Toyota Tundra (2015 year). Manual — part 2060
OK
OK
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
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
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: ACIS Control ...
OK
SHOWN IN PROBLEM SYMPTOMS TABLE
4.
INSPECT VACUUM SWITCHING VALVE
(a) Inspect the vacuum switching valve
.
NG
REPLACE VACUUM SWITCHING VALVE
5.
CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE - ECM AND
INTEGRATION RELAY)
(a) Remove the EFI NO. 2 fuse from the engine room relay block.
(b) Check the EFI NO. 2 fuse.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
EFI NO. 2 fuse
Always
Below 1 Ω
(d) Reinstall the EFI NO. 2 fuse.
(e) Disconnect the D62 intake air control valve connector.
(f) Disconnect the D74 ECM connector.
(g) Remove the integration relay from the engine room relay block
.
(h) Disconnect the 1B integration relay connector.
(i) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
D62-2 - D74-62 (ACIS)
Always
Below 1 Ω
D62-1 - 1B-4
Always
Below 1 Ω
D62-2 or D74-62 (ACIS) - Body ground
Always
10 kΩ or higher
D62-1 or 1B-4 - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPLACE ECM
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: ACIS Control ...
Last Modified: 9-16-2014
6.6 J
Doc ID: RM000004G8F0RMX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Brake Override System; 2015 MY Tundra [08/2014 -
]
Brake Override System
DESCRIPTION
When the vehicle is being driven, depressing the accelerator pedal sensor assembly and brake pedal will
activate the brake override system to restrict driving torque. The conditions for activating the brake override
system as well as the items that are controlled are explained below.
Activation Conditions:
Vehicle is running at or above the specified speed.
When the accelerator pedal and brake pedal are depressed.
NOTICE:
Items Controlled:
Driving torque is restricted.
HINT:
When this control is activated, the accelerator opening value is forcibly reduced to a fixed value.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Brake Overrid...
Deactivation Conditions:
When the brake pedal or the accelerator pedal returns to some degree.
INSPECTION PROCEDURE
Inspection Method
Example:
Drive at 10 km/h (6.25 mph), depress the accelerator pedal by 1/2 to 3/4 and keep it in that position. Under
these conditions, if the engine speed decreases to 1000 rpm when the brake pedal is depressed, the brake
override system has been activated.
CAUTION:
When carrying out the inspection, use a place where you are able to carry it out safely and also pay
close attention to your surroundings.
Also, when driving, make absolutely sure that all traffic laws, such as speed limits, are observed.
HINT:
Under normal conditions, the Accelerator Position value changes in response to the Accel Sens. No. 1
Volt % value. For more information on the numerical values, refer to the Data List
.
If the Accelerator Position in the Data List and Accel Sens. No.1 Volt % values diverge and the
Accelerator Position value in the Data List is fixed even though Accel Sens. No.1 Volt % is changing,
check that this control is activated (use the Techstream data saving function to record data while driving
the vehicle, and then confirm it after driving is completed).
NOTICE:
The brake override system restricts driving torque if the brake pedal is depressed when driving with the
pedal.
PROCEDURE
1.
CHECK DTC OUTPUT
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Enter the following menus: System Select / Health Check.
(d) Check DTCs.
Result
RESULT
PROCEED TO
No DTC output
A
DTC output
B
B
GO TO DTC CHART
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Brake Overrid...
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