Contents: Description ⇊ Testing the relay ⇊
Description
The PGM-I main relay is actually two separate relays. It is located under the instrument panel on the driver's side. One relay is energized when the ignition key is turned to the ON position and supplies battery voltage to the ECM/PCM, power to the fuel injectors, and the second relay. The second relay is energized for two seconds when the ignition key is turned to the ON position and while the engine is running and supplies power to the fuel pump (diagram on the upper right).
Testing the relay
Note: If the engine starts and continues to run, the PGM-FI main relay is OK.
1. Remove the PGM-FI main relay.
2. Connect the positive battery terminal to terminal No.2 and the negative battery terminal to terminal No.1 of the PGM-FI main relay. Then check the continuity between terminal No.5 and terminal No.4 of the PGM-FI main relay.
- If there is conductivity, proceed to step 3.
- If there is no continuity, replace the PGM-FI main relay and retest.
3. Connect the positive battery terminal to terminal No.5 and the negative battery terminal to terminal No.3 of the PGM-FI main relay. Then check the continuity between terminal No.7 and terminal No.6 of the PGM-FI main relay.
- If there is conductivity, proceed to step 4.
- If there is no continuity, replace the PGM-FI main relay and retest.
4. Connect the positive battery terminal to terminal No.6 and the negative battery terminal to terminal No.1 of the PGM-FI main relay. Then check the continuity between terminal No.5 and terminal No.4 of the PGM-FI main relay.
- If there is continuity, the PGM-FI main relay is OK.
- If there is no continuity, replace the PGM-FI main relay and retest.
The text of the article is available on the website: HONDABOOK