Repair Instructions; Idle Speed And Iac Throttle Valve Opening Inspection - Suzuki Grand Vitara 2011 Manual

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.
• ECT sensor performance is in good condition.
• All accessories (wipers, heater, lights, A/C, etc.) are
out of service.
• Air cleaner has been properly installed and is in good
condition.
• No abnormal air drawn in air intake system.
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.
1) Connect SUZUKI scan tool to DLC (1) with ignition
switch turned OFF.
Special tool
(A): SUZUKI scan tool
(A)
Engine General Information and Diagnosis: For Petrol Engine Model 1A-264

Repair Instructions

S6JB0A1116001
1
I5JB0A110106-01
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".
4) If check result is out of specification, check EGR
system (EGR valve), EVAP system (EVAP canister
purge valve) and PCV system (PCV valve) for stuck
open or air inhaling. If those system are in good
condition, inspect electric throttle body assembly
referring to "Electric Throttle Body Assembly On-
Vehicle Inspection: For Petrol Engine Model in
Section 1C".
Engine idle speed (M16 Engine)
A/C OFF: 660 ± 50 rpm
A/C ON: 750 ± 50 rpm
Engine idle speed (J20 Engine)
A/C OFF: 650 ± 50 rpm (IAC duty: 5 – 55%)
A/C ON: 750 ± 50 rpm
5) 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.