TROUBLESHOOTING GUIDE — 16. ENGINE STALLS AT IDLE — BEFORE WARM-UP
F-44flowchart16. ENGINE STALLS AT IDLE — BEFORE WARM-UP
Description
DESCRIPTION
ItemsEngine starts normally but vibrates excessively and stalls at idle before warm-up
NOTE
[TROUBLESHOOTING HINTS]
1) Low intake air amount
- Idle speed control malfunction
- Air cleaner element clogged
- Airflow meter stuck
2) Air/Fuel mixture too lean
- Air leakage of intake air system
3) Poor combustion of fuel
- Low RVP (summer) fuel used in cold weather
Troubleshooting Guide (Steps 1-4)
1
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)
No
2
Go to next step
3
Check switches for correct operation with Self-Diagnosis Checker Monitor Lamp with 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
4
Go to next step
5
Check if ECU terminal voltages are OK (2D, 2O and 2Q) (page F-129)
No
Check for cause (Refer to 'Check Point for Each Terminal') (page F-132)
Yes
6
Go to next step
7
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
8
Go to next step
See also
F-7OUTLINE - WIRING DIAGRAMF-78SELF-DIAGNOSIS FUNCTIONF-80SELF-DIAGNOSIS FUNCTIONF-89SELF-DIAGNOSIS FUNCTIONF-90SELF-DIAGNOSIS FUNCTIONF-93INTAKE AIR SYSTEMF-127CONTROL SYSTEM - Engine Control Unit InspectionF-128CONTROL SYSTEM - Engine Control Unit Terminal Voltage TableF-129CONTROL SYSTEM - Engine Control Unit Terminal Voltage Table (continued)F-132CONTROL SYSTEM - Check Point for Each Terminal (continued)