Sfi System Fuel Pump Control Circuit

Engine. Camry. Acv40 Gsv40
2Gr-Fe Engine Control System. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE C/OPN RELAY)

CHECK ECM POWER SOURCE CIRCUIT

INSPECT ENGINE ROOM JUNCTION BLOCK (C/OPN RELAY)

INSPECT ECM (FC VOLTAGE)

INSPECT FUEL PUMP

CHECK HARNESS AND CONNECTOR (C/OPN RELAY - FUEL PUMP - BODY GROUND)

SFI SYSTEM - Fuel Pump Control Circuit


DESCRIPTION

When the engine is cranked, the starter relay drive signal output from the STAR terminal of the ECM is input into the STA terminal of the ECM, and a NE signal generated by the crankshaft position sensor is also input into the NE+ terminal. Thus, the ECM interprets that the engine is cranked, and turns the transistor Tr1 in the ECM internal circuit ON. The current flows to the C/OPN (Circuit Opening) relay by turning the Tr1 ON. Then, the fuel pump operates.
While the NE signal is input into the ECM, when the engine is running, the ECM turns the Tr1 on continuously.

Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System.Sfi System Fuel Pump Control Circuit


WIRING DIAGRAM


Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System.Sfi System Fuel Pump Control Circuit


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE C/OPN RELAY)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position and turn the tester on.

  1. Select the following menu items: Powertrain / Engine / Active Test / Fuel Pump / Speed.

  1. Check whether the fuel pump operation sound occurs when performing the Active Test on the tester.

    OK:
    Fuel pump operating sound occurs.


NG
Go to step 2
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2.CHECK ECM POWER SOURCE CIRCUIT


NG
REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT
OK


3.INSPECT ENGINE ROOM JUNCTION BLOCK (C/OPN RELAY)


    Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System.Sfi System Fuel Pump Control Circuit

  1. Remove the integration relay from the engine room relay block.

  1. Inspect the C/OPN relay.

    1. Measure the C/OPN relay resistance.

      Standard resistance:
      Tester Connection
      		Specified Condition
      1E-7 - 1E-13
      		10 kΩ or higher
      Below 1 Ω
      (Apply battery voltage between terminals 1D-12 and 1E-8)

  1. Reinstall the integration relay.



NG
REPLACE ENGINE ROOM JUNCTION BLOCK
OK


4.INSPECT ECM (FC VOLTAGE)


    Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System.Sfi System Fuel Pump Control Circuit

  1. Disconnect the C58 (RHD) or C55 (LHD) and A24 (RHD) or A55 (LHD) ECM connectors.

  1. Measure the voltage between the terminals.

    Standard voltage:
    RHD:
    Tester Connection
    		Specified Condition
    FC (A24-7) - E1 (C58-81)
    		9 to 14 V
    LHD:
    Tester Connection
    		Specified Condition
    FC (A55-7) - E1 (C55-81)
    		9 to 14 V

  1. Reconnect the ECM connectors.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - BATTERY)
OK


5.INSPECT FUEL PUMP


NG
REPLACE FUEL PUMP (CAMRY_ACV40 RM000001IRA005X.html)
OK


6.CHECK HARNESS AND CONNECTOR (C/OPN RELAY - FUEL PUMP - BODY GROUND)


    Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System.Sfi System Fuel Pump Control Circuit

  1. Check the harness and the connectors between the engine room relay block and the fuel pump.

    1. Disconnect the integration relay connector.

    2. Disconnect the N10 fuel pump connector.

    3. Measure the resistance.

      Standard resistance:
      Check for open:
      Tester Connection
      		Specified Condition
      1E-13 - N10-4 (Fuel pump)
      		Below 1 Ω
      Check for short:
      Tester Connection
      		Specified Condition
      1E-13 or N10-4 (Fuel pump) - Body ground
      		10 kΩ or higher

  1. Check the harness and the connectors between the fuel pump and body ground.

    1. Disconnect the N10 fuel pump connector.

    2. Measure the resistance.

      Standard resistance :
      Check for open:
      Tester Connection
      		Specified Condition
      N10-5 (Fuel pump) - Body ground
      		Below 1 Ω

  1. Reconnect the integration relay connector.

  1. Reconnect the fuel pump connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (CAMRY_ACV40 RM0000022NT002X.html)