Inspection Procedure

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE CIRCUIT OPENING RELAY)
1. Connect the intelligent tester to the DLC3.
2. Turn the power switch ON (IG).
3. Turn the tester ON.
4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD.
5. Check the relay operation while operating it with the tester.
  OK : Operating noise can be heard from the relay.
OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEMS TABLE

NG : GO TO NEXT STEP
INSPECT POWER SOURCE CIRCUIT
NG : REPAIR OR REPLACE POWER SOURCE CIRCUIT COMPONENTS

OK : GO TO NEXT STEP

INSPECT INTEGRATION RELAY (C/OPN RELAY)

Remove the integration relay from the engine room relay block.

Inspect the circuit opening relay.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

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)

Reinstall the integration relay.

NG : REPLACE INTEGRATION RELAY

Fig 1: Inspecting Integration Relay (C/OPN Relay)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP

CHECK ECM (FC VOLTAGE)

Turn the power switch ON (IG).

Measure the voltage between the specified terminals of the E5 and E6 ECM connectors.

Standard voltage

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
E6-10 (FC) - E5-28 (E1)	9 to 14 V

GO : Go to step 5

Fig 2: Identifying E5 And E6 ECM Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : CHECK AND REPAIR HARNESS AND CONNECTOR

INSPECT FUEL PUMP

Disconnect the F14 fuel pump connector.

Inspect the fuel pump resistance.

Measure the resistance between terminals 3 and 7.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

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

Inspect the fuel pump operation.
1. Apply battery voltage to the fuel pump terminals. Check that the pump operates.
  
  Fig 3: Identifying F14 fuel pump connector
  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.
Reconnect the fuel pump connector.

NG : REPAIR OR REPLACE FUEL TANK ASSEMBLY

OK : GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (C/OPN RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND)

Check the harness and the connectors between the circuit opening relay and the fuel pump connector.

Remove the integration relay from the engine room relay block.
Disconnect the F14 fuel pump connector.

Measure the resistance between the wire harness side connectors.

Standard resistance (Check for open)

TESTER CONNECTION AND SPECIFIED CONDITION

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

Standard resistance (Check for short)

Fig 4: Identifying Engine Room Relay Block Location

TESTER CONNECTION AND SPECIFIED CONDITION

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

Reinstall the integration relay.
Reconnect the fuel pump connector.

Check the harness and the connectors between the fuel pump connector and the body ground.

Disconnect the F14 fuel pump connector.

Measure the resistance between the wire harness side connector and the body ground.

Standard resistance (Check for open)

TESTER CONNECTION AND SPECIFIED CONDITION

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

Reconnect the fuel pump connector.

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 5: Identifying F14 Fuel Pump Connector Terminal

OK : REPLACE ECM