Honda CRX silhouetteCRX

Fuel Supply System — Fuel Pump: Testing

6-78prose procedure

Fuel Pump

Testing

  1. 1
    With the ignition switch OFF, disconnect the connector from the main relay at left side of the cowl.
  2. 2
    Connect the BLK/YEL wire and YEL/BLK wire with a jumper wire.
    Illustration under the dash/cowl showing the main relay connector with a magnified inset of its terminals; a jumper wire bridges the BLK/YEL and YEL/BLK wires.
  3. 3
    Relieve fuel pressure as described on page 6-71 then tighten the service bolt.
  4. 4
    Disconnect the fuel return hose from the regulator.
  5. 5
    Turn the ignition switch ON for 10 seconds and measure the amount of fuel flow. Amount should be: 230 cm³ (7.8 oz) min. in 10 seconds at 12V.
    Illustration of the pressure regulator and fuel hose discharging fuel into a graduated container to measure fuel flow.
Fuel flow
230 cm³ (7.8 oz) min. in 10 seconds at 12V
If you suspect a problem with the fuel pump, check that the fuel pump actually runs; when it is ON, you will hear some noise if you hold your ear to the fuel filler port with the fuel filler cap removed. If the pump does not make noise, check as follows:
  1. 1
    Remove the rear seat.
  2. 2
    Disconnect the 3P connector.
    CAUTION: Be sure to turn the ignition switch OFF before disconnecting the wires.
  3. 3
    Check that battery voltage is available at the fuel pump connector when the ignition switch is turned ON (positive probe to the YEL/BLK wire, negative probe to the BLK wire).
    Illustration of the fuel pump under the rear seat with a magnified inset of the fuel pump connector terminals showing the BLK and YEL/BLK wires.

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