Fuel Supply System

Fuel Pump Circuit Troubleshooting (cont'd)

 11-46  

  1. Reinstall the PGM-FI main relay 2.
  2. Turn the ignition switch ON (II).
  3. Measure voltage between ECM/PCM connector terminal E1 and body ground.

ECM/PCM 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.
  2. Reconnect ECM/PCM connector E (31P).
  3. Turn the ignition switch ON (II) and measure voltage between ECM/PCM connector terminal E1 and body ground within the first 2 seconds after the ignition switch was turned ON (II).

ECM/PCM CONNECTOR E (31P)

Wire side of female terminals

Is there battery voltage?

YES - Substitute a known-good ECM/PCM and recheck, refer to the '01 Civic Shop Manual on this CD (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM.

NO - Go to step 15.
  1. Turn the ignition switch OFF.
  2. Remove the rear seat cushion, refer to the '01 Civic Shop Manual on this CD (see page 20-237).
  3. Remove the access panel from the floor.
  4. 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.

  1. Turn the ignition switch OFF.
  2. Remove the PGM-FI main relay 2.