Description
The PGM-I main relay actually consists of two separate relays. It is located under the dashboard on the driver's side. One relay energizes when the ignition key is turned to the ON position and provides battery voltage to the ECM/PCM, power to the fuel injectors, and a 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 (top right diagram).
Relay testing
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 #2 and the negative battery terminal to terminal #1 of the PGM-FI main relay. Then check for continuity between terminal #5 and terminal #4 of the PGM-FI main relay.
- If there is continuity, go to step 3.
- If there is no continuity, replace the PGM-FI main relay and retest.
3. Connect the positive battery terminal to terminal #5 and the negative battery terminal to terminal #3 of the PGM-FI main relay. Then check for continuity between terminal #7 and terminal #6 of the PGM-FI main relay.
- If there is continuity, go to step 4.
- If there is no continuity, replace the PGM-FI main relay and retest.
4. Connect the positive battery terminal to terminal #6 and the negative battery terminal to terminal #1 of the PGM-FI main relay. Then check for continuity between terminal #5 and terminal #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.