Toyota Tundra (2015 year). Manual — part 1315

10.

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY -
ECM - ST RELAY)

(a) Remove the ST relay from the engine room relay block.

(b) Disconnect the Park/Neutral Position (PNP) switch assembly

connector.

(c) Disconnect the ECM connector.

(d) Measure the resistance according to the value(s) in the table

below.

Standard Resistance:

TESTER CONNECTION

CONDITION

SPECIFIED

CONDITION

D35-5 (L) or A24-46 (STA) - Body

ground

Always

10 kΩ or higher

D35-5 (L) or ST relay (1) - Body

ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

REPLACE ECM

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Cranking Hold...

Last Modified: 9-16-2014

6.6 J

Doc ID: RM00000222508HX

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: ACIS Control Circuit; 2015 MY Tundra [08/2014 - ]

ACIS Control Circuit

DESCRIPTION

This circuit opens and closes the Intake Air Control Valve (IACV) in response to the engine load in order to

increase the intake efficiency (ACIS: Acoustic Control Induction System).

WIRING DIAGRAM

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: ACIS Control ...

INSPECTION PROCEDURE

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE VSV FOR ACIS)

(a) Disconnect the vacuum hose from port F on the vacuum

switching valve (for ACIS).

(b) Connect the Techstream to the DLC3.

(c) Start the engine.

(d) Enter the following menus: Powertrain / Engine and ECT /

Active Test / Active the VSV for Intake Control.

(e) Operate the VSV for ACIS.

(f) Check the VSV air flow when switching the VSV.

OK:

TEST CONDITION

SPECIFIED CONDITION

VSV is ON

Air from port E flows out through port F

VSV is OFF

Air from port E flows out through air filter

NG

GO TO STEP 4

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: ACIS Control ...

OK

OK

OK

2.

CHECK VACUUM HOSES (VACUUM SWITCHING VALVE - INTAKE AIR CONTROL VALVE,
INTAKE MANIFOLD)

NG

REPAIR OR REPLACE VACUUM HOSES

3.

INSPECT INTAKE MANIFOLD (INTAKE AIR CONTROL VALVE)

(a) Inspect the intake air control valve

.

NG

REPLACE INTAKE MANIFOLD

OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN

IN PROBLEM SYMPTOMS TABLE

4.

INSPECT VACUUM SWITCHING VALVE (FOR ACIS)

(a) Inspect the vacuum switching valve (for ACIS)

.

NG

REPLACE VACUUM SWITCHING VALVE (FOR ACIS)

5.

CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE - ECM AND
INTEGRATION RELAY)

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: ACIS Control ...