GENERAL INFORMATION
HINT:
*: The Techstream is the name for the diagnostic tester in North America.
TROUBLESHOOTING PROCEDURES
Procedure Type | Details | Troubleshooting Method |
---|---|---|
DTC Based Diagnosis | The diagnostic procedure is based on the DTC that is stored. | The malfunctioning part is identified based on the DTC detection conditions using a process of elimination. The possible trouble areas are eliminated one-by-one using the Techstream and inspection of related parts. |
Symptom Based Diagnosis (No DTCs stored) | The diagnostic procedure is based on problem symptoms. | The malfunctioning part is identified based on the problem symptoms using a process of elimination. The possible trouble areas are eliminated one-by-one using the Techstream and inspection of related parts. |
DESCRIPTION
(a) The data of each system and Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.
CHECK DLC3
(a) The vehicle ECUs use ISO 15765-4 communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.
Symbol | Terminal No. | Name | Reference Terminal | Result | Condition |
---|---|---|---|---|---|
SIL | 7 | Bus "+" line | 5 - Signal ground | Pulse generation | During transmission |
CG | 4 | Chassis ground | Body ground | 1 Ω or less | Always |
SG | 5 | Signal ground | Body ground | 1 Ω or less | Always |
BAT | 16 | Battery positive | Body ground | 11 to 14 V | Always |
CANH | 6 | CAN "High" line | 14 - CANL | 54 to 69 Ω | Engine switch off* |
Battery positive | 6 kΩ or higher | Engine switch off* | |||
4 - CG | 200 Ω or higher | Engine switch off* | |||
CANL | 14 | CAN "Low" line | Battery positive | 6 kΩ or higher | Engine switch off* |
4 - CG | 200 Ω or higher | Engine switch off* |
NOTICE:
*: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the engine switch, any other switches or the doors.
If the result is not as specified, the DLC3 may be malfunctioning. Repair or replace the harness or connector.
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Automatic Transaxle System: Shift Solenoid "A" Circuit Short to Ground (P075011)
DESCRIPTION Changing gears is performed by the ECM turning the shift solenoid valves SL1, SL2, SL3, SL4, SL5, S1 and S2 on and off. If an open or short occurs in any of the shift solenoid valve circuits, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be driven. I ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Can Communication System: Restraints Occupant Classification System Module Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Restraints Occupant Classification System Module Communication Stop Mode Either condition is met:
"Occupant Detection" is not displayed on the CAN Bus Check screen of the Techstream.
Click here
Communication system DTCs (DTCs tha ...