Suzuki Jimny Service Manual page 471

6-114 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Table B-4 Idle Air Control System Check
1. Main fuse 2. Fuse box
INSPECTION
Step
1 Check engine idle speed and IAC duty referring to
"Idle Speed / IAC Duty Inspection" in Section 6E.
Is idle speed within specification?
2 Is IAC duty within specification in Step 1?
3. Main relay 4. IAC valve
Action Yes
Go to Step 2.
Go to Step 3.
No
Go to Step 4.
Check for followings :
• Vacuum leak
• EVAP canister purge
control system
• Clog of IAC air pas-
sage
• Accessory engine
load
• Closed throttle posi-
tion (TP sensor)
• Stuck of PCV valve