Millimeter Wave Radar Sensor Power Source Circuit: Wiring Diagram
- CHECK DISTANCE CONTROL ECU (IGB VOLTAGE)
- Disconnect the B9 sensor connector.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
TESTER CONNECTION AND SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition B9-5 (IGB) - Body ground Engine switch on (IG) 10 to 14 V NG : Go to step 3
OK : Go To Next Step
- CHECK WIRE HARNESS (MILLIMETER WAVE RADAR SENSOR - ECM AND BODY GROUND)
- Disconnect the B9 sensor connector.
- Disconnect the A5 ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION AND SPECIFIED CONDITION CHARTTester Connection Specified Condition A5-9 (LGND) - B9-1 (LGND) Below 1Ω B9-1 (LGND) - Body ground 10 kΩ or higher B9-2 (SGND) - Body ground Below 1Ω Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG : REPAIR OR REPLACE HARNESS OR CONNECTOR
OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
- CHECK WIRE HARNESS (MILLIMETER WAVE RADAR SENSOR - DISTANCE CONTROL ECU)
- Disconnect the B9 sensor connector.
- Disconnect the J17 ECU connector.
- Measure the resistance according to the value(s) in the table below
Standard resistance
TESTER CONNECTION AND SPECIFIED CONDITION CHARTTester Connection Specified Condition B9-5 (IGB) - J17-13 (IGB) Below 1Ω J17-13 (IGB) - Body ground 10 kΩ or higher NG : REPAIR OR REPLACE HARNESS OR CONNECTOR
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE