Sfi System Fuel Pump Control Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (FUEL PUMP/SPD)

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (C/OPN RELAY INPUT VOLTAGE)

CHECK WIRE HARNESS (INSTRUMENT PANEL JUNCTION BLOCK - INTEGRATION RELAY AND IG2 RELAY)

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (C/OPN RELAY)

CHECK WIRE HARNESS (INSTRUMENT PANEL JUNCTION BLOCK - ECM)

PERFORM ACTIVE TEST USING INTELLIGENT TESTER

INSPECT F/PMP RELAY

CHECK WIRE HARNESS (F/PMP RELAY - ECM AND INSTRUMENT PANEL JUNCTION BLOCK)

CHECK WIRE HARNESS (F/PMP - FUEL PUMP AND PUMP RESISTOR)

INSPECT FUEL PUMP

INSPECT FUEL PUMP RESISTOR

READ VALUE USING INTELLIGENT TESTER (STARTER SIG)

READ VALUE USING INTELLIGENT TESTER (ENGINE SPD)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Connect the intelligent tester to the DLC3.
   

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

3. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.
   

4. Check whether the fuel pump operating sound occurs when performing the Active Test on the tester.
   

   OK:

   Fuel pump operating sound occurs.
   

1. Measure the voltage between the terminal of the instrument panel junction block and the body ground when the ignition switch is turned ON and OFF.
   

   Standard voltage:

   Tester Connection	Ignition Switch Condition	Specified Condition
   IB-11 - Body ground	OFF	Below 1 V
   IF-4 - Body ground
   IB-11 - Body ground	ON	9 to 14 V
   IF-4 - Body ground

1. Remove the integration relay and IG2 relay from the engine room No. 1 relay block.
   

2. Disconnect the instrument panel junction block connector.
   

3. Measure the resistance.
   

   Standard resistance:

   Tester Connection	Specified Condition
   IG2 relay 5 - IF-4	Below 1 Ω
   1A-4 - IB-11	Below 1 Ω
   IF-4 - Body ground	10 kΩor higher
   IB-11 - Body ground	10 kΩor higher

4. Reinstall the integration relay and IG2 relay.
   

5. Reconnect the instrument panel junction block connector.
   

1. Remove the instrument panel junction block.
   

2. Measure the C/OPN relay resistance.
   

   Standard resistance:

   Tester Connection	Specified Condition
   IB-11 - IA-8	10 kΩ or higher
   	Below 1 Ω (When battery voltage is applied to terminals IF-4 and IE-5)

   HINT:

   Relay coil circuit between IF-4 and IE-5 is through IGN fuse.

3. Reinstall the instrument panel junction block.
   

1. Disconnect the ECM connector.
   

2. Disconnect the IE connector from the instrument panel junction block.
   

3. Measure the resistance.
   

   Standard resistance:

   Tester Connection	Specified Condition
   IE-5 - A12-7 (FC)	Below 1Ω
   IE-5 or A12-7 (FC) - Body ground	10 kΩ or higher

4. Reconnect the instrument panel junction block and the ECM connectors.
   

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch ON and turn the tester on.
   

3. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.
   

4. Check the operation of the relay while operating it using the intelligent tester.
   

   OK:

   Operating noise can be heard from the relay.
   

1. Inspect the F/PMP relay (RAV4_ACA30 RM000001GHH01GX.html).
   

1. Remove the F/PMP relay from the engine room No. 1 relay block.
   

2. Disconnect the ECM connector.
   

3. Disconnect the IA instrument panel junction block connector.
   

4. Measure the resistance.
   

   Standard resistance:

   Tester Connection	Specified Condition
   F/PMP relay terminal 1 - B96-59 (FPR)	Below 1 Ω
   F/PMP relay terminal 2 - IA-8	Below 1 Ω
   F/PMP relay terminal 3 - IA-8	Below 1 Ω
   F/PMP relay terminal 1 or B96-59 (FPR) - Body ground	10 kΩ or higher
   F/PMP relay terminal 2 or IA-8 - Body ground	10 kΩ or higher
   F/PMP relay terminal 3 or IA-8 - Body ground	10 kΩ or higher

5. Reconnect the ECM connector
   

6. Reconnect the instrument panel junction block connector.
   

7. Reinstall the F/PMP relay.
   

1. Remove the F/PMP relay from the engine room No. 1 relay block.
   

2. Disconnect the fuel pump connector.
   

3. Disconnect the fuel pump resistor connector.
   

4. Measure the resistance.
   

   Standard resistance:

   Tester Connection	Specified Condition
   F/PMP relay terminal 4 - T1-4	Below 1 Ω
   F/PMP relay terminal 5 - A63-1	Below 1 Ω
   A63-2 - T1-4	Below 1 Ω
   T1-5 - Body ground	Below 1 Ω
   F/PMP relay terminal 4 or T1-4 - Body ground	10 kΩ or higher
   F/PMP relay terminal 5 or A63-1 - Body ground	10 kΩ or higher
   A63-2 or T1-4 - Body ground	10 kΩ or higher

5. Reconnect the fuel pump resistor connector.
   

6. Reconnect the fuel pump connector.
   

7. Reinstall the F/PMP relay.
   

1. Inspect fuel pump resistance.
   

   1. Measure the resistance between the terminals.
      

      Standard resistance:

      0.2 to 3.0 Ω at 20°C (68°F)
      

2. Inspect fuel pump operation.
   

   1. Apply the battery voltage to both the terminals. Check that the pump operates.
      

      NOTICE:

      1. These tests must be done quickly (within 10 seconds) to prevent the coil from burning out.
         
      2. Keep the fuel pump as far away from the battery as possible.
         
      3. Always turn the voltage on and off on the battery side, not the fuel pump side.
         

1. Measure the resistance of the fuel pump resistor.
   

   Standard resistance:

   0.30 to 0.34 Ω at 20°C (68°F)
   

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch ON and turn the tester on.
   

3. Select the following menu items: Powertrain / Engine and ECT / Data List / Starter Signal.
   

4. Check the result when the ignition switch is turned ON and START.
   

   OK:

   Ignition Switch Position	STARTER SIG
   ON	OFF
   START	ON

1. Connect the intelligent tester to the DLC3.
   

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

3. Select the following menu items: Powertrain / Engine and ECT / Data List / Engine Speed.
   

4. Read the values displayed on the tester while cranking.
   

   Standard:

   Values are displayed continuously.