Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000018WQT
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: TERMINALS OF ECU; 2018 - 2020 MY Sienna [11/2017 -        ]

TERMINALS OF ECU

1. CHECK DRIVING SUPPORT ECU ASSEMBLY

NOTICE:

Do not apply excessive force to the connector. If a force of 10 kg or more is applied, the connector may be broken.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A80-3 (BZ) - A80-28 (GND)

G - BR

Skid control buzzer output

Ignition switch ON, buzzer not sounding

11 to 14 V

Ignition switch ON, buzzer sounding

Below 1 V

A80-7 (B) - A80-28 (GND)

L - BR

Power source

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

A80-8 (CA1P) - A80-28 (GND)

V - BR

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 1)

A80-9 (CA1N) - A80-28 (GND)

W - BR

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 2)

A80-10 (CA2H) - A80-28 (GND)

R - BR

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 1)

A80-11 (CA2L) - A80-28 (GND)

W - BR

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 2)

A80-23 (SPSW) - A80-28 (GND)

W - BR

Steering pad switch assembly signal (distance control signal)

Ignition switch ON, steering pad switch assembly (vehicle-to-vehicle distance control switch) off

4.75 to 5.25 V

Ignition switch ON, steering pad switch assembly (vehicle-to-vehicle distance control switch) on

Below 1 V

A80-28 (GND) - Body ground

BR - Body ground

Ground

Always

Below 1 Ω

(a) Waveform 1

(1) CAN communication signal

Item

Content

Tester Connection
  • Between A80-8 (CA1P) and A80-28 (GND)
  • Between A80-10 (CA2H) and A80-28 (GND)

Tool Setting

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

(b) Waveform 2

(1) CAN communication signal

Item

Content

Tester Connection
  • Between A80-9 (CA1N) and A80-28 (GND)
  • Between A80-11 (CA2L) and A80-28 (GND)

Tool Setting

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

2. CHECK ECM

HINT:

The standard voltage, resistance and waveform between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals is also indicated. The result of checks should be compared with the standard voltage, resistance and waveform for each pair of the terminals as displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.

Terminal No. (Symbols)

Wiring Color

Terminal Description

Condition

Specified Condition

B67-139 (D) - B67-53 (E1)

R - BR

D shift position signal

Ignition switch ON, shift lever in D

11 to 14 V

Ignition switch ON, shift lever not in D

Below 1 V

A69-17 (S) - B67-53 (E1)

W - BR

S shift position signal

Ignition switch ON, shift lever in S

11 to 14 V

Ignition switch ON, shift lever not in S

Below 1 V

A69-27 (STP) - B67-53 (E1)

L - BR

Stop light switch assembly signal

Brake pedal depressed

11 to 14 V

Brake pedal released

Below 1 V

A69-41 (CCS) - B67-53 (E1)

B - BR

Cruise control main switch circuit

Cruise control main switch (ON-OFF button) not pushed

1 MΩ or higher

Cruise control main switch (ON-OFF button) pushed

Below 2.5 Ω

+RES switch ON

235 to 245 Ω

-SET switch ON

617 to 643 Ω

CANCEL switch ON

1509 to 1571 Ω

A69-36 (ST1-) - B67-53 (E1)

LG - BR

Stop light switch assembly signal

Ignition switch ON, brake pedal depressed

Below 1 V

Ignition switch ON, brake pedal released

11 to 14 V

A69-37 (SFTD) - B67-53 (E1)

V - BR

Down-shift position switch signal

Ignition switch ON, shift lever in S

11 to 14 V

Ignition switch ON, shift lever in "-"

Below 1 V

A69-38 (SFTU) - B67-53 (E1)

L - BR

Up-shift position switch signal

Ignition switch ON, shift lever in S

11 to 14 V

Ignition switch ON, shift lever in "+"

Below 1 V

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A77-1 (SGND) - Body ground

BR - Body ground

Ground

Always

Below 1 Ω

A77-2 (CA2L) - A77-1 (SGND)

W - BR

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 2)

A77-3 (CA2H) - A77-1 (SGND)

GR - BR

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 1)

A77-5 (CA1P) - A77-1 (SGND)

R - BR

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 1)

A77-6 (CA1N) - A77-1 (SGND)

W - BR

CAN communication signal

Ignition switch ON

Pulse generation

(See waveform 2)

A77-8 (IGB) - A77-1 (SGND)

L - BR

Power source

Ignition switch ON

11 to 14 V

3. CHECK MILLIMETER WAVE RADAR SENSOR

(a) Waveform 1

(1) CAN communication signal

Item

Content

Tester Connection
  • Between A77-3 (CA2H) and A77-1 (SGND)
  • Between A77-5 (CA1P) and A77-1 (SGND)

Tool Setting

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

(b) Waveform 2

(1) CAN communication signal

Item

Content

Tester Connection
  • Between A77-2 (CA2L) and A77-1 (SGND)
  • Between A77-6 (CA1N) and A77-1 (SGND)

Tool Setting

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.