TROUBLESHOOTING GUIDE — 11 HIGH IDLE SPEED — AFTER WARM-UP
F-36spec table11 HIGH IDLE SPEED — AFTER WARM-UP
NOTE
[TROUBLESHOOTING HINTS] Excessive intake air supplied to engine. (1) Throttle valve not fully closed. (2) Idle speed control malfunction: Air valve not closing; ISC valve stuck; Incorrect coolant temperature signal.
Troubleshooting steps 1-4
1
INSPECTIONCheck if throttle valve is fully closed when accelerator released
RESULTYes
ACTIONGo to Step 3
1
INSPECTIONCheck if throttle valve is fully closed when accelerator released
RESULTNo
ACTIONCheck if throttle linkage is correctly installed and operates freely — page F-96; If OK, go to Step 2; If not OK, clean, adjust or replace linkage — page F-96
2
INSPECTIONCheck if dashpot is correctly adjusted — page F-121; Dashpot set speed: 2,500 ± 150 rpm
RESULTYes
ACTIONCheck if throttle valve is contaminated; If contaminated, clean throttle body — page F-94; If not contaminated, replace throttle body — page F-94
2
INSPECTIONCheck if dashpot is correctly adjusted — page F-121; Dashpot set speed: 2,500 ± 150 rpm
RESULTNo
ACTIONAdjust — page F-121
3
INSPECTIONCheck if '00' is displayed on Self-Diagnosis Checker with ignition switch ON — page F-78
RESULTYes
ACTIONGo to next step
3
INSPECTIONCheck if '00' is displayed on Self-Diagnosis Checker with ignition switch ON — page F-78
RESULTNo
ACTIONMalfunction Code No. displayed: Check for cause (Refer to specified check sequence) — page F-80. "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
4
INSPECTIONCheck switches for correct operation with Self-Diagnosis Checker Monitor Lamp and ignition switch ON — page F-89
RESULTYes
ACTIONGo to next step
4
INSPECTIONCheck switches for correct operation with Self-Diagnosis Checker Monitor Lamp and ignition switch ON — page F-89
RESULTNo
ACTIONLamp not ON/OFF with specified switch: Check for cause (Refer to specified check sequence) — page F-90. Lamp always ON: Check wiring between ECU terminal 1D and Self-Diagnosis Checker — page F-7
See also
F-96INTAKE AIR SYSTEMF-121DECELERATION CONTROL SYSTEMF-94INTAKE AIR SYSTEMF-78SELF-DIAGNOSIS FUNCTIONF-80SELF-DIAGNOSIS FUNCTIONF-128CONTROL SYSTEM - Engine Control Unit Terminal Voltage TableF-127CONTROL SYSTEM - Engine Control Unit InspectionF-7OUTLINE - WIRING DIAGRAMF-89SELF-DIAGNOSIS FUNCTIONF-90SELF-DIAGNOSIS FUNCTION