| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001C0X6 |
| 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)): C1521-C1523,C1528,C1531-C1555; Short in Motor Circuit; 2019 - 2020 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2019] | ||
|
DTC |
C1521 |
Short in Motor Circuit |
|
DTC |
C1522 |
Power Supply Sensor |
|
DTC |
C1523 |
Current Deviation Excessive |
|
DTC |
C1528 |
Motor Rotation Angle Sensor |
|
DTC |
C1531 |
ECU Malfunction |
|
DTC |
C1532 |
ECU Malfunction |
|
DTC |
C1533 |
Temperature Sensor Circuit is Low or High |
|
DTC |
C1534 |
EEPROM |
|
DTC |
C1555 |
Motor Relay Welding Failure |
DESCRIPTION
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Warning Indicate |
Return-to-normal Condition |
Note |
|---|---|---|---|---|---|---|
|
C1521 |
Short in Motor Circuit |
Motor overcurrent |
Power steering ECU with motor assembly |
EPS warning light: Comes on |
Engine switch on (IG) again |
- |
|
C1522 |
Power Supply Sensor |
Motor current sensor malfunction |
Power steering ECU with motor assembly |
EPS warning light: Comes on |
Engine switch on (IG) again |
- |
|
C1523 |
Current Deviation Excessive |
Excessively large current deviation |
Power steering ECU with motor assembly |
EPS warning light: Comes on |
Engine switch on (IG) again |
- |
|
C1528 |
Motor Rotation Angle Sensor |
Motor rotation angle sensor malfunction |
Power steering ECU with motor assembly |
EPS warning light: Comes on |
Engine switch on (IG) again |
- |
|
C1531 |
ECU Malfunction |
ECU internal malfunction (CPU malfunction) |
Power steering ECU with motor assembly |
EPS warning light: Comes on |
The ECU judges the system has returned to normal or the engine switch is turned on (IG) again |
- |
|
C1532 |
ECU Malfunction |
ECU internal malfunction (Peripheral circuit malfunction) |
Power steering ECU with motor assembly |
EPS warning light: Comes on |
Engine switch on (IG) again |
- |
|
C1533 |
Temperature Sensor Circuit is Low or High |
ECU internal malfunction (Substrate temperature sensor malfunction) |
Power steering ECU with motor assembly |
EPS warning light: Comes on |
Engine switch on (IG) again |
- |
|
C1534 |
EEPROM |
ECU internal malfunction (EEPROM error) |
Power steering ECU with motor assembly |
EPS warning light: Comes on |
Engine switch on (IG) again |
- |
|
C1555 |
Motor Relay Welding Failure |
Motor relay circuit malfunction |
Power steering ECU with motor assembly |
EPS Warning Light: Comes on |
Engine switch on (IG) again |
- |
CAUTION / NOTICE / HINT
NOTICE:
If the Power steering ECU with motor assembly has been replaced, perform assist map writing and torque sensor zero point calibration.
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)): CALIBRATION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Clear the DTCs.
Click here
Chassis > EMPS > Clear DTCs
(b) Check for DTCs.
Click here
Chassis > EMPS > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs other than C1521, C1522, C1523, C1528, C1531, C1532, C1533, C1534 or C1555 are not output. |
A |
|
DTCs other than C1521, C1522, C1523, C1528, C1531, C1532, C1533, C1534 or C1555 are output. |
B |
| A |
|
REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY
|
| B |
|
GO TO DIAGNOSTIC TROUBLE CODE CHART
|
|
|