Engine General Information and Diagnosis: 1A-51
6 Oil control valve electrical circuit for ground short
check
1) Measure resistance between “C37-59” terminal of ECM
connector and engine ground.
Is resistance infinity?
Go to Step 9. “YEL/GRN” wire is
shorted to ground
circuit.
7 Oil control valve electrical circuit for short check
1) Disconnect connector from oil control valve with ignition
switch turned OFF.
2) Measure resistance between “C37-60” and “C37-59”
terminals of ECM connector.
Is resistance infinity?
Go to Step 9. “YEL/RED” wire is
shorted to “YEL/GRN”
wire.
8 Oil control valve electrical circuit check
1) Disconnect connector from oil control valve with ignition
switch turned OFF.
2) Measure resistance between “C37-60” terminal of ECM
connector and “YEL/RED” wire terminal of oil control
valve connector and between “C37-59” terminal of ECM
connector and “YEL/GRN” wire terminal of oil control
valve connector.
Is resistance below 1
Ω
?
Go to Step 9. “YEL/RED” or “YEL/
GRN” wire circuit is
open or high resistance.
9 Oil control valve check
Check oil control valve referring to “Oil Control Valve
Inspection in Section 1D”.
Is resistance within specified value?
Substitute a known-
good ECM and recheck.
Faulty oil control valve.
Step Action Yes No
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