Suzuki GA413, Service Manual

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ENGINE GENERAL INFORMATION AND DIAGNOSIS 6-87
GA413
supple
DTC P0505
INSPECTION
STEP ACTION YES NO
1 Was “ENGINE DIAG. FLOW TABLE” performed? Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE”.
2 Check Idle Air Control System.
When using SUZUKI scan tool:
1) Connect SUZUKI scan tool to DLC with ignition
switch OFF, set parking brake and block drive
wheels.
2) Warm up engine to normal operating tempera-
ture.
3) Clear DTC and select “MISC TEST” mode on
SUZUKI scan tool.
Is it possible to control (increase and reduce)
engine idle speed by using SUZUKI scan tool?
When not using SUZUKI scan tool:
1) Remove IAC valve from throttle boy referring to
“IAC Valve Removal” in Section 6E.
2) Check IAC valve for operation referring to “IAC
Valve Inspection” in Section 6E. See Fig. 1.
Is check result satisfactory?
Intermittent trouble or
faulty ECM.
Check for intermittent
referring to “Intermittent
and Poor Connection” in
Section 0A. Go to Step 3.
3 Check Wire Harness for Open and Short.
1) Turn ignition switch OFF.
2) Disconnect IAC valve connector.
3) Check for proper connection to IAC valve at
each terminals.
4) If OK, disconnect ECM connector.
5) Check for proper connection to ECM at C23-13
terminal.
6) If OK, check “BLK/RED”, “ORN” and
“BLK/BLU” circuit for open and short.
Are they in good condition?
Replace IAC valve and
recheck. Repair or replace.
Fig. 1 for Step 2