The downhill assist control system helps to prevent excessive speed on steep downhill slopes.
The system will operate when the vehicle is traveling under 15 mph (25 km/h) with the accelerator and brake pedals released.
WARNING
â– When using downhill assist control system
Do not rely overmuch on the downhill assist control system.
This function does not extend the vehicle's performance limitations.
Always thoroughly check the road conditions, and drive safely.
System operation
Press the "DAC" switch
The downhill assist control system indicator will come on and the system will operate. When the system is in operation, the slip indicator light will flash, and the stop lights/high mounted stop lights will be lit. A sound may also occur during the operation. This does not indicate a malfunction.
Turning off the system
Press the "DAC" switch while the system is in operation.
The downhill assist control system indicator will flash as the system gradually ceases operation, and will turn off when the system is fully off.
Press the "DAC" switch while the downhill assist control system indicator is flashing to start the system again.
â– Operating tips
The system will operate when the shift lever is in a 1 range of S mode or R.
â– If the downhill assist control system indicator flashes
The system will gradually ceases operation. The indicator will flash during operation, and then go off when the system is fully off.
â– When the downhill assist control system is operated continuously
This may cause the brake actuator to overheat. In this case, the downhill assist control system will stop operating, a buzzer will sound and the downhill assist control system indicator will start flashing, and "Traction Control Turned OFF" will be shown on the multi-information display. Refrain from using the system until the downhill assist control system indicator stays on and the message goes off. (The vehicle can be driven normally during this time.)
â– Sounds and vibrations caused by the downhill assist control system
None of these are indicators that a malfunction has occurred.
â– System malfunction
In the following cases, have your vehicle checked by your Toyota dealer.
WARNING
â– The system may not operate on the following surfaces, which may lead to an accident causing death or serious injury
Engine coolant temperature circuit
Description
A thermistor, whose resistance value varies according to the ect, is built
into the engine coolant
temperature (ect) sensor.
The structure of the sensor and its connection to the ecm are the same as those
of the intake air
temperature (iat) sensor.
Hint:
When any of dtcs ...
Front seatback heater
Inspection
Inspect front seatback heater assembly
lh
Measure the resistance of the seatback heater.
Standard resistance
If the result is not as specified, replace the seatback
heater assembly
Inspect front seatback heater assembly
rh
Hint:
Use the same procedures desc ...
Disassembly
Remove sliding roof drive gear subassembly
Remove the claw and room light bracket.
Remove the 2 bolts and drive gear.
Remove sliding roof drain hose joint lh
Remove the screw and joint.
Remove sliding roof drain hose joint rh
Hint:
Use the same proced ...