Suzuki Wagon R Plus RB310, Service Manual

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6-2-62 ENGINE GENERAL INFORMATION AND DIAGNOSIS (M13 ENGINE)
DTC Confirmation Procedure
1) Clear DTC. Refer to “DTC Clearance”.
2) Start engine and keep it at idle for 10 seconds.
3) Check DTC. Refer “DTC Check”.
Troubleshooting
Step Action Yes No
1 Was “Engine and Emission Control System Check” per-
formed? Go to Step 2. Go to “Engine and
Emission Control
System Check” in
this section.
2 Check oil control valve power supply circuit.
1) Disconnect connectors from oil control valve with ignition
switch turned OFF.
2) Connect oscilloscope between “E22-3” terminal of ECM
connector and engine ground with ignition switch turned
ON.
3) Check waveform of oil control valve referring to “Inspection
of ECM and Its Circuits” in this section.
Is it in good condition?
Go to Step 3. Go to Step 8.
3 Check wire circuit.
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure voltage between “E22-3” terminal of ECM con-
nector and vehicle body ground.
Is voltage 0 – 1 V?
Go to Step 4. “BLK/YEL” wire
shorted to power
supply circuit.
4 Check wire circuit.
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection to “E22-2” and “E22-3” termi-
nals of ECM connector
3) If OK, measure resistance between “E22-2” terminal of
ECM connector and vehicle body ground.
Is resistance infinity?
Go to Step 5. “GRN” or “BRN/
YEL” wire shorted
to ground circuit.
5 Check wire circuit
1) Measure voltage between “E22-2” terminal of ECM con-
nector and engine ground with ignition switch turned ON.
Is voltage 0 – 1 V?
Go to Step 6 “GRN” or “BRN/
YEL” wire shorted
to power supply
circuit.
6 Check wire circuit
1) Turn ignition switch to OFF position.
2) Measure resistance between “E22-2” terminal of ECM con-
nector and “GRN” wire terminal of oil control valve connec-
tor.
Is resistance 1
Ω
or less?
Go to Step 7. “GRN” or “BRN/
YEL” wire open or
high resistance cir-
cuit.
7 Check oil control valve.
1) Check oil control valve referring to “Oil Control Valve
Inspection” in Section 6E2.
Is it in good condition?
Substitute a know-
good ECM and
recheck. Replace oil con-
trol valve.