Inspection Procedure

1. Connect Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the tester on.
3. Select the following menu items: Powertrain/Engine/Active Test/Control the Fuel Pump/Speed.
4. Check whether the fuel pump operation sound occurs when performing the Active Test on the tester.

   OK: 

   Fuel pump operating sound occurs. 

   NG: Go to step 2 

   OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 

NG: REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT 

OK: Go to next step 

1. Remove the engine room junction block from the engine room R/B.
2. Measure the C/OPN relay resistance.

   Standard resistance 

   RESISTANCE SPECIFIED CONDITIONS
   
   

   Tester Connection	Specified Condition
   1D-5 - 1D-3	10 kΩ or higher
   	Below 1 Ω (Battery voltage applied between terminals 1G-5 and 1H-9)

3. Reinstall the engine room junction block.

   NG: REPLACE ENGINE ROOM JUNCTION BLOCK 

   Fig 1: Identifying Engine Room Junction Block Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

1. Disconnect the ECM connectors.
2. Measure the voltage between the terminals of the ECM connectors.

   Standard voltage 

   VOLTAGE SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   A55-7 (FC) - B50-81 (E1)	9 to 14 V

3. Reconnect the ECM connectors.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - BATTERY) 

   Fig 2: Identifying B50 And A55 ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: Go to next step 

NG: REPLACE FUEL PUMP  (See REMOVAL )

OK: Go to next step 

1. Check the harness and the connectors between the engine room relay block and the fuel pump.
   1. Disconnect the integration relay connector.
   2. Disconnect the fuel pump connector.
   3. Measure the resistance.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFIED CONDITIONS
      
      

      Tester Connections	Specified Conditions
      1D-3 - K7-4 (Fuel pump)	Below 1 Ω

      Standard resistance (Check for short) 

      RESISTANCE SPECIFIED CONDITIONS
      
      

      Tester Connections	Specified Conditions
      1D-3 or K7-4 (Fuel pump) - Body ground	10 kΩ or higher

2. Check the harness and the connectors between the fuel pump and body ground.
   1. Disconnect the fuel pump connector.
   2. Measure the resistance.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFIED CONDITIONS
      
      

      Tester Connection	Specified Condition
      K7-5 (Fuel pump) - Body ground	Below 1 Ω

3. Reconnect the integration relay connector.
4. Reconnect the fuel pump connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   Fig 3: Identifying Engine Room Junction Block And Fuel Pump Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE ECM (See  REMOVAL   )