Intuitive Parking Assist System (Diagnostics - Introduction): Other Lexus RX III

PRECAUTION

Note. When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.

1. PRECAUTIONS FOR INTUITIVE PARKING ASSIST SYSTEM Under the following conditions, the detection function may not function properly: A sensor is covered with foreign matter, such as mud or snow (detection function returns to normal when the sensor is cleaned). A sensor is frozen (detection function returns to normal when the temperature of the sensor rises). A hand is blocking a sensor. HINT: In very cold weather where a malfunction display appears, the sensor may not be able to detect obstacles. If the malfunction display appears, visually check the sensor first. If the sensor is free of foreign matter but the malfunction display remains, the sensor may have a malfunction. The detection range may be affected by the following conditions: A sensor is covered with foreign matter, such as mud or snow. The vehicle is in an excessively hot or excessively cold area. Under the following conditions, a detection error may occur: Driving on a bumpy road, an unpaved road or in tall grass. Ultrasonic waves are received from the horn or parking sonar system of another vehicle, a motorcycle engine, or the air brakes of a large vehicle. It is raining heavily or the sensor is splashed with water. The vehicle is tilted at a steep angle. The vehicle is equipped with a fender pole or a wireless antenna mechanism. A sensor is covered with foreign matter, such as mud or snow. The vehicle is moving forward or backward towards high curbs or objects that are perpendicular to the ground. A sensor is sprayed with high pressure water or steam. A towing hitch is mounted on the vehicle. The sensors cannot detect the following objects: Thin objects, such as wires and ropes. Materials that absorb ultrasonic waves, such as cotton, snow, etc. Objects with sharp edges. Short objects. Objects that are tall and protrude toward the vehicle above the detection range of the sensors. Other notices: The sensors cannot detect objects directly under the bumper. (A sensor may detect low objects and thin poles, and then lose track of them.) Beware that the detection range of this system is limited. In certain conditions, some objects may not be detected. As a result, always make sure to check all around the vehicle when driving or parking. The sensors may not be able to detect obstacles that are too close to the sensor. The sensors may not be able to detect obstacles if the sensors have been dropped or subjected to a strong impact.

1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL NOTE: After the engine switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the engine switch off, make sure to wait at least 60 seconds before disconnecting the cable from the negative (-) battery terminal. When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the terminal is reconnected. System Name See Procedure Parking Assist Monitor System Refer to «INITIALIZATION»(ref-400649-S34584305262011051800000) Side Monitor System (w/ Parking Assist Monitor System) Back Door Closer System Power Back Door System
2. PRECAUTIONS FOR INTUITIVE PARKING ASSIST SYSTEM Under the following conditions, the detection function may not function properly: A sensor is covered with foreign matter, such as mud or snow (detection function returns to normal when the sensor is cleaned). A sensor is frozen (detection function returns to normal when the temperature of the sensor rises). A hand is blocking a sensor. HINT: In very cold weather where a malfunction display appears, the sensor may not be able to detect obstacles. If the malfunction display appears, visually check the sensor first. If the sensor is free of foreign matter but the malfunction display remains, the sensor may have a malfunction. The detection range may be affected by the following conditions: A sensor is covered with foreign matter, such as mud or snow. The vehicle is in an excessively hot or excessively cold area. Under the following conditions, a detection error may occur: Driving on a bumpy road, an unpaved road or in tall grass. Ultrasonic waves are received from the horn or parking sonar system of another vehicle, a motorcycle engine, or the air brakes of a large vehicle. It is raining heavily or the sensor is splashed with water. The vehicle is tilted at a steep angle. The vehicle is equipped with a fender pole or a wireless antenna mechanism. A sensor is covered with foreign matter, such as mud or snow. The vehicle is moving forward or backward towards high curbs or objects that are perpendicular to the ground. A sensor is sprayed with high pressure water or steam. A towing hitch is mounted on the vehicle. The sensors cannot detect the following objects: Thin objects, such as wires and ropes. Materials that absorb ultrasonic waves, such as cotton, snow, etc. Objects with sharp edges. Short objects. Objects that are tall and protrude toward the vehicle above the detection range of the sensors. Other notices: The sensors cannot detect objects directly under the bumper. (A sensor may detect low objects and thin poles, and then lose track of them.) Beware that the detection range of this system is limited. In certain conditions, some objects may not be detected. As a result, always make sure to check all around the vehicle when driving or parking. The sensors may not be able to detect obstacles that are too close to the sensor. The sensors may not be able to detect obstacles if the sensors have been dropped or subjected to a strong impact.

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COMMUNICATION TABLE

1. *1: w/o Side Monitor System
2. *2: w/ Side Monitor System
3. *3: w/ Navigation System

Scheme 64

1. GENERAL This system uses ultrasonic sensors to detect any obstacles at the corners and the rear of the vehicle. The system then informs the driver of the distance between the sensors and the obstacles as well as their positions by indicating them on the multi-information display (in the combination meter) and multi-display (w/ Navigation System) and by sounding a buzzer.
2. FUNCTION OF COMPONENTS Component Function Ultrasonic Sensor (6) Detects the distance between the vehicle and an obstacle Clearance Warning Buzzer Sounds 1 second to inform the driver when the intuitive parking assist system power is turned on (the engine switch is on (IG) and the intuitive parking assist system is on)*1 Sounds to inform the driver according to the distance to an obstacle Multi-information Display on the Combination Meter Assembly Displays the location of an obstacle and the approximate distance between the vehicle and the obstacle Displays a malfunction of the ultrasonic sensor to inform the driver Clearance Sonar Indicator on the Combination Meter Assembly Illuminates to inform the driver while the intuitive parking assist system power is on (the engine switch is on (IG) and the intuitive parking assist system is on) Combination Meter Assembly Transmits the vehicle speed signal to the clearance warning ECU or parking assist ECU Steering Pad Switch Assembly (Multi-information Switch) Operating this switch enables, disables or cuts off the operation of the intuitive parking assist system Clearance Warning ECU*2 Judges the approximate distance between the vehicle and an obstacle based on the signals from the ultrasonic sensors and sends it to the multi-information display and display and navigation module display Sounds the buzzer Parking Assist ECU*3 Judges the approximate distance between the vehicle and an obstacle based on the signals from the ultrasonic sensors and sends it to the multi-information display and display and navigation module display*4 Sounds the buzzer Receives the display signal and send it to the multi-display*4 through the digital communication cable Main Body ECU (Multiplex Network Body ECU) Transmits the destination information to the clearance warning ECU*2 or parking assist ECU*3 ECM Transmits the shift position signal to the clearance warning ECU*2 or parking assist ECU*3 Display and Navigation Module Display*4 Receives the ultrasonic sensor information through the CAN communication and sends it to the parking assist ECU*3 or multi-display*4 through the digital communication cable Transmit the customize information on the multi-display to the clearance warning ECU*2 or parking assist ECU*3 Multi-display Assembly*4 Receives the display signals from the display and navigation module display*2 or parking assist ECU*3, and displays them on the display panel. *1: The buzzer does not sound when the engine switch is on (IG) while the clearance main switch is on. *2: w/o Side Monitor System *3: w/ Side Monitor System *4: w/ Navigation System
3. OPERATION EXPLANATION The operating conditions of each ultrasonic sensor differ according to the installation position as shown in the table below. Installation Position Operating Condition Front Corner Sensor Engine switch is on (IG). Intuitive parking assist system is on. Shift position is in any position except P. Vehicle speed is less than approximately 10 km/h (6.2 mph). The sensors stop operating when the vehicle speed exceeds 15 km/h (9.3 mph), and start operating when the vehicle speed drops below 10 km/h (6.2 mph). Rear Corner Sensor Engine switch is on (IG). Intuitive parking assist system is on. Shift lever is in R. Rear Center Sensor Engine switch is on (IG). Intuitive parking assist system is on. Shift lever is in R. When the system operates, the clearance warning ECU*1 or parking assist ECU*2 transmits ultrasonic waves from the ultrasonic sensors. If these waves encounter an obstacle within one or more of the sensors ranges, the waves are reflected back to the sensors, which transmit them to the clearance warning ECU. Based on this information, the clearance warning ECU*1 or parking assist ECU*2 sends signals to the indicator and the clearance warning buzzer. The appropriate distance between the vehicle and the obstacle is then indicated, and the buzzer sounds. *1: w/o Side Monitor System *2: w/ Side Monitor System HINT: Refer to Detection Range Measurement and Display Inspection. Refer to «OPERATION CHECK»(ref-400915-S37069997602011051800000) .
4. COMMUNICATION SIGNALS OF COMPONENTS HINT: Allocation refers to the process of the clearance warning ECU*1 or parking assist ECU*2 setting aside IDs for the sensors. The vehicle has the sensors arranged in 2 groups. There is a front series and a rear series. The sensors are connected in a "daisy chain". *1: w/o Side Monitor System *2: w/ Side Monitor System Initialization mode: An ID is allocated to each sensor and sensor diagnosis is performed. When the initial check is operating (the engine switch is on (IG) and the intuitive parking assist system is on), the clearance warning ECU*1 or parking assist ECU*2 provides power to the first sensors in each series (front left sensor and rear right sensor). *1: w/o Side Monitor System *2: w/ Side Monitor System HINT: Refer to Self-check Function Inspection (Initial Check). Refer to «OPERATION CHECK»(ref-400915-S37069997602011051800000) . After the power is supplied, the front left sensor and rear right sensor enter standby mode to receive an ID from the ECU. When a certain amount of time has elapsed, the ECU sends an ID allocation signal to these sensors. The front left sensor and rear right sensor receive the ID allocation signal from the ECU and perform self-diagnosis. When the sensor self-diagnosis is completed, the ECU sends an ID allocation confirmation signal to these sensors. After the ID allocation confirmation is performed, the ECU provides power to the second sensors in each series (front right sensor and rear right center sensor) via the first sensors. In the same manner as the first sensors, the second sensors enter standby mode. When a certain amount of time has elapsed, the ECU sends an ID allocation signal to the second sensors. The above operation will be repeated until an ID is allocated to the last sensor, which is in the rear series (rear left sensor). Initialization ends when ID allocation to all ultrasonic sensors is completed. Detection mode: After initialization mode is completed, the system switches into detection mode. In detection mode, the clearance warning ECU*1 or parking assist ECU*2 sends information request signals and sensor activation signals to the ultrasonic sensors and receives detection result signals from the sensors. *1: w/o Side Monitor System *2: w/ Side Monitor System The ECU regularly sends ID signals, information request signals, and sensor activation signals to each ultrasonic sensor according to the communication schedule. When a certain amount of time has elapsed (sensor detection operation is completed), the ECU sends an ID signal to the sensor to receive a detection result signal. The ultrasonic sensor sends a detection result signal or detection information signal to the ECU. The above operation is performed repeatedly for each ultrasonic sensor.

CUSTOMIZE PARAMETERS

1. CUSTOMIZE PARAMETERS (Using Techstream) NOTE: When the customer requests a change in a function, first make sure that the function can be customized. Be sure to make a note of the current settings before customizing. When troubleshooting a function, first make sure that the function is set to the default setting. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the intuitive parking assist system on. Turn the Techstream on. Enter the following menus: Body Electrical / Intuitive P/A / Utility / Customize Setting. Select the setting by referring to the table below. WARNING Display Default Content Setting Rr Sensor Onset Range Wide Set the buzzer activation range for the rear center sensors. Narrow or Wide Narrow: 600 mm (23.62 in.) Wide: 1500 mm (59.06 in.) Keep Sense Buzzer Avail Make the buzzer sound when the distance between the vehicle and obstacle does not change for more than 3 seconds. Not Avail or Avail Not Avail: Not Available Avail: Available Fr & Rr Buzzer Volume M2 Change the buzzer volume setting. L, M1, M2, M3 or H L: Low volume M1: Medium low volume M2: Medium volume M3: Medium high volume H: High volume SENSOR Display Default Content Setting Sensor Condition N Avail Make the front sensors available when the shift lever is in N. Not Avail or Avail Not Avail: Not Available Avail: Available Reverse Range Front Sensor F Change the operation setting for the front sensors when the shift lever is in R. F or F Stop F: Front sensors are available F Stop: Front sensors are not available Non P/R Range Rear Sensor R Stop Change the operation setting for the rear sensors when the shift lever is in any position except P or R. R, Rcrn or R Stop R: All rear sensors are available Rcrn: Rear corner sensors are available R Stop: All rear sensors are not available DISPLAY Display Default Content Setting Display Mode All The display mode setting (when the intuitive parking assist system is normal). All or Undisp
2. CUSTOMIZE PARAMETERS (On Multi-display) NOTE: When the customer requests a change in a function, first make sure that the function can be customized. Be sure to make a note of the current settings before customizing. When troubleshooting a function, first make sure that the function is set to the default setting. Turn the engine switch on (IG). Turn the intuitive parking assist system on. Select the following menus: Setup / Vehicle / Intuitive park assist. Select the setting by referring to the table below. Display Default Content Setting Alert volume 3 Change the buzzer volume setting. 1, 2, 3, 4 or 5 1: Low volume 2: Medium low volume 3: Medium volume 4: Medium high volume 5: High volume Display On The display mode setting (when the intuitive parking assist system is normal). On or Off Distance Wide Set the buzzer activation range for the rear center sensors. Narrow or Wide Narrow: 600 mm (23.62 in.) Wide: 1500 mm (59.06 in.)