Lexus NX: Short in Motor Circuit (C1521,C1531-C1534)
DESCRIPTION
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition |
|---|---|---|---|---|---|
| C1521 | Short in Motor Circuit | Motor overcurrent | Power steering ECU assembly | On | Power switch on (IG) again |
| C1531 | ECU Malfunction | ECU internal malfunction (CPU malfunction) | Power steering ECU assembly | On | Power switch on (IG) again |
| C1532 | ECU Malfunction | ECU internal malfunction (Peripheral circuit malfunction) | Power steering ECU assembly | On | Power switch on (IG) again |
| C1533 | Temperature Sensor Circuit is Low or High | ECU internal malfunction (Substrate temperature sensor malfunction) | Power steering ECU assembly | Off | After normal confirmation |
| C1534 | EEPROM | ECU internal malfunction (EEPROM error) | Power steering ECU assembly | Torque and motor rotation angle sensor adjustment is set to the default value and control is continued. In this case, the warning light illuminates. | Power switch on (IG) again |
CAUTION / NOTICE / HINT
NOTICE:
If the power steering ECU assembly has been replaced, perform assist map writing.
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PROCEDURE
| 1. | CHECK FOR DTC |
(a) Clear the DTCs.
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(b) Check for DTCs.
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| Result | Proceed to |
|---|---|
| DTCs (except C1521, C1531, C1532, C1533 and C1534 DTC) are not output. | A |
| DTCs (except C1521, C1531, C1532, C1533 and C1534 DTC) are output. | B |
| A | .gif) | REPLACE POWER STEERING ECU ASSEMBLY |
| B | | REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
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DESCRIPTION The motor rotation angle sensor detects the motor rotation angle and sends this information to the power steering ECU assembly. DTC No. Detection Item DTC Detection Condition Trou
Vehicle Speed Signal (C1541)
DESCRIPTION The power steering ECU assembly receives vehicle speed signals from the skid control ECU via CAN communication. The ECU provides appropriate assisting force in accordance with the vehicle
SEE MORE:
Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
A bolt without a torque specification is shown in the standard bolt chart.
Click here PROCEDURE 1. INSTALL AIR CONDITIONING UNIT ASSEMBLY (a) Temporar
Removal
REMOVAL CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE 1. PRECAUTION NOTICE: After the power switch off is turned off, there may be a waiting time before disconnecting the auxiliary negative (-) battery t
