Repair Instructions; Idle Speed And Iac Throttle Valve Opening Inspection - Suzuki GRAND VITARA Owner's Manual

1A-255 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.
• No abnormal air drawn in from 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.

Repair Instructions

1) Connect SUZUKI scan tool to DLC (1) with ignition
switch turned OFF.
S5JB0A1106001
Special tool
(A): SUZUKI scan tool
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, inspect electric
throttle body assembly referring to "Electric Throttle
Body Assembly On-Vehicle Inspection: in Section
1C".
Engine idle speed and IAC throttle opening
For J20 engine
For M16 engine
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.
(A)
A/C OFF
650 ± 50 rpm
5 – 55%
660 ± 50 rpm
5 – 55%
1
I5JB0A110106-01
A/C ON
750 ± 50 rpm
750 ± 50 rpm