure the resistance of harness between
ECM connector and oil flow control solenoid
valve LH connector.
Connector & terminal
(B134) No. 5 — (E66) No. 1:
(B134) No. 14 — (E66) No. 2:
Is the resistance less than 1 Ω? Go to step
3.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit in
harness between
ECM
connector
and oil flow control
solenoid valve LH
connector
• Poor contact of
coupling connector
3
CHECK OIL FLOW CONTROL SOLENOID
VALVE.
Measure the resistance between oil flow control
solenoid valve terminals.
Terminals
No. 1 — No. 2:
Is the resistance 6 — 12 Ω?
Repair the poor
contact of ECM
and oil flow control
solenoid valve LH
connector.
Replace the oil
flow control sole-
noid valve LH.
<Ref. to FU(STI)-
50, Oil Flow Con-
trol Solenoid
Valve.>