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 | Engine switch on (IG) again | - |
C1522 | Power Supply Sensor | Motor current sensor malfunction | Power steering ECU assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1523 | Current Deviation Excessive | Excessively large current deviation | Power steering ECU assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1528 | Motor Rotation Angle Sensor | Motor rotation angle sensor malfunction | Power steering ECU assembly | EPS warning light: Comes on | Engine switch on (IG) 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 power switch is turned on (IG) again | - |
C1532 | ECU Malfunction | ECU internal malfunction (Peripheral circuit malfunction) | Power steering ECU 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 assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1534 | EEPROM | ECU internal malfunction (EEPROM error) | Power steering ECU assembly | EPS warning light: Comes on | Engine switch on (IG) again | - |
C1555 | Motor Relay Welding Failure | Motor relay circuit malfunction | Power steering ECU assembly | EPS Warning Light: Comes on | Engine switch on (IG) 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 |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Seat Heater Switch (for Rear Side): Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during rear seat heater switch removal/installation are shown below. Necessary Procedure After Parts Removed/In ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Sfi System: Thermostat Heater Control Circuit Short to Ground or Open (P059714)
DESCRIPTION Refer to DTC P059712. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P059714 Thermostat Heater Control Circuit Short to Ground or Open Open or short in thermostat heater circuit and power supply circuit (1 trip detection lo ...