Fuel Pump Control Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
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 on the Techstream.
   RESULT
   
   

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

B → See step   7 

A: Go to next step 

1. Remove the No. 1 integration relay from the engine room relay block and junction block assembly.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1E-1 - A22-21 (FC)	Always	Below 1 Ω
   1E-1 or A22-21 (FC) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the No. 1 integration relay from the engine room relay block and junction block assembly.
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
   1C-6 - P7-4 (B)	Always	Below 1 Ω
   1C-6 or P7-4 (B) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

   Tester Connection	Condition	Specified Condition
   P7-5 (E) - 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 [06/2012 - ] .

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel pump. Refer to INITIALIZATION [06/2012 - ] .

NG → See step   10 

OK: Go to next step 

1. Remove the No. 1 integration relay from the engine room relay block and junction block assembly.
   Fig 1: Identifying No. 1 Integration Relay Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   1D-1 - Body ground	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to No. 1 Integration Relay)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - NO. 1 INTEGRATION RELAY) 

OK → See step   9 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Put the engine in inspection mode (maintenance mode). Refer to INSPECTION MODE PROCEDURE [06/2012 - ] .
5. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Starter Signal.
6. Check the result when the power switch on (IG) and the engine starts.
   OK
   
   

   Condition	Starter Signal
   Power switch on (IG)	Close (OFF)
   Engine started	Open (ON)

NG → See step   12 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Put the engine in inspection mode (maintenance mode). Refer to INSPECTION MODE PROCEDURE [06/2012 - ] .
5. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Engine Speed.
6. Read the values displayed on the Techstream while cranking.

   OK

   Values are displayed continuously.

NG → See step   13 

OK → See step   11