Millimeter Wave Radar Sensor Power Source Circuit: Procedure

CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY (IGB VOLTAGE)

Fig 1: Identifying Millimeter Wave Radar Sensor Assembly (IGB Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Voltage

Tester Connection	Condition	Specified Condition
A2-5 (IGB) - A2-2 (SGND)	Power switch on (IG)	10 to 14 V

TEXT IN ILLUSTRATION

*1	Front view of wire harness connector (to Millimeter Wave Radar Sensor Assembly)

NG → See step 2

OK → See step 3

CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - BODY GROUND)

Disconnect the millimeter wave radar sensor assembly connector.

Fig 2: Identifying A2 Millimeter Wave Radar Sensor Assembly (Body Ground) Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
A2-2 (SGND) - Body ground	Always	Below 1 Ω

TEXT IN ILLUSTRATION

*1	Front view of wire harness connector (to Millimeter Wave Radar Sensor Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - BODY GROUND)

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - IG1 NO. 1 RELAY)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE