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HOMESERVICE MANUALSTOYOTA2009FJ CRUISER RWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM - SYSTEM AND CIRCUIT TESTING, ON-VEHICLE INSPECTION, REMOVAL, INSPECTION & INSTALLATIONFUEL PUMP CONTROL CIRCUITINSPECTION PROCEDURE

2009 Toyota FJ Cruiser RWD

Inspection Procedure

2009 Toyota FJ Cruiser RWDSECTION Inspection Procedure

CHECK FUEL PUMP OPERATION
1. Check if there is pressure in the fuel inlet hose.
  HINT:
  
  If there is fuel pressure, you will hear the sound of fuel flowing.
OK: Go to step 10

NG: Go to next step
PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CIRCUIT OPENING RELAY)
1. Connect a Techstream to the DLC3.
2. Turn the ignition switch ON and turn the tester ON.
3. Select the following menu items: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.
4. Check whether operating sounds can be heard while operating the relay using the tester.
  OK: Operating sounds can be heard from relay.
OK: Go to step 5

NG: Go to next step

INSPECT CIRCUIT OPENING RELAY

Remove the circuit opening relay from the engine room relay block.

Fig 1: Identifying A/F Sensor Heater Relay
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
3 - 5	10 kΩ or higher
3 - 5	Below 1 Ω (when battery voltage applied to terminals 1 and 2)

Reinstall the circuit opening relay.

NG: REPLACE CIRCUIT OPENING RELAY

OK: Go to Next Step

INSPECT ECM (FC VOLTAGE)

Turn the ignition switch ON.

Fig 2: Identifying B3 And E47 ECM Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage according to the value(s) in the table below.

Standard Voltage

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
FC (E47-10) - E1 (B3-1)	11 to 14 V

OK: REPLACE ECM (See REMOVAL )

NG: CHECK AND REPLACE HARNESS OR CONNECTOR (ECM - CIRCUIT OPENING RELAY - IGNITION SWITCH)

INSPECT ECM POWER SOURCE CIRCUIT
Inspect the ECM power source circuit (See ECM POWER SOURCE CIRCUIT ).

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

INSPECT FUEL PUMP RELAY ASSEMBLY

Remove the fuel pump relay from the engine room relay block.

Fig 3: Identifying Fuel Pump Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
3 - 4	Below 1 Ω
3 - 5	10 kΩ or higher
3 - 4	10 kΩ or higher (when battery voltage applied to terminals 1 and 2)
3 - 5	Below 1 Ω (when battery voltage applied to terminals 1 and 2)

Reinstall the fuel pump relay.

NG: REPLACE FUEL PUMP RELAY ASSEMBLY

OK: Go to Next Step

INSPECT FUEL PUMP ASSEMBLY
1. Inspect the fuel pump resistance.
  1. Measure the resistance between terminals 4 and 5.
    Standard Resistance: 0.2 to 3.0 Ω. at 20°C (68°F)
    
    Fig 4: Identifying Fuel Pump Connector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the fuel pump operation.
  1. Apply battery voltage to both terminals. Check that the pump operates.
    NOTE:
    These tests must be done quickly (within 10 seconds) to prevent the coil from burning out.
    
    Keep the fuel pump as far away from the battery as possible.
    
    Always do the switching at the battery side.
NG: REPLACE FUEL PUMP ASSEMBLY (See REMOVAL )

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (FUEL PUMP - FUEL PUMP RELAY, FUEL PUMP - Body ground)

Check the harness and connector between the fuel pump and fuel pump relay.

Disconnect the L5 fuel pump connector.
Remove the fuel pump relay from the engine room relay block.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
Fuel pump (L5-4) - Fuel pump relay (4)	Below 1 Ω

Standard Resistance (Check for short)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
Fuel pump (L5-4) or Fuel pump relay (4) - Body ground	10 kΩ or higher

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

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

Disconnect the fuel pump connector.

Fig 5: Identifying Fuel Pump Relay And L5 Fuel Pump Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
Fuel pump (L5-5) - Body ground	Below 1 Ω

Reconnect the fuel pump connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

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

Remove the circuit opening relay from the engine room relay block.

Fig 6: Identifying Circuit Opening Relay And Fuel Pump Relay Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Remove the fuel pump relay from the engine room relay block.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
Circuit opening relay (3) - Fuel pump relay (3)	Below 1 Ω

Standard Resistance (Check for short)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
Circuit opening relay (3) or Fuel pump relay (3) - Body ground	10 kΩ or higher

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

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: CHECK AND REPAIR HARNESS OR CONNECTOR (EFI RELAY - CIRCUIT OPENING RELAY)

INSPECT FUEL PUMP RELAY ASSEMBLY

Remove the fuel pump relay from the engine room relay block.

Fig 7: Identifying Fuel Pump Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
3 - 4	Below 1 Ω
3 - 5	10 kΩ or higher
3 - 4	10 kΩ or higher (when battery voltage applied to terminals 1 and 2)
3 - 5	Below 1 Ω (when battery voltage applied to terminals 1 and 2)

Reinstall the fuel pump relay.

NG: REPLACE FUEL PUMP RELAY ASSEMBLY

OK: Go to Next Step

INSPECT FUEL PUMP RESISTOR (RESISTANCE)
1. Inspect the fuel pump resistor resistance.
  1. Measure the resistance.
    Standard Resistance: 0.941 to 0.999 Ω at 20°C (68°F)
    
    Fig 8: Inspecting Fuel Pump Resistor Resistance
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE FUEL PUMP RESISTOR (See REMOVAL )

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (FUEL PUMP RELAY - FUEL PUMP RESISTOR - FUEL PUMP)

Check the harness and connector between the fuel pump relay and fuel pump resistor.

Remove the fuel pump relay from the engine room relay block.
Disconnect the A13 fuel pump resistor connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
Fuel pump relay (5) - Fuel pump resistor (A13-1)	Below 1 Ω

Standard Resistance (Check for short)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
Fuel pump relay (5) or Fuel pump resistor (A13-1) - Body ground	10 kΩ or higher

Reinstall the fuel pump relay.
Reconnect the fuel pump resistor connector.

Check the harness and connector between the fuel pump resistor and fuel pump.

Disconnect the A13 fuel pump resistor connector.

Fig 9: Identifying A13 Fuel Pump Resistor Connector And L5 Fuel Pump Connector

Disconnect the L5 fuel pump connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
Fuel pump resistor (A13-2) - Fuel pump (L5-4)	Below 1 Ω

Standard Resistance (Check for short)

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connections	Specified Conditions
Fuel pump resistor (A13-2) or Fuel pump (L5-4) - Body ground	10 kΩ or higher

Reconnect the fuel pump resistor connector.
Reconnect the fuel pump connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.