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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Precaution
PRECAUTION HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM (a) This vehicle is equipped with a Supplemental Restraint System (SRS). Failure to carry out service operations in the correct sequence could cause the SRS to unexpectedly deploy during servicing. This may cause a serious accident. Before servic
Terminals Of Ecu
TERMINALS OF ECU COMBINATION METER ASSEMBLY (a) Measure the voltage, resistance and waveform according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition I10-2 (MSM+) - Body ground L - Body ground Steering pad
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