Toyota Tundra (2015 year). Manual — part 225
Last Modified: 9-16-2014
6.6 D
Doc ID: RM000000ONN032X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: TEST MODE PROCEDURE; 2015 MY Tundra
[08/2014 - ]
TEST MODE PROCEDURE
HINT:
By switching the skid control ECU from normal mode to test mode, abnormality detection sensitivity is
enhanced and troubleshooting can be conducted efficiently.
Perform a sensor check in test mode after the speed sensor or sensor rotor has been repaired or replaced.
If the ignition switch is turned from ON to ACC or off during test mode, DTCs related to the signal check
function will not be erased. During test mode, do not change to normal mode.
During test mode, the skid control ECU stores all DTCs related to the signal check function, and the DTCs
are erased if normality is confirmed. Any remaining DTCs indicate abnormalities that were found.
1. TEST MODE (SIGNAL CHECK) PROCEDURE (WHEN USING TECHSTREAM)
(c) Check that the steering wheel is in the centered position.
(d) Check that the shift lever is in parking or neutral and apply the parking brake.
CAUTION:
(e) Connect the Techstream to the DLC3.
(f) Turn the ignition switch to ON.
(g) Turn the Techstream on.
(h) Switch the skid control ECU to test mode using the Techstream.
Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Signal Check.
(i) Check that the ABS warning light and SLIP indicator light blink as
shown in the illustration.
(j) Start the engine.
2. TEST MODE (SIGNAL CHECK) PROCEDURE (WHEN USING SST CHECK WIRE)
(c) Check that the steering wheel is in the centered position.
(d) Check that the shift lever is in parking or neutral and apply the parking brake.
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: T...
CAUTION:
(f) Turn the ignition switch to ON.
(g) Check that the ABS warning light and SLIP indicator light blink
as shown in the illustration.
(h) Start the engine.
3. MASTER CYLINDER PRESSURE SENSOR CHECK
(a) Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly
If the sensor check has been completed normally, DTC C1281/81 is cleared and the ABS warning light
turns on for 3 seconds.
4. DECELERATION SENSOR CHECK
HINT:
The skid control ECU checks whether the lateral acceleration reaches 0.1 G or more while the vehicle is
turning.
The table shows the vehicle speeds and turning radius under which the lateral acceleration reaches 0.1 G
or more.
Reference
VEHICLE SPEED
KM/H (MPH)
TURNING RADIUS
M (FT.)
10 (6)
7.87 (25.82)
15 (9)
17.72 (58.13)
20 (12)
31.49 (103.31)
25 (16)
49.21 (161.45)
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: T...
If the sensor check has been completed normally, DTC C1279/79 is cleared.
Do not spin the wheels.
5. SPEED SENSOR CHECK
(a) Check that the ABS warning light is blinking as shown in the
illustration.
(b) Check the forward signal.
NOTICE:
The signal check may not be completed if the vehicle has its wheels spun or the steering wheel is turned
during this check.
(c) Stop the vehicle.
NOTICE:
The speed sensor signal check may not be completed if the speed sensor signal check is started while
turning the steering wheel or spinning the wheels.
If the signal check has not been completed, the ABS warning light blinks while driving and the ABS system
does not operate.
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: T...
HINT:
When the signal check has been completed, the ABS warning light turns off while driving and blinks in the
test mode pattern while stationary.
6. READ SIGNAL CHECK FUNCTION DTCs (WHEN USING TECHSTREAM)
(a) Read the DTC(s) by following the instructions on the Techstream screen.
7. READ SENSOR SIGNAL CHECK FUNCTION DTCs (WHEN USING SST CHECK WIRE)
SST: 09843-18040
(b) Turn the ignition switch to ON.
If all sensors are normal, a normal system code is output (the light comes on at 0.25 second intervals).
8. SENSOR SIGNAL CHECK FUNCTION DTCs
ABS sensor:
DTC
CODE
DIAGNOSIS
TROUBLE AREAS
Speed sensor circuit
Sensor installation
Speed sensor circuit
Sensor installation
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: T...
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