Inspection Procedure

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. 

   OK: Go to step   1 

2. INSPECT  ECM POWER SOURCE CIRCUIT  ) 

   NG: REPAIR OR REPLACE POWER SOURCE CIRCUIT 

   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: 

      TESTER CONNECTIONS SPECIFIED CONDITION (1 OF 2)
      
      

      Tester Connections	Specified Conditions
      3-5	10 kΩ or higher
      3-5	Below 1Ω (when battery voltage applied to terminals 1 and 2)

   3. Reinstall the circuit opening relay.
   Fig 1: Inspecting Circuit Opening Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE CIRCUIT OPENING RELAY 

   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 E4 and E6 ECM connectors.

   Standard: 

   TESTER CONNECTIONS SPECIFIED CONDITION (2 OF 2)
   
   

   Tester Connections	Specified Conditions
   FC (E6-10) - E1 (E4-7)	Between 9V and 14V

   Fig 2: Measuring Voltage Between Terminals Of E4 And E6 ECM Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE ECM (See  REPLACEMENT  ) 

   NG: Go to next step. 

5. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH - CIRCUIT OPENING RELAY) 
   1. Disconnect the I11 ignition switch connector.
   2. Remove the circuit opening relay from the instrument panel J/B.
   3. Check the resistance.
      Fig 3: Disconnecting I11 Ignition Switch Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for open): 

      TESTER CONNECTIONS SPECIFIED CONDITION (FOR OPEN)
      
      

      Tester Connections	Specified Conditions
      IG2 (I11-6) - Instrument panel J/B (Circuit opening relay terminal 1)	Below 1Ω

      Standard (Check for short): 

      TESTER CONNECTIONS SPECIFIED CONDITION (FOR SHORT)
      
      

      Tester Connections	Specified Conditions
      IG2 (I11-6) or Instrument panel J/B (Circuit opening relay terminal 1) - Body ground	10 kΩ or higher

   4. Reinstall the circuit opening relay.
   5. Reconnect the ignition switch connector.
   Fig 4: Removing Circuit Opening Relay From Instrument Panel J/B

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   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.
      Fig 5: Disconnecting E6 ECM Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for open): 

      TESTER CONNECTIONS SPECIFIED CONDITION (FOR OPEN)
      
      

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

      Standard (Check for short): 

      TESTER CONNECTIONS SPECIFIED CONDITION (FOR SHORT)
      
      

      Tester Connections	Specified Conditions
      FC (E6-10) or Instrument panel J/B (Circuit opening relay terminal 2) - Body ground	10 kΩ or higher

   4. Reinstall the circuit opening relay.
   5. Reconnect the ECM connector.
   Fig 6: Removing Circuit Opening Relay From Instrument Panel J/B

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ECM (See  REPLACEMENT  ) 

7. INSPECT FUEL PUMP (See  INSPECTION  ) 

   NG: REPLACE FUEL PUMP (See  REMOVAL & INSTALLATION AND DISASSEMBLY & REASSEMBLY  ) 

   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 F10 fuel pump connector.
   3. Check the resistance.
      Fig 7: Removing Circuit Opening Relay From Instrument Panel J/B

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for open): 

      TESTER CONNECTIONS SPECIFIED CONDITION (FOR OPEN)
      
      

      Tester Connections	Specified Conditions
      Instrument panel J/B (Circuit opening relay terminal 3) - Fuel pump (F10-4)	Below 1Ω
      Fuel pump (F10-5) - Body ground	Below 1Ω

      Standard (Check for short): 

      TESTER CONNECTIONS SPECIFIED CONDITION (FOR SHORT)
      
      

      Tester Connections	Specified Conditions
      Instrument panel J/B (Circuit opening relay terminal 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 8: Disconnecting F10 Fuel Pump Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: CHECK AND REPAIR HARNESS AND CONNECTOR (EFI RELAY - CIRCUIT OPENING RELAY) 

OBD II scan tool (excluding the hand-held tester): 

1. CHECK OPERATION OF FUEL PUMP 
   1. Turn the ignition switch to ON.
   2. Connect terminals FC and E1 of the ECM connector.
   3. Check for fuel pressure in the fuel inlet hose when it is pinched off.

      OK: There is pressure in fuel inlet hose. 

   HINT:

   At this time, operating sounds can be heard from the fuel pump.

   Fig 9: Connecting Terminals FC And E1 Of ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002