Last Modified: 11-29-2007 1.6 U
Service Category: Engine/Hybrid System Section: Cruise Control
Model Year: 2008 Model: Sequoia Doc ID: RM000000V0E011X
Title: CRUISE CONTROL: DYNAMIC LASER CRUISE CONTROL SYSTEM: TERMINALS OF ECU (2008 Sequoia)

TERMINALS OF ECU

1. CHECK DISTANCE CONTROL ECU



Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A43-1 (B) - A43-12 (GND)

O - BR

Battery

Ignition switch ON

11 to 14 V

A43-8 (CANH) - A43-12 (GND)

O - BR

CAN communication signal

CAN communication circuit

Pulse generation

A43-9 (CANL) - A43-12 (GND)

W - BR

CAN communication signal

CAN communication circuit

Pulse generation

A43-10 (SGND) - Body ground

BR - Body ground

Ground

Always

Below 1 Ω

A43-12 (GND) - Body ground

BR - Body ground

Ground

Always

Below 1 Ω

A43-13 (IGB) - A43-12 (GND)

L - BR

Ignition switch ON signal

Ignition switch off

Below 1 V

A43-13 (IGB) - A43-12 (GND)

L - BR

Ignition switch ON signal

Ignition switch ON

11 to 14 V

A43-22 (LRDD) - A43-10 (SGND)

V - BR

Laser radar sensor input signal

Ignition switch ON

Pulse generation

(see waveform 1)

A43-23 (LRRD) - A43-10 (SGND)

P - BR

Laser radar sensor output signal

Ignition switch ON

Pulse generation

(see waveform 2)

A43-16 (MODE) - A43-12 (GND)

P - BR

Steering pad switch signal (Distance control switch signal)

Ignition switch ON, Steering pad switch signal ON

Below 2 V

A43-16 (MODE) - A43-12 (GND)

P - BR

Steering pad switch signal (Distance control switch signal)

Ignition switch ON, Steering pad switch signal OFF

11 to 14 V

(a) Using an oscilloscope, check waveform 1.

Waveform 1

Item

Content

Terminal No. (Symbol)

A43-22 (LRDD) - A43-10 (SGND)

Tool Setting

2 V/DIV., 10 msec./DIV.

Condition

Ignition switch ON

(b) Using an oscilloscope, check waveform 2.

Waveform 2

Item

Content

Terminal No. (Symbol)

A43-23 (LRRD) - A43-10 (SGND)

Tool Setting

2 V/DIV., 5 msec./DIV.

Condition

Ignition switch ON

2. CHECK ECM



Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A27-26 (STP) - D56-81 (E1)

G-W - BR

Stop light signal

Brake pedal released (Stop light switch off)

Below 1 V

A27-26 (STP) - D56-1 (E1)

G-W - BR

Stop light signal

Brake pedal depressed (Stop light switch on)

11 to 14 V

A27-35 (ST1-) - D56-81 (E1)

R - BR

Stop light signal

Ignition switch ON, Brake pedal depressed (Stop light switch on)

Below 1 V

A27-35 (ST1-) - D56-81 (E1)

R - BR

Stop light signal

Ignition switch ON, Brake pedal released (Stop light switch off)

11 to 14 V

A27-16 (TC) - D56-81 (E1)

R - BR

Terminal TC of DLC3

Ignition switch ON

11 to 14 V

A27-16 (TC) - D56-81 (E1)

R - BR

Terminal TC of DLC3

Connect terminals TC and CG of DLC3

Below 1 V

A27-44 (LGND) - Body ground

GR - Body ground

Ground

Always

Below 1 Ω

A27-45 (CCS) - D56-81 (E1)

BR - BR

Cruise control main switch signal

Ignition switch ON

11 to 14 V

A27-45 (CCS) - D56-81 (E1)

BR - BR

Cruise control main switch signal

CANCEL switch on

6.6 to 10.1 V

A27-45 (CCS) - D56-81 (E1)

BR - BR

Cruise control main switch signal

- (COAST)/SET switch on

4.5 to 7.1 V

A27-45 (CCS) - D56-81 (E1)

BR - BR

Cruise control main switch signal

+ (ACCEL)/RES (RESUME) switch on

2.3 to 4.0 V

A27-45 (CCS) - D56-81 (E1)

BR - BR

Cruise control main switch signal

Main switch on

Below 1 V

A27-37 (CCHG) - D56-81 (E1)

L - BR

Distance control switch signal

Ignition switch ON, Cruise control main switch on, MODE switch on

Below 1 V

A27-37 (CCHG) - D56-81 (E1)

L - BR

Distance control switch signal

Ignition switch ON, Cruise control main switch on, MODE switch off

11 to 14 V

D56-81 (E1) - Body ground

BR - Body ground

Ground

Always

Below 1 Ω

3. CHECK LASER RADAR SENSOR



Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A26-1 (LGND) - Body ground

GR - Body ground

Ground (Distance signal)

Always

Below 1 Ω

A26-2 (SGND) - Body ground

BR - Body ground

Ground

Always

Below 1 Ω

A26-3 (LRDD) - A26-2 (SGND)

V - BR

Laser radar sensor output signal

Ignition switch ON

Pulse generation

(see waveform 1)

A26-4 (LRRD) - A26-2 (SGND)

P - BR

Laser radar sensor input signal

Ignition switch ON

Pulse generation

(see waveform 2)

A26-5 (IGB) - A26-2 (SGND)

L - BR

Power source

Ignition switch ON

11 to 14 V

(a) Using an oscilloscope, check waveform 1.

Waveform 1

Item

Content

Terminal No. (Symbol)

A26-3 (LRDD) - A26-2 (SGND)

Tool Setting

2 V/DIV., 10 msec./DIV.

Condition

Ignition switch ON

(b) Using an oscilloscope, check waveform 2.

Waveform 2

Item

Content

Terminal No. (Symbol)

A26-4 (LRRD) - A26-2 (SGND)

Tool Setting

2 V/DIV., 5 msec./DIV.

Condition

Ignition switch ON

4. BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)



Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A19-8 (BZ) - Body ground

Y - Body ground

Skid control buzzer circuit

Ignition switch ON

Skid control buzzer is sounded

Below 1 V ←→ 11 to 14 V

Ignition switch ON

Skid control buzzer is not sounded

11 to 14 V

A19-2 (STPO) - Body ground

BR - Body ground

Stop light control relay output signal

Ignition switch ON

11 to 14 V

A19-11 (STP2) - Body ground

GR - Body ground

Stop light control relay input signal

Brake pedal released

(Stop light switch OFF)

Below 1.0 V

Brake pedal depressed

(Stop light switch ON)

11 to 14 V

A19-41 (STP) - Body ground

Y - Body ground

Stop light switch input signal

Brake pedal released

(Stop light switch OFF)

Below 1.0 V

Brake pedal depressed

(Stop light switch ON)

11 to 14 V