Trouble Diagnoses — Diagnostic Table (Cont'd) — Symptom & Condition 12: Unstable idling — before warm-up
EF & EC-50flowchartDiagnostic Table (Cont'd)
SYMPTOM & CONDITION 12 — Unstable idling — before warm-up
Possible Causes — Symptom & Condition 12: Unstable idling — before warm-up
SPECIFICATIONS
Possible CausesMixture ratio
①
②O
③O
④
⑤
⑥
SPECIFICATIONS
Possible CausesIgnition timing
①O
②
③
④
⑤
⑥
INTAKE SYSTEM
Possible CausesAir regulator (not open enough)
①
②O
③
④
⑤
⑥
INTAKE SYSTEM
Possible CausesA.A.C. valve
①
②
③
④O
⑤
⑥
CONTROL SYSTEM
Possible CausesEngine temperature sensor
①
②
③
④
⑤O
⑥O
SERVICE PROCEDURE
Service Procedure — Unstable idling before warm-up
Rendering diagram…
Related references
See also
EF & EC-22Direct Ignition System (Cont'd) — Checking Ignition Timing and Idle SpeedEF & EC-25IDLE SPEED/IGNITION TIMING/IDLE MIXTURE RATIO INSPECTIONEF & EC-86Diagnostic Procedure 4 — ENGINE TEMPERATURE SENSOR (Code No. 13)EF & EC-106Diagnostic Procedure 12 — AUXILIARY AIR CONTROL (A.A.C.) VALVE (Not self-diagnostic item)EF & EC-110TROUBLE DIAGNOSES — Diagnostic Procedure 14: AIR REGULATOR (Not self-diagnostic item)