FRONT RADAR SENSOR INSPECTION

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1.  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)])

2.  Remove the front radar sensor. (See FRONT RADAR SENSOR REMOVAL/INSTALLATION.)

3.  Connect the front radar sensor connector.

4.  Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)])

5.  Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (reference).

•  If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s) and related wiring harnesses.

―  If the system does not operate normally even though the inspection items are normal, replace the front radar sensor. (See FRONT RADAR SENSOR REMOVAL/INSTALLATION.)

Terminal Voltage Table (Reference)

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Terminal	Signal name	Connected to	Measurement conditions		Voltage (V)	Inspection item(s)
A	Ground	GND point	Under any condition		Approx. 0	•  GND point •  Related wiring harness
B	—	—	—		—	—
C	CAN_L	CAN system related module	Because this terminal is for communication, determination using terminal voltage inspection is not possible.
D	—	—	—		—	—
E	CAN_H	CAN system related module	Because this terminal is for communication, determination using terminal voltage inspection is not possible.
F	—	—	—		—	—
G	—	—	—		—	—
H	Power position (IG1)	IG1 relay	Ignition switched ON (engine off or on)		B+	•  IG1 relay •  Related wiring harness
			Ignition switched off or ACC		1.0 or less