Inspection Procedure

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   12 

NG: Go to Next Step 

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn Techstream on.
3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.
4. Check the operation of the relay while operating it using Techstream.

OK: Operating noise can be heard from the relay. 

OK: Go to step   8 

NG: Go to Next Step 

NG: REPAIR OR REPLACE POWER SOURCE CIRCUIT 

OK: Go to Next Step 

1. Remove the F/PMP fuse from the engine room J/B No. 2.
2. Measure the resistance of the F/PMP fuse.
Fig 1: Identifying F/PMP Fuse From Engine Room J/B No. 2
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance: 

Below 1 Ω 

NG: REPLACE FUSE 

OK: Go to Next Step 

1. Remove the integration relay from the engine room J/B No. 2.
2. Measure the resistance according to the value (s) in the table below.

Standard resistance 

Fig 2: Identifying Integration Relay From Engine Room J/B No. 2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE INTEGRATION RELAY 

OK: Go to Next Step 

1. Remove the integration relay from the engine room J/B No. 2.
2. Measure the resistance according to the value (s) in the table below.

Standard resistance 

Fig 3: Identifying Integration Relay From Engine Room J/B No. 2 (C/OPN Relay)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE INTEGRATION RELAY 

OK: Go to Next Step 

1. Turn the engine switch on (IG).
2. Measure the voltage according to the value (s) in the table below.

Standard voltage 

Fig 4: Identifying ECM Connector A5 And E4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE ECM 

NG: CHECK AND REPAIR HARNESS AND CONNECTOR (ECM - CIRCUIT OPENING RELAY) 

1. Remove the F/PMP relay from the engine room R/B No. 2.
2. Measure the resistance according to the value (s) in the table below.

Standard resistance 

Fig 5: Inspecting F/PMP Relay Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE F/PMP RELAY 

OK: Go to Next Step 

1. Inspect 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) 

2. Inspect 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 switch at the battery side.
   Fig 6: Identifying Fuel Pump Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE FUEL PUMP 

OK: Go to Next Step 

1. Check the harness and the connectors between the fuel pump and the F/PMP relay.
   1. Disconnect the fuel pump connector.
   2. Remove the F/PMP relay from the engine room R/B No. 2.
   3. Measure the resistance according to the value (s) in the table below.

   Standard resistance (Check for open) 

   RESISTANCE SPECIFICATION CHART
   
   

   Tester Connection	Specified Condition
   Fuel pump (Q14-4) - F/PMP relay (4)	Below 1 Ω

   Standard resistance (Check for short) 

   RESISTANCE SPECIFICATION CHART
   
   

   Tester Connection	Specified Condition
   Fuel pump (Q14-4) or F/PMP (4) - Body ground	10 kΩ or higher

2. Check the harness and the connectors between the fuel pump and body ground.
   1. Disconnect the fuel pump connector.
   2. Measure the resistance according to the value (s) in the table below.

Standard resistance (Check for open) 

Fig 7: Identifying Q14 Fuel Pump Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

1. Remove the integration relay from the engine room R/B No. 2.
2. Remove the F/PMP relay from the engine room R/B No. 2.
3. Measure the resistance according to the value (s) in the table below.

Standard resistance (Check for open) 

Standard resistance (Check for short) 

Fig 8: Identifying F/PMP Relay From Engine Room R/B No. 2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPAIR OR REPLACE INTEGRATION RELAY 

1. Remove the F/PMP relay from the engine room R/B No. 2.
2. Measure the resistance according to the value (s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION CHART
   
   

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

Fig 9: Inspecting F/PMP Relay Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE F/PMP RELAY 

OK: Go to Next Step 

1. Measure the resistance of the fuel pump resistor.
Fig 10: Measuring Resistance Of Fuel Pump Resistor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance: 

0.30 to 0.34 Ω at 20°C (68°F) 

NG: REPLACE FUEL PUMP RESISTER 

OK: Go to Next Step 

1. Check the harness and the connectors between the F/ PMP relay and the fuel pump resistor.
   1. Remove the F/PMP relay from the engine room R/B No. 2.
   2. Disconnect the fuel pump resistor connector.
   3. Measure the resistance according to the value (s) in the table below.

   Standard resistance (Check for open) 

   RESISTANCE SPECIFICATION CHART
   
   

   Tester Connection	Specified Condition
   F/PMP relay (4) - Fuel pump resistor (A40-2)	Below 1 Ω
   F/PMP relay (3) - Fuel pump resistor (A40-1)	Below 1 Ω

   Standard resistance (Check for short) 

   RESISTANCE SPECIFICATION CHART
   
   

   Tester Connection	Specified Condition
   Fuel pump relay (4) or Fuel pump resistor (A40-2) - Body ground	10 kΩ or higher
   Fuel pump relay (3) or Fuel pump resistor (A40-1) - Body ground	10 kΩ or higher

Fig 11: Identifying Fuel Pump Resistor Connector A40
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR