Dynamic Laser Cruise Control System: Fail-Safe

HINT:

If a system malfunction occurs, the applicable DTCs will appear on the multi-information display.

1. The CRUISE main indicator light keeps blinking (until the cruise control main switch is turned off), the master warning light comes on with the warning sound "Pop", and the display shows "E3". The cruise control operation is suspended until turning the main switch on again. The auto cancel function deletes the stored vehicle speed and cancels the cruise control operation under the following conditions:
   1. When the vehicle speed signal malfunctions.
   2. When the electronic throttle parts malfunction.
   3. When the stop light switch has an open or short circuit.
   4. When the laser sensor malfunctions. (*1)
   5. When the light axis of the laser sensor deviates. (*1)

      *1: Only in the vehicle-to-vehicle distance control mode.

      Fig 1: Identifying Multi-Information Display (1 Of 3)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. The master warning light comes on with the warning sound "Pop" and the display shows "E2". The cruise control operation is suspended until the canceling condition is resolved (in the vehicle-to-vehicle distance control mode only). The auto cancel function cancels the cruise control operation under the following condition:
   1. When the wiper (Hi, Lo) operates (including the auto wiper).
   2. When the pattern select switch is in the "SNOW" mode.
   3. When the laser sensor receives strong light, such as sunlight, from the front side.
   4. When the vehicle-to-vehicle distance measurement is extremely unstable because of bad weather.
      Fig 2: Identifying Multi-Information Display (2 Of 3)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. The master warning light comes on with the warning sound "Pop" and the display shows "E1". The cruise control operation is suspended until the canceling condition is resolved (in the vehicle-to-vehicle distance control mode only). The auto cancel function cancels the cruise control operation under the following conditions:
   1. When the laser sensor has dirt on it.

      HINT:

      While the dynamic laser cruise control is operated, the ECM outputs a malfunction code for 0.15 sec. or more when it detects dirt.

If the following conditions are detected while the dynamic laser cruise control system is in operation, the system clears the stored vehicle speed and cancels the dynamic laser cruise control operation.

HINT:

In the vehicle-to-vehicle distance control mode, the stored vehicle speed in the ECM is maintained.

Fig 3: Identifying Multi-Information Display (3 Of 3)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002