Toyota Tundra (2015 year). Manual — part 2643
Last Modified: 9-16-2014
6.6 D
Doc ID: RM000000PLZ0DRX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: CRUISE CONTROL: CRUISE CONTROL SYSTEM: SYSTEM DESCRIPTION; 2015 MY Tundra [08/2014 -
]
SYSTEM DESCRIPTION
1. CRUISE CONTROL SYSTEM
This system is controlled by the ECM, and is activated by the throttle position sensor and motor. The ECM
controls the following functions: ON-OFF, SET / COAST, RESUME / ACCEL, CANCEL, vehicle speed operation,
motor output control, and shift down control.
The ECM compares the driving vehicle speed from the vehicle speed sensor with the stored vehicle
stored speed.
The ECM receives signals such as ON-OFF, SET / COAST, RESUME / ACCEL, and CANCEL from the
cruise control main switch and executes them.
The ECM illuminates the combination meter's cruise control indicator light when it receives the
cruise control main switch ON signal.
The ECM illuminates the combination meter assembly cruise control SET indicator light when vehicle
speed control begins after the cruise control switch is pushed to -SET while driving.
The ECM cancels the cruise control system when the brake pedal is depressed and the ECM receives
the stop light switch signal.
The ECM cancels the cruise control system when the shift lever is moved from D (6th, 5th, 4th, 3rd,
2nd or 1st gear) to N or when the shift lever is used to select the 3rd, 2nd or 1st gear with the shift
lever in S, and the ECM receives the PNP switch signal.
cruise control switch
2. LIMIT CONTROL
(a) Low speed limit
control operation will be automatically canceled and the stored vehicle speed will be maintained when
the vehicle speed decreases below the low speed limit 40 km/h (25 mph) while the cruise control is in
operation.
(b) High speed limit
RESUME / ACCEL cannot be used to increase speed beyond the high speed limit.
3. OPERATION OF CRUISE CONTROL
The cruise control main switch operates 7 functions: SET, COAST, TAP-DOWN, RESUME, ACCEL, TAP-UP, and
CANCEL. The SET, TAP-DOWN and COAST functions, and the RESUME, TAP-UP and ACCEL functions are
operated with the same switch. The cruise control main switch is an automatic return type switch which turns
on only while operating it in each arrow direction and turns off after releasing it.
(a) SET CONTROL
Vehicle speed is stored and constant speed control is maintained when pushing the switch to SET /
COAST while driving with the cruise control main switch ON (the cruise control indicator light is on), and
the vehicle speed is within the set speed range (between the low and high speed limits).
CRUISE CONTROL: CRUISE CONTROL SYSTEM: SYSTEM DESC...
(b) COAST CONTROL
When the cruise control main switch is set to SET / COAST and held in that position while the cruise
control system is operating, the ECM sends a "throttle valve opening angle 0°" demand signal to the
cruise control system. Then the vehicle speed, when the cruise control main switch is released, is stored
and maintained.
HINT:
When tapping down the cruise control main switch to SET / COAST (for approximately 0.6 seconds)
while the cruise control system is in operation, the stored vehicle speed decreases each time by
approximately 1.6 km/h (1.0 mph). However, when the difference between the driving and stored
vehicle speed is more than approximately 5 km/h (3.1 mph), the stored vehicle speed is set to the
actual vehicle speed at the moment the cruise control main switch is turned ON from SET / COAST and
constant speed control is maintained.
(d) ACCELERATION CONTROL
cruise control system is in operation. When the cruise control main switch is released from RESUME /
ACCEL, the vehicle speed is stored and the vehicle is controlled at a constant speed.
(e) TAP-UP CONTROL
When tapping up the cruise control main switch to RESUME / ACCEL (for approximately 0.6 seconds)
while the cruise control system is in operation, the stored vehicle speed increases each time by
approximately 1.6 km/h (1.0 mph). However, when the difference between the driving and the stored
vehicle speed is more than approximately 5 km/h (3.1 mph), the stored vehicle speed will not be
changed.
(f) RESUME CONTROL
If cruise control operation was canceled with the stop light switch or the CANCEL switch, and if driving
speed is within the limit range, pushing the cruise control main switch to RESUME / ACCEL restores the
(1) When the vehicle is cruising uphill, the transmission may shift down according to AT control. After
the ECM judges that uphill cruising has ended based on the throttle valve angle, the transmission
will shift up. If the transmission shifts down during acceleration or resume control is completed.
(h) CANCEL CONTROL
(1) Manual cancel
Depressing the brake pedal.
Moving the shift lever from D to N.
With the shift lever on S, shifting to 1st, 2nd or 3rd gear.
Pulling the cruise control main switch to CANCEL.
Turning the cruise control main switch OFF (the stored vehicle speed in the ECM is not
maintained).
(2) Auto cancel
Operating the VSC system
4. Others
CRUISE CONTROL: CRUISE CONTROL SYSTEM: SYSTEM DESC...
(a) If the VSC is operated, the cruise control is automatically canceled. (The preset speed is not cleared.)
(b) The preset speed is cleared when ignition switch is once turned off.
(c) for 4WD:
If the 4WD system outputs cruise control cancel signal, cruise control system is automatically canceled.
(The preset speed is not cleared)
5. AUTO CANCEL (FAIL-SAFE)
This system has an automatic cancellation function (fail-safe)
.
CRUISE CONTROL: CRUISE CONTROL SYSTEM: SYSTEM DESC...
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A
Last Modified: 9-16-2014
6.6 D
Doc ID: RM000002L6T02IX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: CRUISE CONTROL: CRUISE CONTROL SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING; 2015
MY Tundra [08/2014 - ]
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
Use these procedures to troubleshoot the cruise control system.
*: Use the Techstream.
1.
VEHICLE BROUGHT TO WORKSHOP
2.
INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
3.
CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*
(a) Use the Techstream to check if the CAN communication system is functioning normally.
Result
RESULT
PROCEED TO
CAN DTC is not output
A
CAN DTC is output
B
B
Go to CAN COMMUNICATION SYSTEM
4.
CHECK INDICATOR
CRUISE CONTROL: CRUISE CONTROL SYSTEM: HOW TO PRO...
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