TROUBLE DIAGNOSES — Diagnostic Table (Cont'd): Impossible to start — no combustion
EF & EC-39flowchartDiagnostic Table (Cont'd)
Symptom & Condition 1: Impossible to start — no combustion
SPECIFICATIONS
Possible CausesMixture ratio (too lean)
1O
2O
3
4
5
6
7
SPECIFICATIONS
Possible CausesIgnition sparks (weak, missing)
1
2
3
4O
5O
6
7
SPECIFICATIONS
Possible CausesIgnition timing
1
2
3
4
5
6O
7
FUEL SYSTEM
Possible CausesFuel pump (no operation)
1O
2
3
4
5
6
7
FUEL SYSTEM
Possible CausesFuel pump relay (open circuited)
1O
2
3
4
5
6
7
FUEL SYSTEM
Possible CausesInjectors (no operation, clogged)
1
2O
3
4
5
6
7
IGNITION SYSTEM
Possible CausesIgnition switch
1O
2O
3O
4O
5
6O
7
IGNITION SYSTEM
Possible CausesE.C.C.S. relay
1O
2O
3O
4O
5
6O
7
IGNITION SYSTEM
Possible CausesPower transistor
1
2
3O
4O
5
6O
7
IGNITION SYSTEM
Possible CausesIgnition coil
1
2
3
4O
5O
6
7
IGNITION SYSTEM
Possible CausesSpark plugs
1
2
3
4
5O
6
7
CONTROL SYSTEM
Possible CausesCrank angle sensor
1O
2O
3
4O
5
6O
7O
SERVICE PROCEDURE
Service Procedure — Impossible to start, no combustion
1
Step 1 — LISTEN: Listen for fuel pump operating sound. (Fuel pump, SEF279G)
N.G.
N.G. → Check fuel pump and/or related circuits. [See page EF & EC-102.]
O.K.
2
Step 2 — LISTEN: Listen for injector operating sound. (Injector, SEF280G)
N.G.
N.G. → Check injector circuit. [See page EF & EC-112.]
O.K.
3
Step 3 — CHECK: Make sure tachometer needle moves when cranking. (Tachometer, Ignition switch, SEF281G — START position)
O.K.
4
Step 4 — CHECK: Check flashes of timing light for weakness. (Power transistor unit KV109D10S0, SEF418H)
N.G.
N.G. → Check ignition signal circuit. [See page EF & EC-90.]
O.K.
5
Step 5 — CHECK: Remove spark plugs and check their ignition sparks. (Ignition coil, Spark plug, SEF428H)
O.K.
6
Step 6 — CHECK: Check ignition timing. (Timing light, SEF284G)
N.G.
N.G. → Adjust ignition timing. [See page EF & EC-22.]
O.K.
7
Step 7 — PERFORM: Perform self-diagnosis Mode III (for crank angle sensor). (Self-diagnosis Mode III, SEF285G)
N.G.
8
N.G. → Check crank angle sensor and/or related circuits. [See page EF & EC-82.]
See also
EF & EC-102Diagnostic Procedure 10 — FUEL PUMP (Not self-diagnostic item)EF & EC-112TROUBLE DIAGNOSES — Diagnostic Procedure 15 — INJECTOR (Not self-diagnostic item)EF & EC-90Trouble Diagnoses — Diagnostic Procedure 6: IGNITION SIGNAL (Code No. 21) & DETONATION SENSOR (Code No. 34)EF & EC-22Direct Ignition System (Cont'd) — Checking Ignition Timing and Idle SpeedEF & EC-82Diagnostic Procedure 2 — CRANK ANGLE SENSOR (Code No. 11)