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

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 pump operating sounds.
  Result: Operating sounds can be heard from the fuel pump.
  
  Fig 1: Connecting Between Terminals FC And E01 Of ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
2. NG: Go to next step.
INSPECT ECM POWER SOURCE CIRCUIT (See ECM POWER SOURCE CIRCUIT )
1. NG: REPAIR OR REPLACE ECM 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 2: Connector Continuity Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reinstall the circuit opening relay.
  
  Fig 3: Check 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 4: 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 5: Connector (Open) Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 6: Locating EFI Relay Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard (Check for short):
  
  Fig 7: Connector (Short) Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reinstall the circuit opening relay.
5. Reinstall the EFI relay.
  
  Fig 8: Locating Circuit Opening Relay Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS AND 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 9: Connector (Open) Specified Condition Table

Fig 10: 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 11: Identifying Fuel Pump Connector Wire Harness Side
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002