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Home >> Toyota >> 2006 >> Corolla CE, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Control System (SFI) (2ZZ-GE) - Diagnostics) >> Fuel Pump Control Circuit >> Inspection Procedure >> Hand-held tester:

Hand-held tester:

WARNING: This page is about a different variant/trim than selected.
  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   6 
    2. NG: GO TO NEXT STEP 
  2. INSPECT ECM POWER SOURCE CIRCUIT (See  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

      Tester Connections Specified Conditions
      3 - 5 10 kΩ or higher
      3 - 5 Below 1 Ω (when battery voltage applied to terminals 1 and 2)
      Fig 1: Inspecting Circuit Opening Relay
      G02599520Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Reinstall the circuit opening relay.
    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 E5 ECM connectors.

      Standard: 

      ECM (FC VOLTAGE)

      Tester Connections Specified Conditions
      FC (E5-16) - E01 (E3-7) Between 9 V and 14 V
      Fig 2: Inspecting ECM (FC Voltage)
      G02599521Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: REPLACE ECM (See  ECM (1ZZ-FE/2ZZ-GE) 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): 

      EFI RELAY - CIRCUIT OPENING RELAY RESISTANCE (CHECK FOR OPEN)

      Tester Connections Specified Conditions
      EFI relay (1) - Circuit opening relay (1) Below 1 Ω
      EFI relay (3) - Circuit opening relay (5) Below 1 Ω
      Fig 3: Removing EFI Relay
      G02599522Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      EFI RELAY - CIRCUIT OPENING RELAY RESISTANCE (CHECK FOR SHORT)

      Tester Connections Specified Conditions
      EFI relay (1) 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
    4. Reinstall the circuit opening relay.
    5. Reinstall the EFI relay.
      Fig 4: Removing Circuit Opening Relay
      G02599523Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 

      REPLACE ECM (See  ECM (1ZZ-FE/2ZZ-GE) REPLACEMENT  ) 

  6. INSPECT FUEL PUMP (See  INSPECTION  ) 
    1. NG: REPLACE FUEL PUMP (See  REMOVAL & INSTALLATION AND DISASSEMBLY & REASSEMBLY  ) 
    2. OK: GO TO NEXT STEP 
  7. 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 F10 fuel pump connector.
    3. Check the resistance.

      Standard (Check for open): 

      CIRCUIT OPENING RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND RESISTANCE (CHECK FOR OPEN)

      Tester Connections Specified Conditions
      Circuit opening relay (3) - Fuel pump (F10-4) Below 1 Ω
      Fuel pump (F10-5) - Body ground Below 1 Ω
      Fig 5: Removing Circuit Opening Relay
      G02599524Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      CIRCUIT OPENING RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND RESISTANCE (CHECK FOR SHORT)

      Tester Connections Specified Conditions
      Circuit opening relay (3) or Fuel pump (F10-4) - Body ground 10 kΩ or higher
    4. Reconnect the fuel pump connector.
    5. Reinstall the circuit opening relay.
      Fig 6: Identifying Terminals Of F10 Fuel Pump Connector
      G02599525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO NEXT STEP 

      REPLACE ECM (See  ECM (1ZZ-FE/2ZZ-GE) REPLACEMENT  ) 

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