Toyota Tundra (2015 year). Manual — part 1549

P0343, P0348 (High voltage):

VVT sensor voltage

More than 4.7 V

COMPONENT OPERATING RANGE

VVT sensor voltage

0.3 to 4.7 V

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.

1.

Turn the ignition switch to ON and turn the Techstream on.

2.

Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).

3.

Turn the ignition switch off and wait for at least 30 seconds.

4.

Turn the ignition switch to ON and turn the Techstream on.

5.

Start the engine.

6.

Idle the engine for 10 seconds or more [A].

7.

Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].

8.

Read the pending DTC.

HINT:

If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.

9.

Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

10.

Input the DTC: P0340, P0342, P0343, P0345, P0347 or P0348.

11.

Check the DTC judgment result.

TESTER

DISPLAY

DESCRIPTION

NORMAL

DTC judgment completed

System normal

ABNORMAL

DTC judgment completed

System abnormal

INCOMPLETE

DTC judgment not completed

Perform driving pattern after confirming DTC enabling conditions

N/A

Unable to perform DTC judgment

12.

If the judgment result shows INCOMPLETE or N/A, perform steps [A] and [B] again.

13.

If no pending DTC is output, perform a universal trip and check for permanent DTCs

.

HINT:

If a permanent DTC is output, the system is malfunctioning.
If no permanent DTC is output, the system is normal.

14.

WIRING DIAGRAM

3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0340,P034...

INSPECTION PROCEDURE

HINT:

Bank 2 refers to the bank that does not include the No. 1 cylinder.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE)

(a) Disconnect the D37 or D39 VVT sensor (for intake side)

connector.

(b) Measure the voltage according to the value(s) in the

table below.

Standard voltage:

TESTER CONNECTION

SWITCH

CONDITION

SPECIFIED

CONDITION

D37-3 (VC) - Body

ground

Ignition switch ON

4.5 to 5.0 V

3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0340,P034...

OK

OK

TESTER CONNECTION

SWITCH

CONDITION

SPECIFIED

CONDITION

D39-3 (VC) - Body

ground

Ignition switch ON

4.5 to 5.0 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.

CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR INTAKE SIDE) - ECM)

(a) Disconnect the D37 or D39 VVT sensor (for intake side) connector.

(b) Disconnect the D74 ECM connector.

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

Standard resistance:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

D37-1 (VVL+) - D74-92 (VV1+)

Always

Below 1 Ω

D37-2 (VVL-) - D74-91 (VV1-)

Always

Below 1 Ω

D39-1 (VVR+) - D74-87 (VV2+)

Always

Below 1 Ω

D39-2 (VVR-) - D74-88 (VV2-)

Always

Below 1 Ω

D37-1 (VVL+) or D74-92 (VV1+) - Body ground

Always

10 kΩ or higher

D37-2 (VVL-) or D74-91 (VV1-) - Body ground

Always

10 kΩ or higher

D39-1 (VVR+) or D74-87 (VV2+) - Body ground

Always

10 kΩ or higher

D39-2 (VVR-) or D74-88 (VV2-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.

CHECK SENSOR INSTALLATION (VVT SENSOR (FOR INTAKE SIDE))

3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0340,P034...

OK

OK

OK

NEXT

(a) Check the VVT sensor (for intake side) installation.

OK:

Sensor is installed correctly.

NG

SECURELY REINSTALL SENSOR

4.

CHECK INTAKE CAMSHAFT (TEETH)

Teeth do not have any cracks or deformation.

NG

REPLACE INTAKE CAMSHAFT

5.

CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)

NG

CHECK ENGINE MECHANICAL SYSTEM

6.

REPLACE VVT SENSOR (FOR INTAKE SIDE)

(a) Replace the VVT sensor (for intake side)

.

3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0340,P034...