DESCRIPTION
If the power steering ECU detects these DTCs, it will shut off the motor relay circuit (built into the power steering ECU) and stop power assist. However, power assist continues if DTC C1533 or C1534 is stored.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
C1521 |
Motor overcurrent |
Power steering ECU |
C1531 |
ECU internal malfunction (CPU malfunction) |
Power steering ECU |
C1532 |
ECU internal malfunction (Peripheral circuit malfunction) |
Power steering ECU |
C1533 |
ECU internal malfunction (Substrate temperature sensor malfunction) |
Power steering ECU |
C1534 |
ECU internal malfunction (EEPROM error) |
Power steering ECU |
C1554 |
Power source relay circuit malfunction |
Power steering ECU |
CAUTION / NOTICE / HINT
NOTICE:
If the power steering ECU has been replaced with a new one, perform the rotation
angle sensor initialization and torque sensor zero point calibration (See page
).
PROCEDURE
1. |
CHECK FOR DTC |
(a) Clear the DTCs (See page ).
(b) Check for DTCs (See page ).
OK:
DTC is not output.
OK | ![]() |
CHECK INTERMITTENT PROBLEMS |
NG | ![]() |
REPLACE POWER STEERING ECU |
SRS Warning Light Remains ON
DESCRIPTION
The SRS warning light is located on the combination meter assembly.
When the SRS is normal, the SRS warning light comes on for approximately 6 seconds
after the ignition switch is turned from off to ON, and then goes off automatically.
If ther ...
Follow the correction procedures. (smart key system)
After taking the specified steps to correct the suspected problem, check that
the warning light turns off.
- If the malfunction indicator lamp comes on while driving
First check the following:
• Is the fuel empty?
If it is, fill the fuel tan ...
Interior lights list
Your Toyota is equipped with the illuminated entry system to assist in entering
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key (vehi ...