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
| Category | Possible Causes | ① | ② | ③ | ④ | ⑤ | ⑥ |
|---|---|---|---|---|---|---|---|
| SPECIFICATIONS | Mixture ratio | O | O | ||||
| SPECIFICATIONS | Ignition timing | O | |||||
| INTAKE SYSTEM | Air regulator (not open enough) | O | |||||
| INTAKE SYSTEM | A.A.C. valve | O | |||||
| CONTROL SYSTEM | Engine temperature sensor | O | O |
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
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