Fuel Pump Control Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
5. Check whether the fuel pump operating sound occurs when performing the Active Test using the Techstream.

   Result

   Result	Proceed to
   Fuel pump operating sound does not occur	A
   Fuel pump operating sound occurs	B

B → See step   8 

A: Go to next step 

1. Disconnect the driver side junction block connector.
   Fig 1: Inspecting Driver Side Junction Block

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage between the terminal of the driver side junction block and the body ground when the ignition switch is turned to ON and off.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   2B-11 - Body ground	Ignition switch off	Below 1 V
   2F-4 - Body ground
   2B-11 - Body ground	Ignition switch ON	11 to 14 V
   2F-4 - Body ground

   Result

   Result	Proceed to
   Outside standard range	A
   Within standard range	B

3. Reconnect the driver side junction block connector.

B → See step   4 

A: Go to next step 

1. Remove the integration relay from the engine room relay block.
2. Disconnect the integration relay connectors.
3. Disconnect the driver side junction block connectors.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   1A-4 - 2F-4	Always	Below 1 Ω
   1B-4 - 2B-11	Always	Below 1 Ω

5. Reconnect the integration relay connectors.
6. Reinstall the integration relay.
7. Reconnect the driver side junction block connectors.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVER SIDE JUNCTION BLOCK - INTEGRATION RELAY) 

OK → See step   10 

1. Inspect the C/OPN relay. Refer to ON-VEHICLE INSPECTION .

NG → REPLACE DRIVER SIDE JUNCTION BLOCK 

OK: Go to next step 

1. Disconnect the ECM connector.
2. Disconnect the driver side junction block connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   2B-10 - A37-7 (FC)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   2B-10 or A37-7 (FC) - Body ground	Always	10 kΩ or higher

4. Reconnect the driver side junction block connector.
5. Reconnect the ECM connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (C/OPN RELAY - ECM) 

OK: Go to next step 

1. Disconnect the driver side junction block connector.
2. Disconnect the fuel pump connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connections	Condition	Specified Conditions
   2A-8 - L13-4 (B) (Fuel pump)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connections	Condition	Specified Conditions
   2A-8 or L13-4 (B) (Fuel pump) - Body ground	Always	10 kΩ or higher

4. Reconnect the fuel pump connector.
5. Reconnect the driver side junction block connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVER SIDE JUNCTION BLOCK - FUEL PUMP) 

OK: Go to next step 

1. Disconnect the fuel pump connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connections	Condition	Specified Conditions
   L13-5 (E) (Fuel pump) - Body ground	Always	Below 1 Ω

3. Reconnect the fuel pump connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PUMP - BODY GROUND) 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Starter Signal.
5. Check the result when the ignition switch is turned to ON and engine is started.

   OK

   Condition	Starter Signal
   Ignition switch ON	OFF (Starter signal off)
   Engine started	ON (Starter signal on)

NG → See step   12 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Engine Speed.
5. Read the values displayed on the Techstream while cranking.

   OK

   Values are displayed continuously.

NG → See step   13 

OK → See step   11