Inspection Procedure

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 

   • OK : Go to next step 6 
   • NG : GO TO NEXT STEP 
2. INSPECT  ECM POWER SOURCE CIRCUIT  
   • NG : REPAIR OR REPLACE POWER SOURCE CIRCUIT 
   • OK 
3. INSPECT CIRCUIT OPENING RELAY 
   1. Remove the circuit opening relay from the instrument panel J/B.
   2. Check for continuity in the circuit opening relay.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      1-2	Continuity
      3-5	No continuity
      	Continuity (Apply battery voltage to terminals 1 and 2)

   3. Reinstall the circuit opening relay.
   Fig 1: Checking Continuity In Circuit Opening Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • NG : REPLACE CIRCUIT OPENING RELAY 
   • OK 
4. INSPECT ECM (FC VOLTAGE) 
   1. Turn the ignition switch ON.
   2. Measure the voltage between the terminals of the E3 and E6 ECM connectors.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      FC (E6-10)-E01 (E3-7)	9 to 14 V

      Fig 2: Measuring Voltage Between Terminals Of E3 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 (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 between the wire harness side connectors.

      Standard (Check for open): 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      EFI relay (1) - Circuit opening relay (1)	Below 1 Ω
      EFI relay (3) - Circuit opening relay (5)

      Fig 3: Removing EFI Relay From Engine Room R/B

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      EFI relay (1) or Circuit opening relay (1) - Body ground	10 kΩ or higher
      EFI relay (3) or Circuit opening relay (5) - Body ground

   4. Reinstall the circuit opening relay.
   5. Reinstall the EFI relay.
   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 : REPLACE ECM (See  REPLACEMENT  ) 
6. INSPECT FUEL PUMP (See  INSPECTION  ) 
   • NG : REPAIR OR REPLACE FUEL PUMP (See  REMOVAL & INSTALLATION AND DISASSEMBLY & REASSEMBLY  ) 
   • OK 
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 between the wire harness side connectors.

      Standard (Check for open): 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      Circuit opening relay (3) - Fuel pump (F10-4)	Below 1 Ω
      Fuel pump (F10-5) - Body ground

      Fig 5: Removing Circuit Opening Relay From Instrument Panel J/B

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      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 F10 Fuel Pump Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   • NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 
   • OK : REPLACE ECM (See  REPLACEMENT  ) 

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

1. CHECK OPERATION OF FUEL PUMP 
   1. Turn the ignition switch ON.
   2. Connect between terminals FC and E01 of the ECM connector.
   3. Check for fuel pressure in the fuel inlet hose when it is pinched off.

      Result: There is pressure in fuel inlet hose. 

   HINT:

   At this time, you will hear the fuel flowing sound.

   Fig 7: Checking Operation Of Fuel Pump

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002