Lexus NX: Electronically Controlled Brake System
Lexus NX Service Manual / Brake / Brake Control / Dynamic Control Systems / Electronically Controlled Brake System
- Precaution
- Parts Location
- System Diagram
- System Description
- How To Proceed With Troubleshooting
- Check For Intermittent Problems
- Initialization
- Calibration
- Test Mode Procedure
- Problem Symptoms Table
- Terminals Of Ecu
- Diagnosis System
- Dtc Check / Clear
- Freeze Frame Data
- Fail-safe Chart
- Data List / Active Test
- Diagnostic Trouble Code Chart
- Master Reservoir Level Malfunction (C1202)
- ECM Communication Circuit (C1203)
- Zero Point Calibration of Yaw Rate Sensor undone (C1210,C1336)
- SLA Linear Solenoid (C1211,C1212,C1225-C1228,C1352,C1353,C1356,C1357)
- Hydraulic Control System Malfunction (C1214)
- Steering Angle Sensor Circuit (C1231)
- Yaw Rate Sensor (C1234,C1243-C1245,C1279)
- Foreign Object is Attached on Tip of Front Speed Sensor RH (C1235,C1236,C1238,C1239,C1275-C1278)
- Low or High Power Supply Voltage (C1241,C1242)
- Master Cylinder Pressure Sensor (C1246,C1281,C1364)
- Stroke Sensor (C1247,C1346,C1392)
- Open Circuit in Stop Light Switch Circuit (C1249)
- Brake Booster Pump Motor on Time Abnormally Long (C1252,C1253)
- Accumulator Low Pressure (C1256)
- Power Supply Drive Circuit (C1257)
- HV Control System Regenerative Malfunction (C1259,C1310)
- Low Output Signal of Front Speed Sensor RH (C1271,C1272,C1464,C1465)
- Low Output Signal of Rear Speed Sensor RH (C1273,C1274,C1466,C1467)
- Abnormal Zero Point of Steering Angle Sensor (C1290)
- Skid Control ECU Malfunction (C1300)
- Open Circuit in Main Relay 1 (C1311,C1312)
- Linear Solenoid Valve Offset Learning undone (C1345,C1368)
- Different Diameter Tire Malfunction (C1348)
- Accumulator Pressure Sensor (C1365)
- Stop Light Relay Malfunction (C1380)
- Abnormal Power Supply Voltage in Yaw Rate and/or Deceleration Sensor (C1381)
- Abnormal Leak in Accumulator (C1391)
- EPB System Malfunction (C13AF)
- Steering Angle Sensor Initialization Incomplete (C1439,C1445)
- Steering Angle Sensor Unusual Bank Angle Detected (C1440)
- Invalid Data Received from Deceleration Sensor (C1442,C1443)
- Motor Drive Permission Malfunction (C1451)
- Control Module Communication Bus OFF (U0073,U0120,U0123,U0124,U0126,U0128,U0293)
- ABS Warning Light Remains ON
- ABS Warning Light does not Come ON
- Brake Warning Light Remains ON
- Brake Warning Light does not Come ON
- Brake Control Warning Light Remains ON
- Brake Control Warning Light does not Come ON
- Brake Hold Standby Indicator Light Circuit
- Slip Indicator Light Remains ON
- Slip Indicator Light does not Come ON
- VSC OFF Switch Circuit
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Precaution
PRECAUTION TROUBLESHOOTING PRECAUTIONS (a) When there is a malfunction with terminal contact points or part installation problems, removal and installation of the suspected problem parts may return th
Parts Location
PARTS LOCATION ILLUSTRATION *A w/o AVS - - *1 FRONT AXLE HUB SUB-ASSEMBLY RH - FRONT SPEED SENSOR ROTOR RH *2 FRONT SPEED SENSOR RH *3 FRONT AXLE HUB SUB-ASSEMBLY LH - FRONT
System Diagram
SYSTEM DIAGRAM Transmitting ECU (Transmitter) Receiving ECU Signal Communication Method Skid control ECU (Brake booster with master cylinder assembly) Power steering ECU assembly
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Installation
INSTALLATION PROCEDURE 1. INSTALL INTEGRATION CONTROL AND PANEL ASSEMBLY (a) Install the integration control and panel assembly to the rear upper console panel sub-assembly with the 2 screws. HINT: The locations labeled A in the illustration are tightened together with the shift position indicato
Rear Door RH Entry Lock and Unlock Functions do not Operate
DESCRIPTION If the entry lock and unlock functions do not operate for the rear door RH only, the request code may not be being transmitted from the rear door RH or the rear door outside handle assembly RH (touch sensor) may be malfunctioning. If the entry functions for other doors operate properly,
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