Inspection Procedure

1. Check if there is pressure in the fuel inlet hose.

HINT:

If there is fuel pressure, you will hear the sound of fuel flowing.

OK: GO TO step   10

NG: GO TO Next Step 

1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
2. Turn the ignition switch ON and turn the intelligent tester ON.
3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD.
4. Check the relay operation when it is operated by the intelligent tester.

Standard: Operating sound can be heard from the relay. 

OK: GO TO step   5

NG: GO TO Next Step 

1. Remove the circuit opening relay from the engine room relay block.
2. Measure the resistance of the circuit opening relay.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   3 - 5	10 kΩ or higher
   3 - 5	Below 1 Ω (when battery voltage is 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 

1. Turn the ignition switch ON.
2. Measure the voltage of the E7 and E9 ECM connectors.

Standard voltage 

OK: REPLACE ECM 

Fig 2: Identifying E7 And E9 ECM Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: CHECK AND REPAIR HARNESS OR CONNECTOR (ECM - CIRCUIT OPENING RELAY, CIRCUIT OPENING RELAY - IGNITION SWITCH) 

1. Check ECM Power Source Circuit (see ECM POWER SOURCE CIRCUIT ).

NG: REPAIR OR REPLACE 

OK: GO TO Next Step 

1. Remove the fuel pump relay from the engine room relay block.
2. Measure the resistance of the fuel pump relay.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   3 - 4	Below 1 Ω
   3 - 5	10 kΩ or higher
   3 - 4	10 kΩ or higher (when battery voltage is applied to terminals 1 and 2)
   3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

3. Reinstall the fuel pump relay.

NG: REPLACE FUEL PUMP RELAY 

Fig 3: Inspecting Fuel Pump Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO Next Step 

1. Inspect fuel pump resistance.
   1. Disconnect the F12 fuel pump connector.
   2. Measure the resistance of the fuel pump.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      4 - 5	0.2 to 3.0 Ω at 20°C (68°F)

   3. Reconnect the fuel pump connector.
2. Inspect fuel pump operation.
   1. Apply battery voltage to F12-4 (+) and F12-5 (-) terminals. Check that the pump operates.
   Fig 4: Inspecting Fuel Pump

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   • These tests must be done quickly (within 10 seconds) to prevent the coil from burning out.
   • Keep fuel pump as far away from the battery as possible.
   • Always do the switching at the battery side.

   NG: REPLACE FUEL PUMP 

   OK: GO TO Next Step 

1. Check harness and connector (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO Next Step 

1. Check harness and connector (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

1. Remove the fuel pump relay from the engine room relay block.
2. Measure the resistance of the fuel pump relay.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   3 - 4	Below 1 Ω
   3 - 5	10 kΩ or higher
   3 - 4	10 kΩ or higher (when battery voltage is applied to terminals 1 and 2)
   3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

3. Reinstall the fuel pump relay.(F

NG: REPLACE FUEL PUMP RELAY 

Fig 5: Inspecting Fuel Pump Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO Next Step 

1. Inspect the fuel pump resistor resistance.
   1. Measure the resistance of the terminals.

      Resistance: 0.94 to 1.0 Ω at 20°C(68°F) 

   NG: REPLACE FUEL PUMP RESISTOR 

   Fig 6: Inspecting Fuel Pump Resistor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: GO TO Next Step 

1. Check harness and connector (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

   OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON  PROBLEM SYMPTOMS TABLE  

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR