Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2006 Lexus LX 470FACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Chart
NOTE:
When removing parts, turn the ignition switch OFF.
HINT:
- Using SST 09843-18040, connect terminals TC and CG of the DLC3.
- If any abnormality is not found when inspecting parts, inspect the ECU and ground points for poor contact.
- If a trouble code is displayed during the DTC check, check the circuit listed for that code. For details of each code, turn to the example referred to for respective "DTC No." in the DTC chart.
- When 2 or more DTCs are recorded and the problem is not identified, perform circuit inspection of the other DTCs.
DTC chart of ABS
DTC CHART
| DTC No. | Detection Item | Trouble Area |
|---|---|---|
| C0200/31 *1 | Right Front Wheel Speed Sensor Signal Malfunction | Right front speed sensor Each speed sensor circuit Sensor rotor |
| C0205/32 *1 | Left Front Wheel Speed Sensor Signal Malfunction | Left front speed sensor Each speed sensor circuit Sensor rotor |
| C0210/33 *1 | Right Rear Wheel Speed Sensor Signal Malfunction | Right rear speed sensor Each speed sensor circuit Sensor rotor |
| C0215/34 *1 | Left Rear Wheel Speed Sensor Signal Malfunction | Left rear speed sensor Each speed sensor circuit Sensor rotor |
| C0226/21 | SFR Solenoid Circuit | Hydraulic brake booster SFRR or SRLH circuit |
| C0236/22 | SFL Solenoid Circuit | Hydraulic brake booster SFLR or SFLH circuit |
| C0246/23 | SRR Solenoid Circuit | Hydraulic brake booster SRRR or SRRH circuit |
| C0256/24 | SRL Solenoid Circuit | Hydraulic brake booster SRLR or SRLH circuit |
| C0278/11 | Open or Short Circuit in ABS Solenoid Relay Circuit | ABS solenoid relay ABS solenoid relay circuit |
| C0279/12 | Short to B+ in ABS Solenoid Relay Circuit | ABS solenoid relay ABS solenoid relay circuit |
| C1203/59 | ECM Communication Circuit Malfunction | TRC+ or TRC- circuit ENG+ or ENG- circuit Translate ECU Skid control ECU |
| C1225/25 | BA and TRAC Solenoid Circuit | Hydraulic brake booster SA1 circuit |
| C1226/26 | BA and TRAC Solenoid Circuit | Hydraulic brake booster SA2 circuit |
| C1227/27 | BA and TRAC Solenoid Circuit | Hydraulic brake booster SA3 circuit |
| C1228/28 | STR Solenoid Circuit | Hydraulic brake booster STR circuit |
| C1235/35 *2 | Foreign Object is Attached on Tip of Front Speed Sensor RH | Right front speed sensor Sensor rotor |
| C1236/36 *2 | Foreign Object is Attached on Tip of Front Speed Sensor LH | Left front speed sensor Sensor rotor |
| C1238/38 *2 | Foreign Object is Attached on Tip of Rear Speed Sensor RH | Right rear speed sensor Sensor rotor |
| C1239/39 *2 | Foreign Object is Attached on Tip of Rear Speed Sensor LH | Left rear speed sensor Sensor rotor |
| C1241/41 | Low Battery Positive Voltage or Abnormally High Battery Positive Voltage | Battery Voltage regulator Power source circuit |
| C1242/42 | IG2 Power Source Circuit | Battery Voltage regulator Power source circuit |
| C1243/43 | Acceleration Sensor Stuck Malfunction | Deceleration sensor Wire harness for deceleration sensor system |
| C1244/44 | Open or Short in Deceleration Sensor Circuit | Deceleration sensor Deceleration sensor circuit |
| C1245/45 | Acceleration Sensor Output Malfunction | Deceleration sensor Wire harness for deceleration sensor system |
| C1246/46 | Master Cylinder Pressure Sensor Malfunction | Master cylinder pressure sensor Master cylinder pressure sensor circuit |
| C1249/49 | Open in Stop Light Switch Circuit | Stop light bulb Stop light switch circuit |
| C1251/51 *2 | Open in Pump Motor Circuit | Hydraulic brake booster pump motor |
| C1252/52 *2 | Brake Booster Pump Motor on Time Abnormally Long | Hydraulic brake booster pump motor Hydraulic brake booster pump motor circuit Pressure switch (PH or PL) |
| C1253/53 *2 | Hydro Booster Pump Motor Relay Malfunction | ABS motor 1 or ABS motor 2 relay ABS motor 1 or ABS motor 2 relay circuit Hydraulic brake booster pump motor circuit |
| C1254/54 *2 | Pressure Switch Circuit | Pressure switch (PH or PL) Pressure switch circuit |
| C1256/56 *2 | Accumulator Low Pressure | Accumulator Pressure switch (PH or PL) Skid control ECU |
| C1257/57 *2 | IG Power Source | Battery Power source circuit Skid control ECU |
| C1268/68 | Transfer "L4" Position Switch Circuit | Transfer L4 position switch Transfer L4 position switch circuit |
HINT:
- *1: As the DTC cannot be erased by replacing parts alone, do either of the following operations.
- Clear the DTC.
- At a speed of 20 km/h (12 mph), drive the vehicle for 30 seconds or more.
- *2: Using the following table, troubled parts can be specified.
DTC chart of VSC
DTC CHART
| DTC No. | Detection Item | Trouble Area |
|---|---|---|
| C1201/51 | Engine Control System Malfunction | Engine control system |
| C1203/53 | ECM Communication Circuit Malfunction | TRC+ or TRC- circuit ENG+ or ENG- circuit Translate ECU Skid control ECU |
| C1210/36 | Zero Point Calibration of Yaw Rate Sensor Undone | Yaw rate sensor Yaw rate sensor circuit PNP switch circuit (P position) |
| C1223/43 | ABS Control System Malfunction | ABS control system |
| C1231/31 | Steering Angle Sensor Circuit Malfunction | Steering angle sensor Steering angle sensor circuit |
| C1232/32 | Stuck in Deceleration Sensor | Deceleration sensor Deceleration sensor circuit |
| C1233/33 | Open or Short Circuit in Yaw Rate Sensor Circuit | Yaw rate sensor Yaw rate sensor circuit |
| C1234/34 | Yaw Rate Sensor Malfunction | Yaw rate sensor Yaw rate sensor circuit |
| C1289/41 | VGRS Control System Malfunction | VGRS control system |
| C1290/66 | Steering Angle Sensor Zero Point Malfunction | Steering angle sensor zero point calibration Yaw rate sensor zero point calibration |
| C1291/48 | VGRS ECU Communication Error | VSC+ or VSC- circuit AFS+ or AFS- circuit VGRS ECU Skid control ECU assembly |
| C1335/35 | Steering Angle Sensor Circuit | Steering angle sensor Steering angle sensor circuit |
| C1336/39 | Zero Point Calibration of Deceleration Sensor Undone | Deceleration sensor Deceleration sensor circuit PNP switch (P position) circuit |
| C1340/47 | Center Differential Lock Circuit | Center differential lock system Center differential lock circuit |
| C1369/26 | Translate ECU Malfunction | Translate ECU |
| U0073/94 | Control Module Communication Bus OFF | CAN communication system |
| U0100/65 | Lost Communication with ECM / PCM | CAN communication system |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.