Suzuki Liana RH413, Service Manual

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Engine General Information and Diagnosis: 1A-98
DTC Confirmation Procedure
1) Turn ignition switch OFF.
2) Clear DTC with ignition switch ON.
3) Start engine and run it at idle for 1 min.
4) Check DTC and pending DTC.
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 Is SUZUKI scan tool available? Go to Step 3. Go to Step 4.
3 Check idle air control system
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 temperature.
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?
Intermittent trouble or
faulty ECM.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”. Go to Step 5.
4 Check idle air control system
1) Remove IAC valve from throttle body referring to “Idle Air
Control (IAC) Valve Removal and Installation in Section
1C”.
2) Check IAC valve for operation referring to “Idle Air
Control (IAC) Valve 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”. Go to Step 5.
5 Check wire harness for open and short
1) Turn ignition switch OFF.
2) Disconnect IAC valve coupler.
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 “C41-6” terminal.
6) If OK, check “BLK/RED”, “GRN/RED” and “BLK” circuit
for open and short.
Are they in good condition?
Replace IAC valve and
recheck. Repair or replace.
IYSY01111094-01