Lexus NX: Fail-safe Chart
FAIL-SAFE CHART
| DTC | Trouble Area | Brake Warning Light / Yellow (Minor Malfunction) | Parking Brake Indicator Light (Red) | Fail-safe Deactivation Condition |
|---|---|---|---|---|
| C1245 | Deceleration sensor data malfunction | Illuminates | Normal | Power switch off |
| C13A0 | Open in power supply relay circuit | Illuminates | Normal | Power switch off |
| C13A1 | Short in power supply relay circuit | Illuminates | Normal | Power switch off |
| C13A2 | Power switch malfunction | Illuminates | Normal | Power switch off |
| C13A3 | Open or short in lock switch circuit | Illuminates | Normal | Power switch off |
| C13A4 | Open or short in release switch circuit | Illuminates | Normal | Electric parking brake switch (integration control and panel assembly) normal |
| C13A5 | Parking brake motor (Parking brake actuator assembly) current monitor malfunction | Illuminates | Flashes during electric parking brake switch (integration control and panel assembly) operation | Power switch off |
| C13A6 | Parking brake motor (Parking brake actuator assembly) open or short malfunction | Illuminates | Flashes during electric parking brake switch (integration control and panel assembly) operation | Power switch off |
| C13A7 | Parking brake actuator assembly malfunction (jamming, spinning, repeated slipping) | Illuminates | Flashes during electric parking brake switch (integration control and panel assembly) operation | Recovery not possible until parking brake actuator assembly becomes normal |
| C13AA | Electric parking brake high temperature | Does not illuminate | Blinks | Wait 1 minute |
| C13AB | Lock switch comparison malfunction | Illuminates | Normal | Power switch off |
| C13AC | Release switch comparison malfunction | Illuminates | Normal | Electric parking brake switch (integration control and panel assembly) normal |
| C13AD | +B open circuit malfunction | Illuminates | Normal | Power switch off |
| C13AE | System information not received malfunction | Illuminates | Blinks | System information received |
| C13B0 | ECU malfunction | Illuminates | Normal (flashes when EEPROM malfunction occurs) | Recovery not possible until parking brake actuator assembly becomes normal |
| U0073 | CAN communication system malfunction | Illuminates | Normal | Power switch off |
| U0124 | Deceleration sensor (airbag ECU assembly) communication malfunction | Illuminates | Normal | Communication normal, power switch off |
| U0129 | Brake system communication malfunction | Illuminates | Normal | Communication normal, power switch off |
| U0293 | Hybrid vehicle control ECU communication malfunction | Illuminates | Normal | Communication normal, power switch off |
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Data List / Active Test
DATA LIST / ACTIVE TEST READ DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any part
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART ELECTRIC PARKING BRAKE SYSTEM DTC No. Detection Item Memory Note Link C1245 Deceleration Sensor Yes An electric parking brake system malfunction is d
Deceleration Sensor (C1245)
DESCRIPTION The parking brake ECU assembly receives vehicle tilt information from the deceleration sensor (airbag ECU assembly) via CAN communication. DTC No. Detection Item DTC Detection Condi
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Precaution
PRECAUTION PRECAUTIONS FOR FRONT RADAR SENSOR SYSTEM (a) The millimeter wave radar sensor assembly may not be able to reliably detect the following objects:
Pylons made from plastic, etc., glass surfaces such as the entrance to a convenience store, low to the ground objects such as curbs, etc.
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS
NEXT 3. CONNECT TECHSTREAM TO DLC3* HINT: If the display indicates a communication malfunction, inspect the DLC
