Lexus NX: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Power Steering System| DTC No. | Detection Item | Warning Indicate | Return-to-normal Condition | Link |
|---|---|---|---|---|
| C1511 | Torque Sensor1 | On | Power switch on (IG) again | |
| C1512 | Torque Sensor2 | On | Power switch on (IG) again | |
| C1513 | Torque Sensor Deviation Excessive | On | Power switch on (IG) again | |
| C1514 | Torque Sensor Power Supply Voltage | On | Power switch on (IG) again | |
| C1521 | Short in Motor Circuit | On | Power switch on (IG) again | |
| C1524 | Motor Terminal Voltage | On | Power switch on (IG) again | |
| C1528 | Motor Rotation Angle Sensor | On | Power switch on (IG) again | |
| C1531 | ECU Malfunction | On | Power switch on (IG) again | |
| C1532 | ECU Malfunction | On | Power switch on (IG) again | |
| C1533 | Temperature Sensor Circuit is Low or High | Off | After normal confirmation | |
| C1534 | EEPROM | 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 | |
| C1541 | Vehicle Speed Signal | On | After normal confirmation | |
| C1551 | IG Power Supply Voltage | On | After normal confirmation | |
| C1552 | PIG Power Supply Voltage | On | After normal confirmation | |
| C1554 | Power Supply Relay Failure | On | Power switch on (IG) again | |
| C1555 | Motor Relay Welding Failure | On | Power switch on (IG) again | |
| C1567 | Error in Matching of ECUs | On | Power switch on (IG) again | |
| C1581 | Assist Map Number Un-Writing | On | Assist map written | |
| C1582 | Assist Map Number Mismatch | Off | Assist map written | |
| U0129 | Lost Communication with Brake System Control Module | On | After normal confirmation | |
| U0293 | Lost Communication with Hybrid Control Module | On | After normal confirmation | |
| U1104 | Lost Communication with Driving Support ECU | Off | After normal confirmation | |
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On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. CHECK STEERING EFFORT (TORQUE) CAUTION: These service operations may affect the SRS airbags. Be sure to read the precautionary notices concerning the SRS airbag syst
Torque Sensor1 (C1511-C1514)
DESCRIPTION The torque sensor converts the steering wheel rotation torque into electric signals and sends them to the power steering ECU assembly. DTC No. Detection Item DTC Detection Condition
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
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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
Removal
REMOVAL PROCEDURE 1. REMOVE STEERING WHEEL ASSEMBLY Click here 2. REMOVE STEERING PAD SWITCH ASSEMBLY Click here 3. REMOVE CRUISE CONTROL MAIN SWITCH Click here 4. REMOVE SHIFT PADDLE SWITCH (TRANSMISSION SHIFT SWITCH ASSEMBLY) Click here 5. REMOVE STEERING WHEEL HEATER CONTROL ASSEMBLY (
