Inspection Procedure
WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT LASER SENSOR
- Disconnect the laser sensor connector.
- Measure the voltage according to the value (s) in the table below.
Standard:
TESTER CONNECTION CHARTTester connection Condition Specified value L1-5 (IGB) - Body ground Ignition SW ON 10 to 14 V
- NG: Go to step 3 .
- OK: Go to next step.
- CHECK WIRE HARNESS AND CONNECTOR
- Disconnect the ECM E3 connector.
- Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION CHARTTester connection Condition Specified value L1-1 (LGND) - E3-29 (LGND) Always Below 1Ω L1-1 (LGND) - Body ground Always 10 kΩ or higher L1-2 (SGND) - Body ground Always Below 1 Ω Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
- OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
- CHECK WIRE HARNESS AND CONNECTOR (LASER SENSOR - DISTANCE CONTROL ECU)
- Disconnect the cruise control ECU (distance control ECU) connector.
- Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION CHARTTester connection Condition Specified value D2-13 (IGB) - L1-5 (IGB) Always Below 1 Ω D2-13 (IGB) - Body ground Always 10 kΩ or higher Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR
- OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )