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

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Toyota CH-R Service Manual: Terminals Of Ecu

Problem Symptoms Table

Diagnosis System

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