TROUBLE DIAGNOSES — Diagnostic Table (Cont'd) — Symptom 2: Impossible to start — partial combustion
EF & EC-40flowchartDiagnostic Table (Cont'd)
SYMPTOM & CONDITION 2 — Impossible to start — partial combustion
Possible Causes vs. Check Step Matrix
| POSSIBLE CAUSES | 1 | 2 | 3 | 4 | 5 | |
|---|---|---|---|---|---|---|
| SPECIFICATIONS | Mixture ratio | O | O | O | ||
| SPECIFICATIONS | Fuel pressure (too low) | O | ||||
| SPECIFICATIONS | Ignition timing | O | ||||
| FUEL SYSTEM | Fuel pump | O | ||||
| FUEL SYSTEM | Fuel pump relay (open circuited) | O | ||||
| FUEL SYSTEM | Injectors (clogged) | O |
SPECIFICATIONS
POSSIBLE CAUSESMixture ratio
1O
2O
3O
4
5
SPECIFICATIONS
POSSIBLE CAUSESFuel pressure (too low)
1
2
3
4O
5
SPECIFICATIONS
POSSIBLE CAUSESIgnition timing
1
2
3
4
5O
FUEL SYSTEM
POSSIBLE CAUSESFuel pump
1O
2
3
4
5
FUEL SYSTEM
POSSIBLE CAUSESFuel pump relay (open circuited)
1O
2
3
4
5
FUEL SYSTEM
POSSIBLE CAUSESInjectors (clogged)
1
2O
3
4
5
SERVICE PROCEDURE
Diagnostic Service Procedure — Symptom 2: Impossible to start — partial combustion
Rendering diagram…