1A-135 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
Do you have SUZUKI scan tool?
Go to Step 3.
Go to Step 5.
3
EGR valve operation check
1) With ignition switch turned OFF, install SUZUKI scan tool
to DTC.
2) Check EGR system referring to “EGR System
Inspection: in Section 1B”.
Is it in good condition?
Go to Step 4.
Go to Step 5.
4
MAP sensor check
1) Check MAP sensor for performance referring to
“Manifold Absolute Pressure (MAP) Sensor Inspection:
in Section 1C”.
Is check result satisfactory?
Intermittent trouble or
faulty ECM.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection: in Section
00”.
Replace MAP sensor.
5
EGR valve control circuit check
1) Check that EGR valve control circuits are in good
condition referring to Step 2 to 5 of “DTC P0403:
Exhaust Gas Recirculation Control Circuit: ”
Are circuits in good condition?
Go to Step 6.
Repair or replace EGR
valve control circuit(s).
6
EGR valve check
1) Check EGR valve referring to “EGR Valve Inspection: in
Section 1B”.
Is check result satisfactory?
Go to Step 7.
Faulty EGR valve.
7
MAP sensor check
1) Check MAP sensor for performance referring to
“Manifold Absolute Pressure (MAP) Sensor Inspection:
in Section 1C”.
Is check result satisfactory?
EGR passage clogged.
If OK, substitute a
known-good ECM and
recheck.
Replace MAP sensor.
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