P1570

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P1570: Radar Sensor Malfunction
P1570 - Radar Sensor Malfunction

DESCRIPTION

The millimeter wave radar sensor emits radar 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.





HINT
The millimeter wave radar sensor assembly monitors the millimeter wave circuit activation by itself. This DTC is output when one of the following occurs: 1) the monitor is malfunctioning, 2) an EEPROM error is detected, 3) a voltage error is detected, and 4) the millimeter wave radar sensor assembly is not adjusted. When raindrops or snowflakes strike the millimeter wave radar sensor assembly face, the distance between the vehicle in front and your own vehicle cannot be measured correctly. The dynamic radar cruise control system functions by detecting the beam reflections from 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.
- There are heavy emissions from a vehicle in front or vehicles in other lanes.
INSPECTION PROCEDURE

NOTICE:
When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the millimeter wave radar sensor assembly beam axis must be performed Adjustments.

PROCEDURE

1. ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY

(a) Adjust the millimeter wave radar sensor assembly Adjustments.

HINT
It is necessary to make the ECM recognize specification information (whether the vehicle is equipped with the dynamic radar cruise control system or not). When this procedure has not been carried out, this DTC may be output.

NEXT -- Continue to next step.

2. CHECK WHETHER DTC OUTPUT RECURS (DTC P1570)

(a) Clear the DTCs Dynamic Radar Cruise Control System.

(b) Perform the following to make sure that the DTC detection conditions are met.

HINT
If the detection conditions are not met, the malfunction cannot be detected.

(1) Drive the vehicle at a speed for which cruise control operation is possible.

(2) Turn the cruise control main switch on.

(c) Read the DTCs Dynamic Radar Cruise Control System.

Result:





B -- REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY Removal

A -- END