Suzuki Wagon R Plus RB310 Service Manual page 237

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
1 Was "Engine and Emission Control System Check" per-
formed?
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?
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?
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?
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?
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
7 Check oil control valve.
1) Check oil control valve referring to "Oil Control Valve
Inspection" in Section 6E2.
Is it in good condition?
Action
Ω
or less?
Yes
Go to Step 2. Go to "Engine and
Emission Control
System Check" in
this section.
Go to Step 3. Go to Step 8.
Go to Step 4. "BLK/YEL" wire
shorted to power
supply circuit.
Go to Step 5. "GRN" or "BRN/
YEL" wire shorted
to ground circuit.
Go to Step 6 "GRN" or "BRN/
YEL" wire shorted
to power supply
circuit.
Go to Step 7. "GRN" or "BRN/
YEL" wire open or
high resistance cir-
cuit.
Substitute a know- Replace oil con-
good ECM and trol valve.
recheck.
No