( TL19E20A20326934595FAAT00 )

Injector Test

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

1. Try to start the engine.
   - If the engine starts, go to Step 2 .
   - If the engine does not start, go to Step 8 .

1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.

1. Make sure the HDS communicates with the ECM/PCM. If it doesn't, go to the DLC circuit troubleshooting.

1. Select ONE INJECTOR in INSPECTION MENU with the HDS.

1. Disable each injector at a time by selecting number of an injector which you want to step.

1. 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, faulty injector is suspected. Replace the injector and retest.

1. 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.
   - 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 1 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.

1. Turn the ignition switch to LOCK (0).

1. Disconnect the injector connector.

1. Measure the resistance between injector (A) terminals No. 1 and No. 2. There should be 10−13 Ω.
   - If the resistance is OK, go to Step 11 .
   - If the resistance is not as specified, replace the injector.

1. Check the fuel pressure.
   - 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 1 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.