Toyota CH-R Service Manual: Terminals Of Ecu

Toyota CH-R Service Manual / Pre-collision / Pre-collision System / Terminals Of Ecu

TERMINALS OF ECU

CHECK MILLIMETER WAVE RADAR SENSOR

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

HINT:

If the result is not as specified, there may be a malfunction on the wire harness side.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A2-8 (IGB) - A2-1 (SGND)	B - W-B	Power source	Ignition switch ON	11 to 14 V
A2-1 (SGND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

(b) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A2-3 (CA2H) - A2-1 (SGND)	G - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
A2-2 (CA2L) - A2-1 (SGND)	GR - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 2)
A2-5 (CA1P) - A2-1 (SGND)	G - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
A2-6 (CA1N) - A2-1 (SGND)	R - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 2)

(1) CAN communication signal

Item	Content
Terminal Name	Between A2-3 (CA2H) and A2-1 (SGND) Between A2-5 (CA1P) and A2-1 (SGND)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Ignition switch ON

Item

Content

Terminal Name

Between A2-3 (CA2H) and A2-1 (SGND)

Between A2-5 (CA1P) and A2-1 (SGND)

Tester Range

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

(d) WAVEFORM 2

(1) CAN communication signal

Item	Content
Terminal Name	Between A2-2 (CA2L) and A2-1 (SGND) Between A2-6 (CA1N) and A2-1 (SGND)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Ignition switch ON

Item

Content

Terminal Name

Between A2-2 (CA2L) and A2-1 (SGND)

Between A2-6 (CA1N) and A2-1 (SGND)

Tester Range

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

CHECK FORWARD RECOGNITION CAMERA

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

HINT:

If the result is not as specified, there may be a malfunction on the wire harness side.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
R5-8 (BZ) - R5-10 (GND)	B - W-B	Pre-collision city buzzer	Ignition switch ON, pre-collision city buzzer not operating	11 to 14 V
R5-8 (BZ) - R5-10 (GND)	B - W-B	Pre-collision city buzzer	Ignition switch ON, pre-collision city buzzer operating	0 to 1.5 V
R5-3 (LKSW) - R5-10 (GND)	R - W-B	Pre-collision system cancel switch assembly	Pre-collision system cancel switch assembly being pressed	Below 1 Ω
R5-3 (LKSW) - R5-10 (GND)	R - W-B	Pre-collision system cancel switch assembly	Pre-collision system cancel switch assembly not being pressed	100 kΩ or higher
R5-7 (IGB) - R5-10 (GND)	B - W-B	Power source	Ignition switch ON	11 to 14 V
R5-7 (IGB) - R5-10 (GND)	B - W-B	Power source	Ignition switch off	Below 1 V
R5-10 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

(b) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
R5-5 (CA1P) - R5-10 (GND)	R - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
R5-6 (CANH) - R5-10 (GND)	G - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 1)
R5-11 (CA1N) - R5-10 (GND)	GR - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 2)
R5-12 (CANL) - R5-10 (GND)	R - W-B	CAN communication signal	Ignition switch ON	Pulse generation (See waveform 2)

(1) CAN communication signal

Item	Content
Terminal Name	Between R5-5 (CA1P) - R5-10 (GND) Between R5-6 (CANH) - R5-10 (GND)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Ignition switch ON

Item

Content

Terminal Name

Between R5-5 (CA1P) - R5-10 (GND)

Between R5-6 (CANH) - R5-10 (GND)

Tester Range

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

(d) WAVEFORM 2

(1) CAN communication signal

Item	Content
Terminal Name	Between R5-11 (CA1N) - R5-10 (GND) Between R5-12 (CANL) - R5-10 (GND)
Tester Range	1 V/DIV., 10 μsec./DIV.
Condition	Ignition switch ON

Item

Content

Terminal Name

Between R5-11 (CA1N) - R5-10 (GND)

Between R5-12 (CANL) - R5-10 (GND)

Tester Range

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Diagnosis System

DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here FUNCTION OF WARNING INDICATOR AND MESSAGE (a) If the pre-collision system is not functioning properly, the driver is warned by the P ...

Other materials:

Toyota CH-R Service Manual > Outer Mirror Switch: Installation
INSTALLATION PROCEDURE 1. INSTALL OUTER MIRROR SWITCH ASSEMBLY (a) Engage the claws to install the outer mirror switch assembly. 2. INSTALL MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WITH FRONT ARMREST BASE UPPER PANEL Click here ...

Toyota CH-R Service Manual > Vehicle Stability Control System: NE Signal (C1224)
DESCRIPTION The skid control ECU (brake actuator assembly) receives engine speed signals from the ECM via CAN communication. DTC No. Detection Item DTC Detection Condition Trouble Area C1224 NE Signal The vehicle ...

Toyota CH-R Service Manual: Terminals Of Ecu

Problem Symptoms Table

Diagnosis System

Other materials:

Toyota C-HR (AX20) 2023-2026 Owner's Manual

Toyota CH-R Owners Manual

Toyota CH-R Service Manual