Lexus RX (RX 350L, RX450h) 2016-2026 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) 2016-2026 Repair Manual > Front Seat Cushion Heater: 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 front seat cushion heater removal/installation are shown below. Necessary Procedures After Parts Removed ...
Lexus RX (RX 350L, RX450h) 2016-2026 Owners Manual > Opening, closing the windows and moon roof: Panoramic moon roof
Use the overhead switches to operate the panoramic moon roof and
electronic
sunshade.
Opening and closing the electronic sunshade
Opens the electronic sunshade
Slide and hold the switch
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The electronic sunshade will fully
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Closes the electronic sunshad ...
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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