| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001H791 |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for HV Model): C151A17; Power Steering Torque Sensor "A" Supply Voltage Circuit Voltage Above Threshold; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
|
DTC |
C151A17 |
Power Steering Torque Sensor "A" Supply Voltage Circuit Voltage Above Threshold |
DESCRIPTION
The power steering ECU with motor assembly supplies a voltage of 5 V to the torque sensor (electric power steering column sub-assembly) and monitors the voltage value of the Hall IC inside the torque sensor (electric power steering column sub-assembly) which changes in response to changes in the magnetic flux density (steering torque) detected by the Hall IC, and calculates the assist torque.
While DTC C151A17 is detected, power assist is stopped due to fail-safe operation.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Warning Indicate |
Return-to-normal Condition |
Note |
|---|---|---|---|---|---|---|
|
C151A17 |
Power Steering Torque Sensor "A" Supply Voltage Circuit Voltage Above Threshold |
TRQV1 voltage is 5.6 V or more |
|
EPS warning light: Comes on |
Power switch on (IG) again |
- |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When the electric power steering column sub-assembly has been replaced, perform Power Steering ECU Initial Setting (torque sensor zero point calibration and assist map writing).
Click here
![2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for HV Model): CALIBRATION](/t3Portal/stylegraphics/info.gif)
-
When the power steering ECU with motor assembly has been replaced, perform Power Steering ECU Initial Setting (torque sensor zero point calibration and assist map writing).
Click here
PROCEDURE
|
1. |
INSPECT TORQUE SENSOR (ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY) (CHECK FOR SHORT) |
(a) Disconnect the z7 power steering ECU with motor assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
z7-7 (TRQV1) - Body ground |
Always |
10 kΩ or higher |
|
z7-7 (TRQV1) - z7-8 (TRQG1) |
Always |
10 kΩ or higher |
| NG |
|
REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY
|
|
|
2. |
INSPECT POWER STEERING ECU WITH MOTOR ASSEMBLY (POWER SOURCE OF TORQUE SENSOR) |
(a) Start the engine.
|
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| OK |
|
REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY
|
| NG |
|
REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY
|
|
|