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:

Removal
1. REMOVE INSTRUMENT CLUSTER CENTER NO. 1 FINISH PANEL 2. REMOVE INSTRUMENT CLUSTER CENTER NO. 2 FINISH PANEL 3. REMOVE SHIFT LEVER KNOB SUB-ASSEMBLY 4. REMOVE POSITION INDICATOR HOUSING ASSEMBLY 5. REMOVE INSTRUMENT CLUSTER CENTER LOWER FINISH PANEL SUB-ASSEMBLY 6. REMOVE CIGARETTE LIGHTER CO ...

Initialization
1. ZERO POINT CALIBRATION NOTICE: Make sure that the front passenger seat is not occupied before performing the operation. HINT: Perform the zero point calibration and sensitivity check if any of the following conditions occur.  The occupant classification ECU is replaced.  Acc ...

Adjustment
1. INSPECT SHIFT LEVER POSITION (a) When shifting from P to R position only with ignition switch ON and brake pedal, make sure that the shifting lever moves smoothly and can be moderately operated. (b) When starting engine, make sure that the vehicle moves forward when shifting from N to D p ...

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