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Hand-held tester:

  1. PERFORM ACTIVE TEST BY HAND-HELD TESTER (OPERATION OF CIRCUIT OPENING RELAY) 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch ON and push the hand-held tester main switch ON.
    3. Select the item "DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD".
    4. Check the relay operation while operating it with the hand-held tester.

      Standard: Operating noise can be heard from the relay. 

    1. OK : Go to step   7 . 
    2. NG : Go to next step. 
  2. CHECK 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. Inspect the circuit opening relay.
      Fig 1: Inspecting Circuit Opening Relay
      G03367228Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      STANDARD

      Tester Connection Specified Condition
      1 - 2 Continuity
      3 - 5 No Continuity
      Continuity (Apply Battery Voltage To Terminals 1 & 2)
    3. Reinstall the circuit opening relay.
    1. NG : REPLACE CIRCUIT OPENING RELAY 
    2. OK : Go to next step. 
  4. INSPECT ECM (CHECK VOLTAGE) 
    Fig 2: Inspecting ECM (Check Voltage)
    G03367229Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the ignition switch ON.
    2. Measure the voltage between the specified terminals of the E3 and E6 ECM connectors.

      Standard: 

      STANDARD

      Tester Connection Specified Condition
      FC (E6-10) - E01 (E3-7) 9 to 14 V
    1. OK : REPLACE ECM 
    2. NG : Go to next step. 
  5. CHECK HARNESS AND CONNECTOR (EFI RELAY - CIRCUIT OPENING RELAY) 
    Fig 3: Checking Harness (EFI Relay - Circuit Opening Relay)
    G03367230Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the EFI relay from the engine room R/B.
    2. Remove the circuit opening relay from the instrument panel J/B.
    3. Measure the resistance between the wire harness side connectors.

      Standard (Check for open): 

      STANDARD (CHECK FOR OPEN)

      Tester Connection Specified Condition
      EFI Relay (3) - Circuit Opening Relay (1) Below 1 Ω
      EFI Relay (3) - Circuit Opening Relay (5)

      Standard (Check for short): 

      STANDARD (CHECK FOR SHORT)

      Tester Connection Specified Condition
      EFI Relay (3) Or Circuit Opening Relay (1) - Body Ground 10 kΩ Or Higher
      EFI Relay (3) Or Circuit Opening Relay (5) - Body Ground
    4. Reinstall the EFI relay.
    5. Reinstall the circuit opening relay.
      Fig 4: Checking Connector (Efi Relay - Circuit Opening Relay)
      G03367231Courtesy 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) 
    Fig 5: Checking Harness (ECM - Circuit Opening Relay)
    G03367232Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E6 ECM connector.
    2. Remove the circuit opening relay from the instrument panel J/B.
    3. Measure the resistance between the wire harness side connectors.

      Standard (Check for open): 

      STANDARD (CHECK FOR OPEN)

      Tester Connection Specified Condition
      FC (E6-10) - Circuit Opening Relay (2) Below 1 Ω

      Standard (Check for short): 

      STANDARD (CHECK FOR SHORT)

      Tester Connection Specified Condition
      FC (E6-10) - Circuit Opening Relay (2) - Body Ground 10 kΩ Or Higher
    4. Reconnect the ECM connector.
    5. Reinstall the circuit opening relay.
      Fig 6: Checking Connector (ECM - Circuit Opening Relay)
      G03367233Courtesy 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 
    2. OK : Go to next step. 
  8. CHECK HARNESS AND CONNECTOR (CIRCUIT OPENING RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND) 
    Fig 7: Checking Harness (Circuit Opening Relay - Fuel Pump, Fuel Pump - Body Ground)
    G03367234Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the circuit opening relay from the instrument panel J/B.
    2. Disconnect the F15 fuel pump connector.
    3. Measure the resistance between the wire harness side connectors.

      Standard (Check for open): 

      STANDARD (CHECK FOR OPEN)

      Tester Connection Specified Condition
      Circuit Opening Relay (3) - Fuel Pump (F15-4) Continuity
      Fuel Pump (F15-5) - Body Ground

      Standard (Check for short): 

      STANDARD (CHECK FOR SHORT)

      Tester Connection Specified Condition
      Circuit Opening Relay (3) Or Fuel Pump (F15-4) - Body Ground 10 kΩ Or Higher
    4. Reconnect the fuel pump connector.
    5. Reinstall the circuit opening relay.
      Fig 8: Checking Connector (Circuit Opening Relay - Fuel Pump, Fuel Pump - Body Ground)
      G03367235Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK : REPLACE ECM (See  REPLACEMENT  ) 
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