P1570
CRUISE CONTROL: DYNAMIC LASER CRUISE CONTROL SYSTEM: P1570, P1572: Radar Sensor Malfunction
P1572 - Improper Aiming of Radar Sensor Beam Axis
DESCRIPTION
The laser radar sensor emits laser beams towards an object in front and measures the distance and direction of the object by receiving the beam reflections. Based on the reflections, the sensor calculates the difference in speed between your own vehicle and an object in front. This data is transmitted to the distance control ECU.
The laser radar sensor monitors the laser emission and reception by itself. P1570 is detected when it cannot monitor. When rain drops or snowflakes strike the laser radar sensor face, the distance between the vehicle in front and your own vehicle cannot be measured correctly. The dynamic laser cruise control system functions by detecting the reflector of the vehicle directly in front. In the following cases, the system may not be able to detect the vehicle in front and may not properly maintain the correct vehicle-to-vehicle distance:
- The vehicle in front is a tall trailer.
- The back of the vehicle in front is extremely dirty.
- Exhaust emissions from the vehicle in front or vehicles in other lanes are unusually thick.
- The vehicle in front has no reflective surface.
- The laser radar sensor is receiving strong light (sunlight, etc. )
P1572 is output when the scanning angle of the laser radar sensor is incorrect. P1572 is also output when the laser radar sensor beam axis is determined to be in an incorrect position
INSPECTION PROCEDURE
NOTICE:
When the laser radar sensor is replaced with a new one, adjustment of the laser radar sensor beam axis must be performed Laser Sensor.
PROCEDURE
1. ADJUST LASER RADAR SENSOR
(a) Adjust laser radar sensor Laser Sensor.
HINT
It is necessary to make the ECM recognize specification information (whether the vehicle is equipped with the dynamic laser cruise control system or not). When this procedure has not been carried out, this DTC may be output.
NEXT -- Continue to next step.
2. CLEAR DTC
(a) Clear the DTC Dynamic Laser Cruise Control System.
NEXT -- Continue to next step.
3. CHECK FOR DTC
(a) Reproduce the DTC detection conditions under which the DTC is stored.
HINT
If the DTC detection conditions are not correct, the system will not detect the trouble.
(b) Drive the vehicle at a speed of 45 km/h (28 mph) or more and turn the cruise control main switch ON. Push the -SET switch to activate the cruise control system.
(c) Check for DTCs Dynamic Laser Cruise Control System.
OK:
DTC is not output.
NG -- REPLACE LASER RADAR SENSOR Removal
OK -- END