## PGM-FI System

#### Injector Test

11-552

NOTE: Check the following items before testing: idle speed, ignition timing and idle CO%.

1. Try to start the engine.

Does the engine start?

YES | - Go to step 2.
NO | - Go to step 6.

2. Turn the ignition switch OFF. Remove the air cleaner (see page 11-446).
3. Disconnect each injector connector individually.
4. Install the air cleaner, and inspect the change in the idle speed.

- If the idle speed drop is almost the same for each cylinder, the fuel injectors are normal.
- If the idle speed or quality remains the same when you disconnect a particular injector, replace the injector and retest (see page 11-413).

5. Check the clicking sound of each injector by means of a stethoscope when the engine is idling.

- If any fuel injector fails to make the typical clicking sound, check the sound again after replacing the injector (see page 11-413).
- If clicking sound is still absent, check the following.

- Whether there is wire breakage or poor connection in the YEL/BLK wire between the PGM-FI main relay and the junction connector.
- Whether the junction connector is open or corroded.
- Whether there is wire breakage or poor connection in the YEL/BLK wire between the junction connector and the injector.
- Whether there is any short-circuiting, wire breakage or poor connection in the wire between the injector and the ECM/PCM.

- If all is OK, the test is complete.

6. Turn the ignition switch OFF.
7. Remove the air cleaner (see page 11-446).
8. Remove the injector connector.
9. Measure the resistance between injector (A) terminals No. 1 and No. 2.

Is there 10-13 ohms?

YES | - Go to step 10.
NO | - Replace the injector (see page 11-413).

10. Check the fuel pressure (see page 11-431).

- If the fuel pressure is as specified, check the following:

- Whether there is wire breakage, or poor connection in the YEL/BLK wire between the PGM-FI main relay and the junction connector.
- Whether the junction connector is open or corroded.
- Whether there is wire breakage, or poor connection in the YEL/BLK wire between the junction connector and the injector.
- Whether there is any short-circuiting, wire breakage or poor connection in the wire between the injector and the ECM/PCM.

- If the fuel pressure is not as specified, recheck the fuel pressure (see page 11-431).