Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Short in Motor Circuit (C1521-C1523,C1528,C1531-C1555)
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 .gif)
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 | .gif) | REPLACE POWER STEERING ECU ASSEMBLY |
| B | | GO TO DIAGNOSTIC TROUBLE CODE CHART |
Torque Sensor Zero Point Adjustment Incomplete (C1516)
DESCRIPTION This DTC does not indicate a malfunction. The power steering ECU assembly stores this DTC when it determines that torque sensor zero point calibration has not completed. DTC No. Detec ...
Vehicle Speed Signal (C1541)
DESCRIPTION The power steering ECU assembly receives vehicle speed signals from the skid control ECU (brake actuator assembly) via CAN communication. The ECU provides appropriate assist force in accor ...
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Lexus RX (RX 350L, RX450h) 2016-2025 Owners Manual > Lexus RX (RX 350L, RX450h) 2016-2025 Owners Manual: For owners
Reporting safety defects for
U.S. owners
If you believe that your vehicle has a defect which could cause a crash
or could
cause injury or death, you should immediately inform the National Highway
Traffic Safety Administration (NHTSA) in addition to notifying the Lexus
Division
of Toyota Mot ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Audio And Visual System (for 8 Inch Display): D-Seat ECU Vehicle Information Reading/Writing Process Malfunction (B15F8)
DESCRIPTION This DTC is stored when items controlled by the main body ECU (multiplex network body ECU) cannot be customized via the audio and visual system vehicle customization screen. HINT: The main body ECU (multiplex network body ECU) controls the front power seat control system (w/ Memory) rela ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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