Lexus IS250 IS220d GSE20 ALE20 - STEERING COLUMN
POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM - DIAGNOSIS SYSTEM
| DESCRIPTION |
When troubleshooting a vehicle with the diagnostic system, the only difference from the usual troubleshooting procedure is connecting the intelligent tester to the vehicle and reading various data output from the vehicle's multiplex tilt & telescopic ECU.
The multiplex tilt & telescopic ECU records DTCs when the ECU detects a malfunction in the computer itself or in its circuits.
To check the DTCs, connect the intelligent tester to the DLC3 on the vehicle. The intelligent tester enables you to erase the DTCs, activate several actuators, and check the freeze frame data and various forms of steering data.
| DLC3 CHECK |
Check the DLC3.
The multiplex tilt & telescopic ECU uses CAN and ISO 15765-04 for its communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-03 and matches the ISO 15765-04 format.
| Symbols (Terminal No.) | Terminal Description | Condition | Specified Condition |
| SIL (7) - SG (5) | Bus "+" line | During communication | Pulse generation |
| CG (4) - Body ground | Chassis ground | Always | Below 1 Ω |
| SG (5) - Body ground | Signal ground | Always | Below 1 Ω |
| BAT (16) - Body ground | Battery positive | Always | 11 to 14 V |
| CANH (6) - CANL (14) | HIGH-level CAN bus line | Engine switch off | 54 to 67 Ω |
| CANH (6) - Battery positive | HIGH-level CAN bus line | Engine switch off | 1 MΩ or higher |
| CANH (6) - CG (4) | HIGH-level CAN bus line | Engine switch off | 3 kΩ or higher |
| CANL (14) - Battery positive | LOW-level CAN bus line | Engine switch off | 1 MΩ or higher |
| CANL (14) - CG (4) | LOW-level CAN bus line | Engine switch off | 3 kΩ or higher |
- HINT:
- If the display shows a communication error message after connecting the intelligent testercable to the DLC3 and turning the engine switch on (IG), there is a problem either with the vehicle or the tester.