Trouble Diagnoses — Diagnostic Table (Cont'd) — Symptom & Condition 22: Engine stall — while decelerating/just after stopping
EF & EC-60flowchartDiagnostic Table (Cont'd)
SYMPTOM & CONDITION 22 — Engine stall — while decelerating/just after stopping
Possible Causes Matrix
SPECIFICATIONS
Possible CausesMixture ratio
①
②
③
④
⑤O
⑥O
SPECIFICATIONS
Possible CausesIgnition sparks (missing)
①O
②
③
④
⑤
⑥
SPECIFICATIONS
Possible CausesIdle speed (too low)
①
②
③O
④
⑤
⑥
IGNITION SYSTEM
Possible Causes(missing)
①O
②O
③
④
⑤
⑥
INTAKE SYSTEM
Possible CausesA.A.C. valve
①
②
③O
④O
⑤
⑥
CONTROL SYSTEM
Possible CausesExhaust gas sensor
①
②
③
④
⑤O
⑥O
CONTROL SYSTEM
Possible CausesCrank angle sensor
①
②O
③
④
⑤
⑥
CONTROL SYSTEM
Possible CausesIdle switch (remaining OFF)
①
②
③O
④
⑤
⑥
SERVICE PROCEDURE
Service Procedure Flowchart — Symptom 22
1
① CHECK — Check flashes of timing light while decreasing engine speed. [Tool: KV109D10S0, Power transistor unit, SEF418H]
N.G.
② PERFORM — Self-diagnosis Mode V. Perform self-diagnosis Mode V (for ignition signal and crank angle sensor). [SEF285G]
O.K.
③ MEASURE — Measure idle speed. [Tachometer, SEF316G]
O.K. (continue to ⑤)
2
⑤ CHECK — Self-diagnosis Mode II. Check mixture ratio by flashes of inspection lamps. (9 times or more/10 sec at 2,000 rpm) [SEF373G]
N.G.
3
⑥ DISCONNECT — Disconnect exhaust gas sensor connector, and try to drive. [Exhaust gas sensor, SEF307G]
No change
No change → Check idle mixture ratio. [See page EF & EC-25.]
Improved
Improved → Replace the sensor.
See also
EF & EC-25IDLE SPEED/IGNITION TIMING/IDLE MIXTURE RATIO INSPECTIONEF & EC-82Diagnostic Procedure 2 — CRANK ANGLE SENSOR (Code No. 11)EF & EC-90Trouble Diagnoses — Diagnostic Procedure 6: IGNITION SIGNAL (Code No. 21) & DETONATION SENSOR (Code No. 34)EF & EC-106Diagnostic Procedure 12 — AUXILIARY AIR CONTROL (A.A.C.) VALVE (Not self-diagnostic item)