Suzuki 2000 Grand Vitara SQ416, Руководство по обслуживанию

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YH4
GRAND
VITARA
ENGINE AND EMISSION CONTROL SYSTEM (G16 / J20 ENGINES) 6E1-19
1. DLC
IDLE SPEED/IDLE AIR CONTROL (IAC) DUTY
INSPECTION
Before idle speed and IAC duty check, make sure of the following.
Lead wires and hoses of engine / emission control systems are
connected securely.
Accelerator cable has some play, that is, it is not tight.
Valve lash is checked and adjusted according to maintenance
schedule.
Ignition timing is within specification.
All accessories (wipers, heater, lights, A / C, etc.) are out of ser-
vice.
Air cleaner has been properly installed and is in good condition.
ECM (PCM) does not detect any malfunction DTC.
After above items are all confirmed, check idle speed and IAC duty
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 with ignition switch OFF.
Special Tool
(A): SUZUKI scan tool, Tech 1
(B): Mass storage cartridge
(C): 16 / 14 pin DLC cable (OBD-
II adapter cable)
2) Warm up engine to normal operating temperature.
3) Check idle speed and IAC duty by using “Data List” mode of SU-
ZUKI scan tool.
A / C OFF A / C ON
Engine idle speed 750 50 r / min.
850 50 r / min.
for G16
IAC duty at specified idle speed 2 – 30 %
800 50 r / min.
for J20
If idle speed and / or IAC duty is out of specifications, check idle
air control system referring to “Diagnostic Flow Table B-4 Idle Air
Control System Check” in “ENGINE DIAGNOSIS” section.
4) Check that specified engine idle speed is obtained with A / C ON
if vehicle is equipped with A / C.
If not, check A / C signal circuit and idle air control system.