Fuel Pump Control Circuit [01/2014 - ]: Procedure

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

   OK

   Fuel pump operating sound occurs.

NG → See step   4 

OK: Go to next step 

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

   OK

   Ignition Switch Position	Starter Signal
   ON	Close (Starter signal OFF)
   START	Open (Starter signal ON)

NG → REPAIR OR REPLACE STARTING SYSTEM 

OK: Go to next step 

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

   OK

   Values are displayed continuously.

NG → REPAIR OR REPLACE CRANKSHAFT POSITION SENSOR CIRCUIT 

OK → See step   12 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   2B-2 - Body ground	Ignition switch off	Below 1 V
   2B-5 - Body ground
   2B-2 - Body ground	Ignition switch ON	11 to 14 V
   2B-5 - Body ground

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Instrument Panel Junction Block)

NG → See step   9 

OK: Go to next step 

1. Inspect the instrument panel junction block (C/OPN relay). Refer to ON-VEHICLE INSPECTION [05/2013 - ] - Step 4 .

NG → REPLACE INSTRUMENT PANEL JUNCTION BLOCK 

OK: Go to next step 

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2B-12 - A35-8 (FC)	Always	Below 1 Ω
   2B-12 or A35-8 (FC) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Check the harness and connectors between the instrument panel junction block and fuel pump.
   1. Disconnect the instrument panel junction block connector.
   2. Disconnect the fuel pump connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      2A-13 - H12-4	Always	Below 1 Ω
      2A-13 or H12-4 - Body ground	Always	10 kΩ or higher

2. Check the harness and 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

      Tester Connection	Condition	Specified Condition
      H12-5 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Inspect the fuel pump. Refer to INSPECTION [05/2013 - ] .

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel pump. Refer to INITIALIZATION [05/2013 - ] .

NG → See step   14 

OK → See step   13 

1. Inspect the integration relay (EFI NO. 2). Refer to ON-VEHICLE INSPECTION [05/2013 - ] - Step 3 .

NG → REPLACE INTEGRATION RELAY 

OK: Go to next step 

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1A-4 - 2B-5	Always	Below 1 Ω
   2B-2 - 1B-8	Always	Below 1 Ω
   1B-6 - 1B-4	Always	Below 1 Ω
   1B-7 - Body ground	Always	Below 1 Ω
   1A-4 or 2B-5 - Body ground	Always	10 kΩ or higher
   2B-2 or 1B-8 - Body ground	Always	10 kΩ or higher
   1B-6 or 1B-4 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   11