DIAGNOSIS SYSTEM
DESCRIPTION
The main body ECU (multiplex network body ECU) and certification ECU (smart key ECU assembly) control the LIN communication system. LIN communication system data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3).
When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.
CHECK DLC3
(a) Check the DLC3.
Click here
INSPECT BATTERY VOLTAGE
(a) Measure the battery voltage.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery.
How To Proceed With Troubleshooting
Terminals Of EcuLexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Dynamic Radar Cruise Control System: Road Test
ROAD TEST HINT:
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Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Air Conditioning System: System Diagram
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