TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) — Symptom & Condition 13: Unstable idling — after warm-up
EF & EC-51flowchartDiagnostic Table (Cont'd)
SYMPTOM & CONDITION 13 — Unstable idling — after warm-up
Diagnostic Table — Symptom 13: Unstable idling after warm-up
| System | Possible Causes | ① | ② | ③ | ④ | ⑤ | ⑥ | ⑦ | ⑧ | ⑨ |
|---|---|---|---|---|---|---|---|---|---|---|
| SPECIFICATIONS | Mixture ratio | O | O | O | O | |||||
| SPECIFICATIONS | Ignition sparks | O | O | |||||||
| SPECIFICATIONS | Ignition timing | O | ||||||||
| SPECIFICATIONS | Compression pressure | O | ||||||||
| FUEL SYSTEM | Fuel line (clogged) | |||||||||
| FUEL SYSTEM | Canister (air leaks) | O | ||||||||
| FUEL SYSTEM | Pressure regulator control solenoid | O | ||||||||
| IGNITION SYSTEM | Power transistor | O | O | |||||||
| IGNITION SYSTEM | Ignition coil | O | O | |||||||
| INTAKE SYSTEM | Blow-by hose (leaks) | O | ||||||||
| INTAKE SYSTEM | Air duct (leaks) | O | ||||||||
| CONTROL SYSTEM | Idle switch | O |
SPECIFICATIONS
Possible CausesMixture ratio
①O
②O
③O
④O
⑤
⑥
⑦
⑧
⑨
SPECIFICATIONS
Possible CausesIgnition sparks
①
②
③
④
⑤O
⑥O
⑦
⑧
⑨
SPECIFICATIONS
Possible CausesIgnition timing
①
②
③
④
⑤
⑥
⑦O
⑧
⑨
SPECIFICATIONS
Possible CausesCompression pressure
①
②
③
④
⑤
⑥
⑦
⑧O
⑨
FUEL SYSTEM
Possible CausesFuel line (clogged)
①
②
③
④
⑤
⑥
⑦
⑧
⑨
FUEL SYSTEM
Possible CausesCanister (air leaks)
①
②
③O
④
⑤
⑥
⑦
⑧
⑨
FUEL SYSTEM
Possible CausesPressure regulator control solenoid
①
②
③
④O
⑤
⑥
⑦
⑧
⑨
IGNITION SYSTEM
Possible CausesPower transistor
①
②
③
④
⑤O
⑥O
⑦
⑧
⑨
IGNITION SYSTEM
Possible CausesIgnition coil
①
②
③
④
⑤O
⑥O
⑦
⑧
⑨
INTAKE SYSTEM
Possible CausesBlow-by hose (leaks)
①O
②
③
④
⑤
⑥
⑦
⑧
⑨
INTAKE SYSTEM
Possible CausesAir duct (leaks)
①
②O
③
④
⑤
⑥
⑦
⑧
⑨
CONTROL SYSTEM
Possible CausesIdle switch
①
②
③
④
⑤
⑥
⑦
⑧
⑨O
SERVICE PROCEDURE
Service Procedure — Unstable idling after warm-up
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