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 assembly |
EPS warning light: Comes on |
Ignition switch ON again |
- |
C1522 |
Power Supply Sensor |
Motor current sensor malfunction |
Power steering ECU assembly |
EPS warning light: Comes on |
Ignition switch ON again |
- |
C1523 |
Current Deviation Excessive |
Excessively large current deviation |
Power steering ECU assembly |
EPS warning light: Comes on |
Ignition switch ON again |
- |
C1528 |
Motor Rotation Angle Sensor |
Motor rotation angle sensor malfunction |
Power steering ECU assembly |
EPS warning light: Comes on |
Ignition switch ON again |
- |
C1531 |
ECU Malfunction |
ECU internal malfunction (CPU malfunction) |
Power steering ECU assembly |
EPS warning light: Comes on |
The ECU judges the system has returned to normal or the ignition switch is turned ON again |
- |
C1532 |
ECU Malfunction |
ECU internal malfunction (Peripheral circuit malfunction) |
Power steering ECU assembly |
EPS warning light: Comes on |
Ignition switch ON again |
- |
C1533 |
Temperature Sensor Circuit is Low or High |
ECU internal malfunction (Substrate temperature sensor malfunction) |
Power steering ECU assembly |
EPS warning light: Comes on |
Ignition switch ON again |
- |
C1534 |
EEPROM |
ECU internal malfunction (EEPROM error) |
Power steering ECU assembly |
EPS warning light: Comes on |
Ignition switch ON again |
- |
C1555 |
Motor Relay Welding Failure |
Motor relay circuit malfunction |
Power steering ECU assembly |
EPS Warning Light: Comes on |
Ignition switch ON again |
- |
CAUTION / NOTICE / HINT
NOTICE:
If the power steering ECU assembly has been replaced, perform assist map writing and torque sensor zero point calibration.
Click here
PROCEDURE
1. |
CHECK FOR DTC |
(a) Clear the DTCs.
Click here
(b) Check for DTCs.
Click here
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 ASSEMBLY |
B | ![]() |
GO TO DIAGNOSTIC TROUBLE CODE CHART
|
Toyota CH-R Service Manual > Can Communication System: System Diagram
SYSTEM DIAGRAM
(a) The CAN communication system is composed of 5 buses.
*A
w/ Blind Spot Monitor System
-
-
CAN Main Bus Line
Terminating Resistor
CAN Branch Line
*
...
Toyota CH-R Service Manual > Vehicle Stability Control System: Control Module Communication Bus OFF (U0073,U0100,U0123,U0126,U0142)
DESCRIPTION
The skid control ECU (brake actuator assembly) receives signals from the ECM,
steering angle sensor, yaw rate and acceleration sensor (airbag sensor assembly)
and main body ECU (multiplex network body ECU) via CAN communication.
DTC No.
Detection Item
...