Hand-held tester:

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 if operation sounds can be heard while operating the relay with the hand-held tester.
  Standard: Operating sounds can be heard from the relay.
1. OK: Go to step 6 .
2. NG: Go to next step.
INSPECT ECM POWER SOURCE CIRCUIT (See ECM POWER SOURCE CIRCUIT )
1. NG: REPAIR OR REPLACE POWER SOURCE CIRCUIT
2. OK: Go to next step.
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:
  
  Fig 1: Connector Continuity Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reinstall the circuit opening relay.
  
  Fig 2: Checking For Continuity In Circuit Opening Relay
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE CIRCUIT OPENING RELAY
2. OK: Go to next step.

INSPECT ECM (FC VOLTAGE)

Measure the voltage between the terminals of the E3 and E6 ECM connectors.

Standard:

CONNECTOR SPECIFIED CONDITION

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

Fig 3: Measuring Voltage Between Terminal Of E3 And E6 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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):
  
  Fig 4: Connector (Open) Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 5: Locating EFI Relay Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard (Check for short):
  
  Fig 6: Connector (Short) Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reinstall the circuit opening relay.
5. Reinstall the EFI relay.
  
  Fig 7: Locating Circuit Opening Relay Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: REPLACE ECM (See REPLACEMENT )
INSPECT FUEL PUMP (See INSPECTION )
1. NG: REPLACE FUEL PUMP (See REMOVAL & INSTALLATION AND DISASSEMBLY & REASSEMBLY )
2. OK: Go to next step.

CHECK HARNESS AND CONNECTOR (CIRCUIT OPENING RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND)

Check the resistance between the wire harness side connectors.

Standard (Check for open):

Fig 8: Connector Specified Condition Table

Fig 9: Locating Circuit Opening Relay Connector

Standard (Check for short):

CONNECTOR (SHORT) SPECIFIED CONDITION

Tester Connection	Specified Condition
Circuit opening relay (3) or Fuel pump (F10-4) - Body ground	10 kΩ or higher

Reconnect the fuel pump connector.
Reinstall the circuit opening relay.

Fig 10: Identifying Fuel Pump Connector Wire Harness Side
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002