TROUBLESHOOTING GUIDE — 15. ENGINE STALLS AT IDLE — ALWAYS
F-42flowchart15. ENGINE STALLS AT IDLE — ALWAYS
Description
DESCRIPTION
ItemsEngine starts normally but vibrates excessively and stalls at idle in every condition
NOTE
[TROUBLESHOOTING HINTS]
1) Incorrect idle speed
- Idle speed misadjustment
- Idle speed control malfunction
2) Air/Fuel mixture too rich or lean
- Injector clogged or inoperative
- Low fuel line pressure
- Low intake air amount or air leakage
3) Poor ignition spark
Troubleshooting Guide (Steps 1-4)
1
Check for correct intake manifold vacuum at idle. Vacuum: More than 450 mmHg (17.7 inHg)
No
Check for air leakage of intake air system components (page F-93)
Yes
2
Go to next step
3
Check if air cleaner element is clean (page F-75)
No
Replace air cleaner element (page F-92)
Yes
4
Go to next step
5
Check if '00' is displayed on Self-Diagnosis Checker with ignition switch ON (page F-78)
No
Malfunction Code No. displayed: Check for cause (Refer to specified check sequence) (page F-80)
No
'88' flashes: Check ECU terminal 1F voltage (page F-128). Voltage: Approx. 12V (Ignition switch ON). If OK, replace ECU (page F-127). If not OK, check wiring between ECU and Self-Diagnosis Checker (page F-7)
'88' flashes: Check ECU terminal 1F voltage (page F-128). Voltage: Approx. 12V (Ignition switch ON). If OK, replace ECU (page F-127). If not OK, check wiring between ECU and Self-Diagnosis Checker (page F-7)
Yes
6
Go to next step
7
Check switches for correct operation with Self-Diagnosis Checker Monitor Lamp and ignition switch ON (page F-89)
No
Lamp not ON/OFF with specified switch: Check for cause (Refer to specified check sequence) (page F-90)
No
Lamp always ON: Check wiring between ECU terminal 1D and Self-Diagnosis Checker (page F-7)
Yes
8
Go to next step
See also
F-7OUTLINE - WIRING DIAGRAMF-75ENGINE TUNE-UPF-78SELF-DIAGNOSIS FUNCTIONF-80SELF-DIAGNOSIS FUNCTIONF-89SELF-DIAGNOSIS FUNCTIONF-90SELF-DIAGNOSIS FUNCTIONF-92INTAKE AIR SYSTEMF-93INTAKE AIR SYSTEMF-127CONTROL SYSTEM - Engine Control Unit InspectionF-128CONTROL SYSTEM - Engine Control Unit Terminal Voltage Table