Fuel Pump Control Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch ON and turn the tester ON.
3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.
4. Check the relay operation while operating it using the tester.

   OK

   Operating noise can be heard from the relay.

OK → See step   6 

NG: Go to next step 

Fig 1: Inspecting IGN Fuse

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the IGN fuse from the engine room No. 1 relay block.
2. Measure the resistance of the fuse.

   Standard resistance

   Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

Fig 2: Inspecting Circuit Opening Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the circuit opening relay from the engine room No. 2 relay block.
2. Measure the resistance of the relay.

   Standard resistance

   Below 1 Ω

NG → REPLACE CIRCUIT OPENING RELAY 

OK: Go to next step 

Fig 3: Inspecting IG2 Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the IG2 relay from the engine room No. 1 relay block.
2. Measure the resistance of the relay.

   Standard resistance

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

NG → REPLACE IG2 RELAY 

OK: Go to next step 

Fig 4: Checking ECM (FC Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the ignition switch ON.
2. Measure the voltage of the ECM connector.

   Standard voltage

   Tester Connection	Specified Condition
   E6-14 (FC) - Body ground	11 to 14 V

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK → REPLACE ECM 

Fig 5: Inspecting Fuel Pump Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the fuel pump relay from the engine room No. 2 relay block.
2. Measure the resistance of the relay.

   Standard resistance

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

NG → REPLACE FUEL PUMP RELAY 

OK: Go to next step 

Fig 6: Identifying Fuel Pump Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the resistance of the fuel pump.
   1. Measure the resistance between terminals 4 and 5.

      Standard resistance

      0.2 to 3.0 Ω at 20°C (68°F)

2. Check the operation of the fuel pump.
   1. Apply battery voltage to both the terminals. Check that the pump operates.
   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.
   WARNING:

   Always turn the voltage on and off on the battery side, not the fuel pump.

NG → REPLACE FUEL PUMP 

OK: Go to next step 

Fig 7: Inspecting Fuel Pump Resistor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the resistance of the resistor.

   Standard resistance

   0.30 to 0.34 Ω at 20°C (68°F)

NG → REPLACE FUEL PUMP RESISTOR 

OK: Go to next step 

Fig 8: Checking ECM (FPR Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the ignition switch ON.
2. Measure the voltage of the ECM connector.

   Standard voltage

   Tester Connection	Specified Condition
   E6-15 (FPR) - Body ground	11 to 14 V

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK → REPLACE ECM