Toyota RAV4 manuals

Toyota Sienna Service Manual: Radar Sensor Malfunction

DTC P1570 Radar Sensor Malfunction

DESCRIPTION

The laser 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.

DTC No.

DTC Detection Condition

Trouble Area

P1570

The ECM detects a laser sensor malfunction signal for 0.15 sec. or more while the dynamic laser cruise control is in operation Laser sensor

HINT: The laser sensor monitors the laser emission and reception by itself. This DTC is detected when it cannot monitor. When rain drops or snowflakes strike the laser 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:

INSPECTION PROCEDURE

NOTICE: When the laser sensor is replaced with a new one, adjustment of the laser sensor beam axis must be performed

1 ADJUST LASER SENSOR

Refer to adjustment.

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.

  1.  Clear the DTCs and then recheck for DTCs.

OK: DTC is not output.

SYSTEM IS OK

Control Module Performance
DTC P0607 Control Module Performance DESCRIPTION This DTC indicates a malfunction in the ECM. HINT: The ECM receives signals from each sensor to control all the functions of the cruise control w ...

Improper Aiming of Radar Sensor Beam Axis
DTC P1572 Improper Aiming of Radar Sensor Beam Axis DESCRIPTION This DTC is output when the scanning angle of the laser sensor is incorrect. This DTC is also output when the laser sensor beam axi ...

Other materials:

Master cylinder pressure sensor check (when using sst check wire)
(a) Leave the vehicle in a stationary condition and release the brake pedal for 1 second or more, and quickly depress the brake pedal with a force of 98 N (10 kgf, 22 lbf) or more for 1 second or more. (b) Check the ABS warning light stays on for 3 seconds. HINT: At this time, the ABS wa ...

Installation
1. INSTALL WINDSHIELD GLASS NO.2 STOPPER  Coat the installation part of the stoppers with Primer G. NOTICE:  Allow the primer coating to dry for 3 minutes or more.  Do not keep any of the opened Primer G for later use.  Do not apply too much Primer . ...

Data list / active test
HINT: By accessing the DATA LIST displayed by the intelligent tester, you can perform such functions as reading the values of switches and sensors without removing any parts. Reading the DATA LIST as the first step in troubleshooting is one method to shorten labor time. 1. DATA LIST FOR OCCUPA ...

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