Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Calibration
CALIBRATION
TORQUE SENSOR ZERO POINT CALIBRATION (USING TECHSTREAM)
NOTICE:
Perform torque sensor zero point calibration if any of the following conditions occur:
- The power steering ECU assembly has been replaced.
- The electric power steering column sub-assembly has been replaced.
- There is a difference in steering effort between turning left and right.
(a) Perform inspection before calibration.
(1) Turn the engine switch off.
(2) Connect the Techstream to the DLC3.
(3) Turn the engine switch on (IG).
(4) Turn the Techstream on.
(5) Calibrate the power steering ECU assembly. Enter the following menus: Chassis / EMPS / Data List.
(6) Check the values by referring to the table below.
Chassis > EMPS > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| IG Power Supply | IG power source voltage | Min.: 0.0000 V Max.: 20.1531 V | 8 to 16 V | Engine switch on (IG) |
| Tester Display |
|---|
| IG Power Supply |
Standard Voltage:
8 to 16 V
NOTICE:
If the IG power supply voltage is 8 V or less, calibration cannot be performed. In this case, charge or replace the battery, and then perform calibration.
(b) Perform torque sensor zero point calibration.
NOTICE:
If DTC C1516 (Torque Sensor Zero Point Adjustment Incomplete) is stored, the torque sensor zero point cannot be calibrated. Clear the DTCs before starting calibration.
(1) Align the front wheels straight ahead and center the steering wheel.
(2) Turn the engine switch off.
(3) Connect the Techstream to the DLC3.
(4) Turn the engine switch on (IG).
(5) Turn the Techstream on.
(6) Enter the following menus: Chassis / EMPS / Utility / Torque Sensor Adjustment.
Chassis > EMPS > Utility| Tester Display |
|---|
| Torque Sensor Adjustment |
NOTICE:
- Do not turn the steering wheel sharply.
- During the torque sensor zero point calibration the steering wheel will shudder. Do not touch the steering wheel until at least 3 seconds have elapsed after the shuddering has stopped.
(7) Check for DTCs.
Click here .gif)
NOTICE:
If DTC C1515, C1516, C1534 or C1581 is output, perform troubleshooting for the corresponding DTC.
| Result | See Procedure |
|---|---|
| DTC C1515 is output. | |
| DTC C1516 is output. | |
| DTC C1534 is output. | |
| DTC C1581 is output. | |
ASSIST MAP WRITING (USING TECHSTREAM)
NOTICE:
Perform assist map writing if the following condition occurs:
The power steering ECU assembly has been replaced.
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / EMPS / Utility / Signal Check.
Chassis > EMPS > Utility| Tester Display |
|---|
| Signal Check |
HINT:
- Follow the instructions on the Techstream to perform Signal Check.
- With DTC C1581 output, performing Signal Check will cause the power steering ECU assembly to enter Signal Check and the assist map will be written automatically.
(f) Wait for at least 5 seconds.
(g) Check for DTCs.
Click here
HINT:
After writing the assist map, if DTC C1581 is output, perform the troubleshooting procedure for DTC C1581.
Click here
Assist Map Number Mismatch (C1582)
DESCRIPTION When an incorrect ECM, main body ECU (multiplex network body ECU) or skid control ECU (brake actuator assembly) is installed after the assist map has been written to the power steering ECU ...
Customize Parameters
CUSTOMIZE PARAMETERS DRIVE MODE CUSTOMIZATION "CUSTOMIZE" settings can be changed on the screen of the multi-display. HINT: "CUSTOMIZE" mode can be selected by using the drive mode select switch (comb ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Panoramic View Monitor System: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE:
The following inspection procedure of the panoramic view monitor system is described on the assumption that the navigation system*1 or audio and visual system*2 is normal. If the navigation system has any malfunction, first proceed with troubleshooting of the naviga ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Navigation System: Vehicle Speed Signal Circuit between Stereo Component Amplifier and Combination Meter
DESCRIPTION The stereo component amplifier assembly receives a vehicle speed signal from the combination meter assembly to control the ASL function. HINT:
A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
0.0118