Millimeter Wave Radar Sensor Power Source Circuit: Procedure
- CHECK DISTANCE CONTROL ECU (IGB VOLTAGE)
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- Disconnect the B9 sensor connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Switch Condition Specified Condition B9-5 (IGB) - Body ground Engine switch on (IG) 11 to 14 V
NG → See step 3
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR - ECM AND BODY GROUND)
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- Disconnect the millimeter wave radar sensor connector.
- Disconnect the A5 connector from the ECM.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A5-16 (LGND) - B9-1 (LGND) Always Below 1 Ω B9-1 (LGND) - Body ground Always 10 kΩ or higher B9-2 (SGND) - Body ground Always Below 1 Ω
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 5
- CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR - DISTANCE CONTROL ECU)
- Disconnect the millimeter wave radar sensor and distance control ECU connectors.
- Measure the resistance according to the value(s) in the table below
Standard Resistance
Tester Connection Condition Specified Condition B9-5 (IGB) - J17-13 (IGB) Always Below 1 Ω J17-13 (IGB) - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 4
- REPLACE DISTANCE CONTROL ECU. Refer to COMPONENTS
- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE