| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM10000000257F9 |
| Model Year Start: 2023 | Model: Corolla | Prod Date Range: [09/2022 - ] |
| Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for HV Model): C151A17; Power Steering Torque Sensor "A" Supply Voltage Circuit Voltage Above Threshold; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] | ||
|
DTC |
C151A17 |
Power Steering Torque Sensor "A" Supply Voltage Circuit Voltage Above Threshold |
DESCRIPTION
The power steering ECU 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
PROCEDURE
|
1. |
INSPECT TORQUE SENSOR (ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY) (CHECK FOR SHORT) |
(a) Disconnect the z7 power steering ECU 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
|
![2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: REMOVAL](/t3Portal/stylegraphics/info.gif)
|
|
2. |
INSPECT POWER STEERING ECU 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 ASSEMBLY
|
|
|