Integra L4-1678cc 1.7L DOHC (VTEC) FI (1992)
Main Relay (Computer/Fuel System): Testing and Inspection
PGM-FI Main Relay Test
Main Relay Test
NOTE: If the car starts and continues to run, the main relay is OK.
1. Remove the main relay.
2. Attach the battery positive terminal to the No. 4 terminal and the battery negative terminal to the No. 8 terminal of the main relay. Then check for
continuity between the No. 5 terminal and No. 7 terminal of the main relay.
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If there is continuity, go on to step 3.
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If there is no continuity, replace the relay and retest.
3. Attach the battery positive terminal to the No. 5 terminal and the battery negative terminal to the No. 2 terminal of the main relay. Then check that
there is continuity between the No. 1 terminal and No. 3 terminal of the main relay.
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If there is continuity, go on to step 4.
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If there is no continuity, replace the relay and retest.
4. Attach the battery positive terminal to the No. 3 terminal and battery negative terminal to the No. 8 terminal of the main relay. Then check that
there is continuity between the No. 5 terminal and No. 7 terminal of the main relay.
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If there is continuity, the relay is OK;
If the fuel pump still does not work, go to Harness Test.
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If there is no continuity, replace the relay and retest.