Repair Instructions; Idle Speed And Iac Throttle Valve Opening Inspection - Suzuki 2006 SX4 Service Manual

1A-168 Engine General Information and Diagnosis:
Idle Speed and IAC Throttle Valve Opening
Inspection
Before idle speed check, make sure of the following.
• Lead wires and hoses of electronic fuel injection and
engine and emission control systems are connected
securely.
• Valve lash is checked according to maintenance
schedule.
• Ignition timing is within specification.
• All accessories (wipers, heater, lights, A/C, etc.) are
out of service.
• Air cleaner has been properly installed and is in good
condition.
• There are no abnormal air drawn in from air intake
system.
• There are no obstruction in PCV valve or its hoses.
After all items are confirmed, check idle speed and IAC
throttle opening as follows.
NOTE
Before starting engine, place transmission
gear shift lever in "Neutral" (shift selector
lever to "P" range for A/T vehicle), and set
parking brake and block drive wheels.

Repair Instructions

1) Connect SUZUKI scan tool to DLC (1) with ignition
switch turned OFF.
S6RW0C1106001
Special tool
(A): SUZUKI scan tool (SUZUKI-SDT)
2) Warm up engine to normal operating temperature.
3) Check engine idle speed and "IAC throttle opening"
by using "Data List" mode on scan tool to check "IAC
throttle opening".
If check result is out of specification, inspect the
followings.
• EVAP canister purge control system referring to
"EVAP Canister Purge Inspection in Section 1B".
• Electric load signal circuit referring to "Electric
Load Signal Circuit Check".
• PCV system referring to "PCV Hose Inspection in
Section 1B".
• Electric throttle body assembly referring to
"Electric Throttle Body Assembly On-Vehicle
Inspection in Section 1C".
Engine idle speed
A/C OFF: 680 – 780 rpm (IAC throttle opening: 10
– 20%)
A/C ON: 750 – 850 rpm (IAC throttle opening: 15
– 25%)
4) Check that specified engine idle speed is obtained
with A/C turned ON if vehicle is equipped with A/C.
If not, check A/C system referring to "A/C System
Circuits Check".
1
(A)
I5RW0C110011-01