| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001C0WP |
| Model Year Start: 2019 | Model: GR Corolla | Prod Date Range: [06/2018 - 09/2019] |
| Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Hatchback)): CALIBRATION; 2019 - 2020 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2019] | ||
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 with motor 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 with motor assembly. Enter the following menus: Chassis / EMPS / Data List.
(6) Read the Data List according to the display on the Techstream.
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) |
Chassis > EMPS > Data List
|
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
![2019 - 2020 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Hatchback)): DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
Chassis > EMPS > Trouble Codes
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 with motor 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 with motor 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
Chassis > EMPS > Trouble Codes
HINT:
After writing the assist map, if DTC C1581 is output, perform the troubleshooting procedure for DTC C1581.
Click here
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