Summary of Contents for Honda Civic 1986 1987 Service Manual - Page 67

  • Honda Civic 1986 1987 Service Manual - Page 67

    Fuel System r— Main Relay Testing 1. Remove the main relay, near the under-dash fuse box, 2. Connect 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 Not 5 terminal and No. 7 terminal of the main relay. 0 If there is continuity, go on to step 3. I If there is no continuity, replace the relay. FUEL PUMP 3. Connect 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 ND, 3 terminal of the main relay. 0 If there is continuity, go on to step 4. o If there is no continuity, replace the relay. 4. Connect 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. 0 If there is continuity, the relay is OK. If the fuel pump still does not work, go to Harness Testing in the next column. 0 If there is no continuity, replace the relay. ’— Harness Testing 1, Keep the ignition switch in the OFF position. 2. Disconnect the main relay coupler. 3. Connect the positive probe of the circuit tester to the Yellow/White wire (D n the coupler and ground the negative probe of the tester to body ground. 0 Battery Voltage should be available. — ii there is no voltage, check the wiring between the battery and the main relay as well as the ECU fuse in the engine compartment. AWCDVELLow/wnlre 4. Connect the pos e terminal of the tester to the Black/Vellow wire @ oi the coupler and ground the negative terminal of the tester to body ground. 5. Turn the ignition switch ON. 0 The tester should indicate battery voltage. _ If there is no voltage, check the wiring from the ignition switch and the main relay asweli as fuse No. 4. i® sLACK/VELLW 11-44