TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) — Symptom & Condition 5: Hard to start — before warm-up
EF & EC-43flowchartDiagnostic Table (Cont'd)
SYMPTOM & CONDITION 5 — Hard to start — before warm-up
Possible Causes vs. Check Step Matrix
SPECIFICATIONS
Possible CausesMixture ratio
1
2
3O
4
5
6O
IGNITION SYSTEM
Possible CausesIgnition switch (no start signal)
1O
2
3O
4
5
6
INTAKE SYSTEM
Possible CausesAir regulator
1
2
3O
4
5
6
CONTROL SYSTEM
Possible CausesEngine temperature sensor
1
2
3
4
5O
6O
CONTROL SYSTEM
Possible CausesIdle switch
1
2
3
4O
5
6
CONTROL SYSTEM
Possible CausesNeutral switch
1O
2
3
4
5
6
OTHERS
Possible CausesStarter (operation too slow)
1O
2
3
4
5
6
OTHERS
Possible CausesBattery (voltage too low)
1O
2O
3
4
5
6
SERVICE PROCEDURE
Hard to start — before warm-up Service Procedure
1
CHECK 1: Make sure tachometer indicates about 300 rpm while cranking. (Tachometer / Ignition switch — START) [SEF281G]
N.G.
2
MEASURE 2: Measure battery voltage. [SEF296G]
N.G. (less than 12V)
N.G. (less than 12V) — Charge the battery.
O.K.
3
CHECK 3: Make sure air regulator stays open before warm-up. [SEF293G]
N.G.
N.G. — Check air regulator and/or its circuit. [See page EF & EC-110.]
O.K.
4
PERFORM 4: Self-diagnosis Mode IV (for start signal and idle switch). [SEF285G]
N.G.
N.G. — Check the malfunctioning switches and/or circuits. [See page EF & EC-104 (start signal), page EF & EC-94 (idle switch).]
O.K.
5
PERFORM 5: Self-diagnosis Mode III (for engine temp. sensor). [SEF285G]
N.G.
6
CRANK 6: Start with engine temp. sensor connector disconnected. (Engine temp. sensor / Ignition switch — START) [SEF292G]
N.G.
N.G. — Check sensor circuit. [See page EF & EC-86 (engine temp. sensor).]
See also
EF & EC-110TROUBLE DIAGNOSES — Diagnostic Procedure 14: AIR REGULATOR (Not self-diagnostic item)EF & EC-104Diagnostic Procedure 11 — START SIGNAL (Switch ON/OFF diagnosis)EF & EC-94Diagnostic Procedure 7 — IDLE SWITCH (Switch ON/OFF diagnosis)EF & EC-86Diagnostic Procedure 4 — ENGINE TEMPERATURE SENSOR (Code No. 13)