Hand-held tester:

1. Connect the hand-held tester to the DLC3.
2. Turn the power switch ON (IG).
3. Turn the hand-held tester ON.
4. Select the item: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP/SPD.
5. Check the relay operation while operating it using the hand-held tester.

Standard: Operating noise can be heard from the relay. 

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

NG: Go To Next Step 

NG: REPAIR OR REPLACE POWER SOURCE CIRCUIT COMPONENTS 

OK: Go To Next Step 

Fig 1: Locating Integration Relay (C/OPN Relay) Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the integration relay from the engine room R/B.
2. Inspect the circuit opening relay.

   Standard: 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   (3G-5) - (3G-8)	10 kΩ or higher
   (3G-5) - (3G-8)	Below 1 Ω (Apply battery voltage to terminals 3G-6 and 3G-7)

3. Reinstall the integration relay.

NG: REPLACE INTEGRATION RELAY 

OK: Go To Next Step 

Fig 2: Locating ECM Connector E5 And E6

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the power switch ON (IG).
2. Measure the voltage between the specified terminals of the E5 and E6 ECM connectors.

Standard: 

OK: Go to step 5 

NG: CHECK AND REPAIR HARNESS OR CONNECTOR 

Fig 3: Locating Fuel Pump Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the F14 fuel pump connector.
2. Inspect the fuel pump resistance.
   1. Measure the resistance between terminals 3 and 7.

   Standard: 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   3 - 7	0.2 to 3.0 +/- at 20 °C (68 °F)

3. Inspect the fuel pump operation
   1. Apply battery voltage to the fuel pump terminals.

   Check that the pump operates.

   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.
4. Reconnect the fuel pump connector.

NG: REPAIR OR REPLACE FUEL TANK ASSY 

OK: Go To Next Step 

Fig 4: Locating Integration Relay In Engine Room R/B

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the harness and the connectors between the circuit opening relay and the fuel pump connector.
   1. Remove the integration relay from the engine room R/B.
   2. Disconnect the F14 fuel pump connector.
   3. Check the resistance between the wire harness side connectors.

      Standard (Check for open): 

      DTC U0293 HARNESS AND CONNECTOR (C/OPN RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND) STANDARD (1 OF 3)
      
      

      Tester Connection	Specified Condition
      Circuit opening relay(3G-8) - Fuel pump (F14-3)	Below 1 Ω

      Fig 5: Locating Fuel Pump Connector Wire Harness Side

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Check for short): 

      DTC U0293 HARNESS AND CONNECTOR (C/OPN RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND) STANDARD (2 OF 3)
      
      

      Tester Connection	Specified Condition
      Circuit opening relay (3G-8) or Fuel pump (F14-3) - Body ground	10 kΩ or higher

   4. Reinstall the integration relay.
   5. Reconnect the fuel pump connector.
2. Check the harness and the connectors between the fuel pump connector and the body ground.
   1. Disconnect the F14 fuel pump connector.
   2. Check the resistance between the wire harness side connector and the body ground.

      Standard (Check for open): 

      DTC U0293 HARNESS AND CONNECTOR (C/OPN RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND) STANDARD (3 OF 3)
      
      

      Tester Connection	Specified Condition
      Fuel pump (F14-7) - Body ground	Below 1 Ω

   3. Reconnect the fuel pump connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ECM (See  ENGINE CONTROL SYSTEM  )