Toyota Tundra (2015 year). Manual — part 1686

B

B

B

13.

(b) Turn the ignition switch to ON.

(c) Check the MIL.

Result

RESULT

PROCEED TO

MIL illuminates

A

MIL does not illuminate

B

A

14.

(b) Turn the ignition switch to ON.

(c) Check the MIL.

Result

RESULT

PROCEED TO

MIL illuminates

A

MIL does not illuminate

B

A

15.

CHECK HARNESS AND CONNECTOR

3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: VC Output C...

(a) Disconnect the D9 throttle body connector.

(b) Disconnect the A14 accelerator pedal position sensor connector.

(c) Disconnect the R12 canister pump module connector.

(d) Disconnect the D58 air switching valve assembly (for Bank 1) connector.

(e) Disconnect the D59 air switching valve assembly (for Bank 2) connector.

(f) Disconnect the D46 power steering oil pressure sensor connector.

(g) Disconnect the D6 camshaft position sensor connector.

(h) Disconnect the D3 crankshaft position sensor connector.

(m) Disconnect the A24 and D74 ECM connectors.

(n) Measure the resistance according to the value(s) in the table below.

Standard resistance:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

D74-80 (VCTA) - Body ground

Always

10 kΩ or higher

A24-57 (VCPA) - Body ground

Always

10 kΩ or higher

A24-59 (VCP2) - Body ground

Always

10 kΩ or higher

D74-66 (VCV2) - Body ground

Always

10 kΩ or higher

D74-67 (VCV1) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

REPLACE ECM

3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: VC Output C...

Last Modified: 9-16-2014

6.6 J

Doc ID: RM0000030MH06VX

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump Control Circuit; 2015 MY Tundra

[08/2014 - ]

Fuel Pump Control Circuit

DESCRIPTION

signal and sent to the fuel pump ECU. Based on the signal sent from the ECM, the fuel pump ECU adjusts the

fuel pump operation speed between 3 settings.

WIRING DIAGRAM

3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump C...

OK

OK

INSPECTION PROCEDURE

This troubleshooting procedure is based on the premise that the engine is started. If the engine is not started,

proceed to the problem symptoms table

.

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (FUEL PUMP)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON and turn the Techstream ON.

(c) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump

/ Speed.

(d) Check whether operating sounds can be heard while operating the relay using the Techstream.

OK:

Operating sounds can be heard from relay.

NG

GO TO STEP 7

2.

INSPECT FUEL PUMP

(a) Inspect the fuel pump

.

NG

REPLACE FUEL PUMP

3.

CHECK HARNESS AND CONNECTOR (FUEL PUMP - FUEL PUMP ECU)

(a) Disconnect the R6 fuel pump connector.

(b) Disconnect the R8 fuel pump ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

R6-4 (B) - R8-1 (FP)

Always

Below 1 Ω

R6-5 (E) - R8-2 (FP-)

Always

Below 1 Ω

3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump C...