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Home >> Scion >> 2005 >> xA Automatic >> Repair and Diagnosis >> Engine Performance >> SFI System >> Fuel Pump Control Circuit >> Inspection Procedure >> Hand-held tester:

Hand-held tester:

  1. PERFORM ACTIVE TEST USING HAND-HELD TESTER (OPERATION OF CIRCUIT OPENING RELAY) 
    1. Connect a hand-held tester to the DLC3.
    2. Turn the ignition switch to ON and turn the tester ON.
    3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP/ SPD.
    4. Check whether operating sounds can be heard while operating the relay using the tester.

      OK : Operating sounds can be heard from relay. 

    1. OK : Go to step   7 
    2. NG : GO TO NEXT STEP 
  2. INSPECT  ECM POWER SOURCE CIRCUIT  
    1. NG : REPAIR OR REPLACE POWER SOURCE CIRCUIT 
    2. OK : GO TO NEXT STEP 
  3. INSPECT CIRCUIT OPENING RELAY 
    1. Remove the circuit opening relay from the instrument panel J/B.
    2. Check the circuit opening relay resistance.

      Standard: 

      CIRCUIT OPENING RELAY RESISTANCE SPECIFICATIONS

      Tester Connections Specified Conditions
      3 - 5 10 kΩ or higher
      3 - 5 Below 1 Ω
      (when battery voltage applied to terminals 1 and 2)
    3. Reinstall the circuit opening relay.
      Fig 1: Inspecting Circuit Opening Relay
      G03196347Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPLACE CIRCUIT OPENING RELAY 
    2. OK : GO TO NEXT STEP 
  4. INSPECT ECM (FC VOLTAGE) 
    1. Turn the ignition switch to ON.
    2. Measure the voltage between the terminals of the E3 and E6 ECM connectors.

    Standard: 

    E3 AND E6 ECM CONNECTORS VOLTAGE SPECIFICATIONS

    Tester Connections Specified Conditions
    FC (E6-10) - E01 (E3-7) Between 9 V and 14 V
    Fig 2: Measuring Voltage Between Terminals Of E3 & E6 ECM Connectors
    G03196348Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK : REPLACE ECM (See  REPLACEMENT  ) 
    2. NG : GO TO NEXT STEP 
  5. CHECK HARNESS AND CONNECTOR (EFI RELAY - CIRCUIT OPENING RELAY) 
    1. Remove the EFI relay from the engine room R/B.
    2. Remove the circuit opening relay from the instrument panel J/B.
    3. Check the resistance.

      Standard (Check for Open): 

      RESISTANCE SPECIFICATIONS FOR OPEN

      Tester Connections Specified Conditions
      EFI relay (3) - Circuit opening relay (1) Below 1 Ω
      EFI relay (3) - Circuit opening relay (5) Below 1 Ω

      Standard (Check for short): 

      RESISTANCE SPECIFICATIONS FOR SHORT

      Tester Connections Specified Conditions
      EFI relay (3) or Circuit opening relay (1) - Body ground 10 kΩ or higher
      EFI relay (3) or Circuit opening relay (5) - Body ground 10 kΩ or higher
      Fig 3: Removing EFI Relay From Engine Room R/B
      G03196349Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reinstall the EFI relay.
    5. Reinstall the circuit opening relay.
      Fig 4: Removing Circuit Opening Relay From Instrument Panel J/B
      G03196350Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK : GO TO NEXT STEP 
  6. CHECK HARNESS AND CONNECTOR (ECM - CIRCUIT OPENING RELAY) 
    1. Disconnect the E6 ECM connector.
    2. Remove the circuit opening relay from the instrument panel J/B.
    3. Check the resistance.

      Standard (Check for open): 

      RESISTANCE SPECIFICATIONS FOR OPEN

      Tester Connections Specified Conditions
      FC (E6-10) -
      1. Instrument panel J/B (Circuit opening relay terminal 2)
      		 Below 1 Ω

      Standard (Check for short): 

      RESISTANCE SPECIFICATIONS FOR SHORT

      Tester Connections Specified Conditions
      FC (E6-10) or
      1. Instrument panel J/B (Circuit opening relay terminal 2) - Body ground
      		 10 kΩ or higher
      Fig 5: Disconnecting E6 ECM Connector
      G03196351Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reconnect the ECM connector.
    5. Reinstall the circuit opening relay.
      Fig 6: Removing Circuit Opening Relay From Instrument Panel J/B
      G03196352Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK : REPLACE ECM (See  REPLACEMENT  ) 
  7. INSPECT FUEL PUMP (See  INSPECTION  ) 
    1. NG : REPLACE FUEL PUMP (See  REMOVAL & INSTALLATION AND DISASSEMBLY & REASSEMBLY  ) 
    2. OK : GO TO NEXT STEP 
  8. CHECK HARNESS AND CONNECTOR (CIRCUIT OPENING RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND) 
    1. Remove the circuit opening relay from the instrument panel J/B.
    2. Disconnect the F15 fuel pump connector.
    3. Check the resistance.

      Standard (Check for open): 

      RESISTANCE SPECIFICATIONS FOR OPEN

      Tester Connections Specified Conditions
      Instrument panel J/B (Circuit opening relay terminal 3) - Fuel pump (F15-4) Below 1 Ω
      Fuel pump (F15-5) - Body ground Below 1 Ω

      Standard (Check for short): 

      RESISTANCE SPECIFICATIONS FOR SHORT

      Tester Connections Specified Conditions
      Instrument panel J/B (Circuit opening relay terminal 3) or Fuel pump (F15-4) - Body ground 10 kΩ or higher
      Fig 7: Removing Circuit Opening Relay From Instrument Panel J/B
      G03196353Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reconnect the fuel pump connector.
    5. Reinstall the circuit opening relay.
      Fig 8: Disconnecting F15 Fuel Pump Connector
      G03196354Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK : REPLACE ECM (See  REPLACEMENT  ) 
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