Intuitive Parking Assist System (Diagnostics - Introduction): Other Toyota Venza I facelift

PRECAUTION [08/2013 - ]

1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL NOTE: When disconnecting the cable from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected. System Name See Procedure Back Door Closer System Refer to INITIALIZATION [08/2013 - ] Power Back Door System
2. PRECAUTIONS FOR INTUITIVE PARKING ASSIST SYSTEM Under the following conditions, the detection function may not function properly: 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. 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. 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.) Be aware 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.

Scheme 9

Scheme 10

Scheme 11

COMMUNICATION TABLE

Scheme 12

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 an obstacle as well as their positions by indicating them on the multi-information display (in the accessory meter assembly) and by sounding a buzzer.
2. FUNCTION OF COMPONENTS Component Function No. 1 Ultrasonic Sensor (6) Detects the distance between the vehicle and an obstacle No. 1 Clearance Warning Buzzer Sounds to inform the driver according to the distance to an obstacle Multi-information Display on Accessory 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 Combination Meter Assembly Transmits the vehicle speed signal to the clearance warning ECU assembly Back Sonar or Clearance Sonar Switch Assembly Operating this switch enables, disables or cuts off the operation of the intuitive parking assist system Clearance Warning ECU Assembly 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 Sounds the buzzer Main Body ECU (Driver Side Junction Block Assembly) Transmits the destination information to the clearance warning ECU assembly ECM Transmits the shift position signal to the clearance warning ECU assembly Air Conditioning Amplifier Assembly Transmits the temperature information to the clearance warning ECU assembly
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). Clearance sonar main switch is on. Shift lever is in any position other than P. Vehicle speed is less than approximately 9 km/h (5.6 mph). The sensors stop operating when the vehicle speed exceeds approximately 13 km/h (8.1 mph), and start operating when the vehicle speed drops below approximately 9 km/h (5.6 mph). Rear Corner Sensor Engine switch is on (IG). Clearance sonar main switch is on. Shift lever is in R. Rear Center Sensor Engine switch is on (IG). Clearance sonar main switch is on. Shift lever is in R. When the system operates, the clearance warning ECU assembly 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 assembly. Based on this information, the clearance warning ECU assembly sends signals to the multi-information display and the clearance warning buzzer. The approximate distance between the vehicle and the obstacle is then indicated, and the buzzer sounds. HINT: Refer to Detection Range Measurement and Display Inspection. Refer to OPERATION CHECK [08/2013 - ] .
4. COMMUNICATION SIGNALS OF COMPONENTS HINT: Allocation refers to the process of the clearance warning ECU assembly 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". 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 clearance sonar main switch is on), the clearance warning ECU assembly provides power to the first sensors in each series (front left sensor and rear left sensor). After the power is supplied, the front left sensor and rear left 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 left 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 left 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 right 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 assembly sends information request signals and sensor activation signals to the ultrasonic sensors and receives detection result signals from the sensors. 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 [08/2013 - ]

1. CUSTOMIZE INTUITIVE PARKING ASSIST SYSTEM Customizing with the 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 clearance sonar main switch on. Turn the Techstream on. Enter the following menus: Body Electrical / Intuitive P/A / Utility / Customize. Select the setting by referring to the table below. WARNING Display Default Content Setting Relevant ECU Rr Sensor Onset Range Wide Sets the buzzer activation range for the rear center sensors. Narrow or Wide Narrow: 600 mm (23.6 in.) Wide: 1000 mm (39.4 in.) (Pole) Wide: 1500 mm (59.1 in.) (Wall) Clearance warning ECU assembly Keep Sense Buzzer Avail Sounds the buzzer 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 Clearance warning ECU assembly Fr & Rr Buzzer Volume M2 Changes 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 Clearance warning ECU assembly SENSOR Display Default Content Setting Relevant ECU Sensor Condition N Avail Makes the front sensors available when the shift lever is in N. Not Avail or Avail Not Avail: Not Available Avail: Available Clearance warning ECU assembly Reverse Range Front Sensor F Changes 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 Clearance warning ECU assembly Non P/R Range Rear Sensor R Stop Changes the operation setting for the rear sensors when the shift lever is in any position other than 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 Clearance warning ECU assembly