Toyota Tundra. Manual — part 589

Fig. 2: Identifying Intuitive Parking Assist System Replacement Parts Location (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SYSTEM DIAGRAM

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Parking Assist/Monitoring - Tundra

Fig. 3: Intuitive Parking Assist System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SYSTEM DESCRIPTION

1. GENERAL

a. When the vehicle is driven at 10 km/h (6.2 mph) or less, the ultrasonic sensors detect any obstacles

at the corners and 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 accessory meter
and by sounding a buzzer.

2. FUNCTION OF COMPONENTS

COMPONENTS FUNCTION CHART

Components

Function

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Parking Assist/Monitoring - Tundra

3. OPERATION EXPLANATION

a. The clearance warning ECU determines whether the intuitive parking assist system should be

operated based on the clearance sonar main switch ON/OFF status, the shift position and the
vehicle speed.

b. When the system operates, the clearance warning ECU 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 as a signal to the clearance
warning ECU. Based on this information, the clearance warning ECU sends signals to the indicator
and the clearance warning buzzer. The approximate distance between the vehicle and the obstacle is
then indicated, and the buzzer sounds.

HINT:

Refer to "OPERATION CHECK" for the detailed operation.

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:

Use these procedures to troubleshoot the intuitive parking assist system.

1. VEHICLE BROUGHT TO WORKSHOP

2. INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

If the voltage is below 11V, recharge or replace the battery before proceeding.

Ultrasonic sensor

The ultrasonic sensor sends and receives ultrasonic waves. Based on the received
wave, the sensor calculates the approximate distance value between the vehicle and
the obstacle, and sends the distance value as a signal to the clearance warning ECU.

Accessory meter



Displays the location of the obstacle and the approximate distance between the
vehicle and the obstacle. Turns the intuitive parking assist system on and off.



Emits an intermittent sound to inform the driver that the ECU has detected an
obstacle within prescribed ranges.

Clearance sonar

main switch

Built into drive monitor switch. Output system ON/OFF signals to clearance warning
ECU.

Clearance

warning ECU

Receives signals from the ultrasonic sensors and sends the display signal and buzzer
signal to the accessory meter.

Combination

meter

Receives speed of each wheel via the skid control ECU, and then sends the signal to
the clearance warning ECU.

Park / Neutral

position switch

Sends a signal that activates the intuitive parking assist system when the shift lever is
moved to the R position.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Parking Assist/Monitoring - Tundra

3. PROBLEM SYMPTOMS TABLE

Result

PROBLEM SYMPTOMS RESULT CHART

B: Go to step 5

A: Go to next step

4. BASED ON MALFUNCTION SYMPTOM, PERFORM TROUBLESHOOTING BELOW

a. see OPERATION CHECK .

b. see TERMINALS OF ECU .

5. ADJUST, REPAIR OR REPLACE

6. CONFIRMATION TEST

NEXT: END

OPERATION CHECK

1. CHECK INITIAL CHECK FUNCTION

Fig. 4: LED And Buzzer Blinking Pattern
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Check the initial check function for the LED and buzzer.

1. When the clearance sonar main switch is turned ON, check that the following occurs: 1) after

Result

Proceed to

Fault is not listed in problem symptoms table

A

Fault is listed on problem symptoms table

B

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Parking Assist/Monitoring - Tundra