Sfi System Fuel Pump Control Circuit

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
3Zr-Fae Engine Control System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

INSPECT INSTRUMENT PANEL JUNCTION BLOCK (C/OPN RELAY)

CHECK HARNESS AND CONNECTOR (C/OPN RELAY - ECM)

CHECK HARNESS AND CONNECTOR (C/OPN RELAY - INTEGRATION RELAY [EFI MAIN RELAY], IG2 RELAY)

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

CHECK HARNESS AND CONNECTOR (FUEL PUMP - BODY GROUND)

INSPECT FUEL PUMP

CHECK ECM POWER SOURCE CIRCUIT

SFI SYSTEM - Fuel Pump Control Circuit


DESCRIPTION

When the engine is cranked, current flows from terminal ST1 (STR) of the ignition switch (main body ECU) to the starter relay coil and current also flows to terminal STA of the ECM (STA signal).
When the STA signal and NE signal are input to the ECM, Tr is turned on, current flows to the coil of the circuit opening relay, the relay switches on, power is supplied to the fuel pump and the fuel pump operates.
While the NE signal is generated (engine running), the ECM keeps Tr on (circuit opening relay on) and the fuel pump also keeps operating.

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Fuel Pump Control Circuit


WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Fuel Pump Control Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following 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 ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the 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 SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (RAV4_ACA30 RM000000PDG0GRX.html)

2.INSPECT INSTRUMENT PANEL JUNCTION BLOCK (C/OPN RELAY)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Fuel Pump Control Circuit

  1. Disconnect the instrument panel junction block connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    IB-11 - IA-8
    		Battery voltage not applied to terminals IE-5 and IF-4
    		10 kΩ or higher
    Battery voltage applied to terminals IE-5 and IF-4
    		Below 1 Ω
    Text in Illustration
    *1
    		Component without harness connected
    (Instrument Panel Junction Block)

  1. Reconnect the instrument panel junction block connector.



NG
REPLACE INSTRUMENT PANEL JUNCTION BLOCK (C/OPN RELAY)
OK


3.CHECK HARNESS AND CONNECTOR (C/OPN RELAY - ECM)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Fuel Pump Control Circuit

  1. Disconnect the ECM connector.

  1. Disconnect the instrument panel junction block connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    IE-5 - A12-19 (FC)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    IE-5 or A12-19 (FC) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Instrument Panel Junction Block)
    *2
    		Instrument Panel Junction Block
    *3
    		Front view of wire harness connector
    (to ECM)

  1. Reconnect the ECM connector.

  1. Reconnect the instrument panel junction block connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (C/OPN RELAY - ECM)
OK


4.CHECK HARNESS AND CONNECTOR (C/OPN RELAY - INTEGRATION RELAY [EFI MAIN RELAY], IG2 RELAY)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Fuel Pump Control Circuit

  1. Remove the integration relay from the engine room No. 1 relay block.

  1. Disconnect the integration relay connector.

  1. Remove the ignition relay No. 2 (IG2).

  1. Disconnect the instrument panel junction block connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    1A-4 - IB-11
    		Always
    		Below 1 Ω
    Ignition relay No. 2 (IG2) terminal 5 - IF-4
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    1A-4 or IB-11 - Body ground
    		Always
    		10 kΩ or higher
    Ignition relay No. 2 (IG2) terminal 5 or IF-4 - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Integration Relay)
    *2
    		Engine Room No. 1 Relay Block
    *3
    		IG2
    *4
    		Front view of wire harness connector
    (to Instrument Panel Junction Block)

  1. Reconnect the instrument panel junction block connector.

  1. Reinstall the ignition relay No. 2 (IG2).

  1. Reconnect the integration relay connector.

  1. Reinstall the integration relay.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (C/OPN RELAY - INTEGRATION RELAY [EFI MAIN RELAY], IG2 RELAY)
OK


5.CHECK HARNESS AND CONNECTOR (C/OPN RELAY - FUEL PUMP)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Fuel Pump Control Circuit

  1. Disconnect the fuel pump connector.

  1. Disconnect the instrument panel junction block connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    IA-8 - T1-4
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    IA-8 or T1-4 - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Instrument Panel Junction Block)
    *2
    		Instrument Panel Junction Block
    *3
    		Front view of wire harness connector
    (to Fuel Pump)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (C/OPN RELAY - FUEL PUMP)
OK


6.CHECK HARNESS AND CONNECTOR (FUEL PUMP - BODY GROUND)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.Sfi System Fuel Pump Control Circuit

  1. Disconnect the fuel pump connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    T1-5 - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Fuel Pump)

  1. Reconnect the fuel pump connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PUMP - BODY GROUND)
OK


7.INSPECT FUEL PUMP

  1. Inspect the fuel pump (RAV4_ACA30 RM0000017RJ032X.html).



NG
REPLACE FUEL PUMP (RAV4_ACA30 RM0000017RJ032X.html)
OK


8.CHECK ECM POWER SOURCE CIRCUIT

  1. Check the ECM power source circuit (RAV4_ACA30 RM00000276902PX.html).



NG
REPAIR ECM POWER SOURCE CIRCUIT
OK

REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)