## Fuel Supply System

#### Fuel Pump Circuit Troubleshooting (cont'd)

11-113

1. Check for continuity between the PGM-FI main relay 2 4P connector terminal No. 3 and ECM connector terminal E1.

Is there continuity?

YES - Go to step 9.

NO - Repair open in the wire between the PGM-FI main relay 2 and the ECM (E1).

1. Reinstall the PGM-FI main relay 2.

1. Turn the ignition switch ON (II).

1. Measure voltage between ECM connector terminal E1 and body ground.

ECM CONNECTOR E (31P)

Wire side of female terminals

Is there battery voltage?

YES - Go to step 12.

NO - Replace the PGM-FI main relay 2.

1. Turn the ignition switch OFF.

1. Reconnect ECM connector E (31P).

1. Turn the ignition switch ON (II), and measure voltage between ECM connector terminal E1 and body ground within the first 2 seconds after the ignition switch was turned ON (II).

ECM CONNECTOR E (31P)

Wire side of female terminals

Is there battery voltage?

YES - Substitute a known-good ECM and recheck (see page 11-5). If symptom/indication goes away, replace the original ECM.

NO - Go to step 15.

1. Turn the ignition switch OFF.

1. Remove the rear seat cushion, refer to the 2001 Civic 3-door Shop Manual (see page 20-40).

1. Remove the access panel from the floor.

1. Measure voltage between the fuel pump 5P connector terminal No. 5 and body ground within the first 2 seconds after the ignition switch was turned ON (II).

FUEL PUMP 5P CONNECTOR

Wire side of female terminals

Is there battery voltage?

YES - Go to step 24.

NO - Go to step 19.

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