Suzuki SX4 Service Manual page 108

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1A-58 Engine General Information and Diagnosis:
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
"Precautions for DTC Troubleshooting".
Step
1
Was "Engine and Emission Control System Check"
performed?
2
Do you have SUZUKI scan tool?
3
Camshaft position control check
1) With ignition switch turned OFF, connect SUZUKI scan
tool.
2) Start engine and warm up to normal operating
temperature.
3) Select menu to "Data List".
4) Check that "VVT GAP" displayed on SUZUKI scan tool is
0 – 3°.
Is it OK?
4
Camshaft position control check
1) Drive vehicle under following conditions.
• Vehicle speed at 80 km/h (50 mile/h).
• Gear position at 5th or D range.
2) Check that "VVT GAP" displayed on SUZUKI scan tool is
0 – 5°.
Is it OK?
5
Oil control circuit visual inspection
1) Remove cylinder head cover referring to "Cylinder Head
Cover Removal and Installation in Section 1D".
2) Check oil pressure leakage from oil control circuit.
Is it in good condition?
6
Oil control valve and oil gallery pipe check
1) Remove oil control valve referring to "Oil Control Valve
Removal and Installation (For Engine with VVT) in
Section 1D".
2) Remove oil gallery pipe referring to "Timing Chain Cover
Removal and Installation in Section 1D".
3) Check oil gallery pipe and oil control valve for clog or
sludge.
Are they in good condition?
7
Oil control valve electrical circuit check
1) Check that oil control valve circuit is in good condition
referring to "DTC P0010: Camshaft Position Actuator
Circuit (for engine with VVT system)".
Is circuit in good condition?
8
Oil control valve check
1) Check oil control valve referring to "Oil Control Valve
Inspection (For Engine with VVT) in Section 1D".
Is it in good condition?
Action
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Substitute a known-
good ECM and recheck.
Go to Step 6.
Go to Step 7.
Repair circuit.
Replace camshaft
timing sprocket.
No
Go to "Engine and
Emission Control
System Check".
Go to Step 5.
Check valve timing
referring to "Timing
Chain and Chain
Tensioner Removal and
Installation in Section
1D". If OK, go to Step 5.
Go to Step 5.
Repair or replace.
Clean oil control valve
and oil gallery pipe.
Replace oil control valve
if a problem is not
solved after cleaning oil
control valve and oil
gallery pipe.
Go to Step 8.
Replace oil control
valve.

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