Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJ9Q
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: TERMINALS OF ECU; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

TERMINALS OF ECU

1. CHECK CLEARANCE WARNING ECU

(a) Disconnect the D77 clearance warning ECU connector.

(b) Measure the voltage and resistance according to value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

D77-15 (IG) - D77-17 (E)

L - W-B

IG power source signal

Ignition switch ON

11 to 14 V

D77-15 (IG) - D77-17 (E)

L - W-B

IG power source signal

Ignition switch off

Below 1 V

D77-12 (CSSW) - D77-17 (E)

SB - W-B

Clearance sonar main switch power source signal

Ignition switch ON,

clearance sonar main switch on

11 to 14 V

D77-12 (CSSW) - D77-17 (E)

SB - W-B

Clearance sonar main switch power source signal

Ignition switch ON,

clearance sonar main switch off

Below 1 V

D77-17 (E) - Body ground

W-B - Body ground

ECU ground

Always

Below 1 Ω

(c) Reconnect the D77 clearance warning ECU connector.

(d) Measure the voltage and waveform according to value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

D77-10 (BBZ) - D77-11 (EF)

W - B

No. 1 clearance warning buzzer signal

Buzzer not sounding

Below 1 V

D77-10 (BBZ) - D77-11 (EF)

W - B

No. 1 clearance warning buzzer signal

Buzzer sounding

Waveform 1

D77-21 (BOF) - D77-19 (E1)

B - R

No. 1 ultrasonic sensor (front sensor) circuit power source

Ignition switch ON, clearance sonar main switch on

7.2 to 8.8 V

D77-21 (BOF) - D77-19 (E1)

B - R

No. 1 ultrasonic sensor (front sensor) circuit power source

Ignition switch off

Below 1 V

D77-9 (SOF) - D77-19 (E1)

G - R

No. 1 ultrasonic sensor (front sensor) communication signal

Ignition switch ON, clearance sonar main switch on

Waveform 2

D77-7 (BOR) - D77-18 (E2)

B - W

No. 1 ultrasonic sensor (rear sensor and rear center sensor) circuit power source

Ignition switch ON, clearance sonar main switch on

7.2 to 8.8 V

D77-7 (BOR) - D77-18 (E2)

B - W

No. 1 ultrasonic sensor (rear sensor and rear center sensor) circuit power source

Ignition switch off

Below 1 V

D77-24 (SOR) - D77-18 (E2)

G - W

No. 1 ultrasonic sensor (rear sensor and rear center sensor) communication signal

Ignition switch ON, clearance sonar main switch on

Waveform 2

(e) Using an oscilloscope, check waveform 1.

Waveform 1 (Reference)

Item

Content

Terminal No. (Symbol)

D77-10 (BBZ) - D77-11 (EF)

Tool Setting

5 V/DIV., 1 msec./DIV.

Condition

Buzzer sounding

NOTICE:

The waveform amplitude varies depending on the volume setting.

(f) Using an oscilloscope, check waveform 2.

Waveform 2 (Reference)

Item

Content

Terminal No. (Symbol)
  • CH: 1 D77-9 (SOF) - D77-19 (E1)
  • CH: 2 D77-24 (SOR) - D77-18 (E2)

Tool Setting

2 V/DIV., 1 msec./DIV.

Condition

Ignition switch ON, clearance sonar main switch on