Laser Sensor Power Source Circuit: Wiring Diagram
WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK CRUISE CONTROL ECU ASSY (IGB VOLTAGE)
- Disconnect the L1 sensor connector.
- Measure the voltage of the wire harness side connector.
Standard voltage
TESTER CONNECTION AND SPECIFIED CONDITIONTester Connection Condition Specified Condition L1-5 (IGB) - Body ground Ignition switch on 10 to 16 V
NG : Go to step 3
OK : GO TO NEXT STEP
- CHECK WIRE HARNESS (LASER RADAR SENSOR - HYBRID CONTROL ECU AND BODY GROUND)
- Disconnect the L1 sensor connector.
- Disconnect the H29 hybrid vehicle control ECU connector.
- Measure the resistance of the wire harness side connectors.
Standard resistance
TESTER CONNECTION AND SPECIFIED CONDITIONTester Connection Specified Condition H29-11 (LGND) - L1-1 (LGND) Below 1 Ω H29-11 (LGND) - Body ground 10 kΩ or higher L1-2 (SGND) - Body ground Below 1 Ω
NG : REPAIR OR REPLACE HARNESS OR CONNECTOR
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
- CHECK WIRE HARNESS (LASER RADAR SENSOR - DISTANCE CONTROL ECU)
- Disconnect the L1 sensor connector.
- Disconnect the D2 ECU connector.
- Measure the resistance of the wire harness side connectors.
Standard resistance
TESTER CONNECTION AND SPECIFIED CONDITIONTester Connection Specified Condition L1-5 (IGB) - D2-13 (IGB) Below 1 Ω D2-13 (IGB) - Body ground 10 kΩ or higher
NG : REPAIR OR REPLACE HARNESS OR CONNECTOR
OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE