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
| Category | Possible Causes | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|
| SPECIFICATIONS | Mixture ratio (too lean) | O | O | |||||
| SPECIFICATIONS | Ignition sparks (weak, missing) | O | O | |||||
| SPECIFICATIONS | Ignition timing | O | ||||||
| FUEL SYSTEM | Fuel pump (no operation) | O | ||||||
| FUEL SYSTEM | Fuel pump relay (open circuited) | O | ||||||
| FUEL SYSTEM | Injectors (no operation, clogged) | O | ||||||
| IGNITION SYSTEM | Ignition switch | O | O | O | O | O | ||
| IGNITION SYSTEM | E.C.C.S. relay | O | O | O | O | O | ||
| IGNITION SYSTEM | Power transistor | O | O | O | ||||
| IGNITION SYSTEM | Ignition coil | O | O | |||||
| IGNITION SYSTEM | Spark plugs | O | ||||||
| CONTROL SYSTEM | Crank angle sensor | O | O | O | O | O |
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
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