Diagnostic Aids
Perform this test only when directed here by QUICK TEST or SYMPTOM DIAGNOSIS. This test is intended to diagnose the following:
- Fuel supply system.
- Engine vacuum.
- Fuel pressure.
- Fuel filter.
- Fuel return.
- Fuel supply.
- Fuel injectors.
NOTE:
See SYMPTOM DIRECTORY table for proper diagnostic step.
SYMPTOM DIRECTORY
| Symptom | Go To Step |
|---|---|
| Fuel System Pressure Test | 1) |
| No Fuel Pressure | 3) |
| Low Fuel Pressure | 20) |
| High Fuel Pressure | 30) |
| Fuel Injector Test | 40) |
INERTIA FUEL SHUTOFF SWITCH TESTING
| Switch Condition | Resistance |
|---|---|
| Open (Tripped) | More Than 10 k/ohms |
| Closed (Set) | Less Than 5 Ohms |