1A-61 Engine General Information and Diagnosis:
DTC Troubleshooting
NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions For DTC Troubleshooting: ”.
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed?
Go to Step 2. Go to “Engine and
Emission Control
System Check: ”.
2 Oil control valve electrical circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection at “C37-60” and “C37-59”
terminals of ECM connector.
3) If OK, measure resistance between “C37-60” and “C37-
59” terminals of ECM connector.
Is resistance below 10
Ω
?
Go to Step 3. Go to Step 8.
3 Oil control valve electrical circuit check
Was resistance more than 6.5
Ω
in Step 2?
Go to Step 4. Go to Step 7.
4 Oil control valve electrical circuit check for power short
1) Turn ON ignition switch.
2) Measure voltage between “C37-60” terminal of ECM
connector and engine ground.
Is voltage below 1 V?
Go to Step 5. “RED”, “BRN/WHT”,
“YEL” or “BRN/YEL”
wire is shorted to power
supply circuit.
5 Oil control valve electrical circuit check for ground
short
1) Disconnect connector from oil control valve with ignition
switch turned OFF.
2) Measure resistance between “C37-60” terminal of ECM
connector and engine ground.
Is resistance infinity?
Go to Step 6. “BRN/WHT” wire is
shorted to ground
circuit.
6 Oil control valve electrical circuit check for ground
short
1) Measure resistance between “C37-59” terminal of ECM
connector and engine ground.
Is resistance infinity?
Go to Step 9. “BRN/YEL” wire is
shorted to ground
circuit.
7 Oil control valve electrical circuit check for short
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. “BRN/WHT” wire is
shorted to “BRN/YEL”
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 “BRN/WHT” wire terminal of oil control
valve connector and between “C37-59” terminal of ECM
connector and “BRN/YEL” wire terminal of oil control
valve connector.
Is resistance below 1
Ω
?
Go to Step 9. “BRN/WHT” wire or
“BRN/YEL” wire circuit
is open or high
resistance.
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