2007 Lexus GX 470FACTORY OEM SERVICE PROCEDURE

Diagnostic Trouble Code Table

HINT:

  • If a trouble code is displayed during the DTC check, check the circuit indicated by the DTC. For details of each code, turn to the information for the respective DTC Code in the DTC table.
  • Inspect the fuse and relay before investigating the trouble areas as shown in the table below.

DTC Table of ABS: 

DIAGNOSTIC TROUBLE CODE TABLE

DTC Code Detection Item Trouble Areas
C0200/31  (*1) Front Speed Sensor RH Circuit
  1. Front speed sensor RH
  2. Speed sensor circuit
  3. Speed sensor rotor
  4. Sensor installation
  5. Master cylinder solenoid (Skid control ECU)
C0205/32  (*1) Front Speed Sensor LH Circuit
  1. Front speed sensor LH
  2. Speed sensor circuit
  3. Speed sensor rotor
  4. Sensor installation
  5. Master cylinder solenoid (Skid control ECU)
C0210/33  (*1) Rear Speed Sensor RH Circuit
  1. Rear speed sensor RH
  2. Speed sensor circuit
  3. Speed sensor rotor
  4. Sensor installation
  5. Master cylinder solenoid (Skid control ECU)
C0215/34  (*1) Rear Speed Sensor LH Circuit
  1. Rear speed sensor LH
  2. Speed sensor circuit
  3. Speed sensor rotor
  4. Sensor installation
  5. Master cylinder solenoid (Skid control ECU)
C0226/21  SFR Solenoid Circuit
  1. SFRH or SFRR circuit
  2. Master cylinder solenoid
C0236/22  SFL Solenoid Circuit
  1. SFLH or SFLR circuit
  2. Master cylinder solenoid
C0246/23  SRR Solenoid Circuit
  1. SRRH or SRRR circuit
  2. Master cylinder solenoid
C0256/24  SRL Solenoid Circuit
  1. SRLH or SRLR circuit
  2. Master cylinder solenoid
C0278/11  Open or Short Circuit in ABS Solenoid Relay Circuit
  1. ABS SOL fuse
  2. ABS solenoid relay
  3. ABS solenoid relay circuit
  4. Master cylinder solenoid
C0279/12  Short to B+ in ABS Solenoid Relay Circuit
  1. ABS SOL fuse
  2. ABS solenoid relay
  3. ABS solenoid relay circuit
  4. Master cylinder solenoid
C1202/58  Brake Fluid Level Low/Open
Circuit In Brake Fluid Level
Warning Switch Circuit
  1. Brake fluid level
  2. Brake fluid level warning switch
  3. Brake fluid level warning switch circuit
  4. Master cylinder solenoid (Skid control ECU)
C1225/25  SMC Solenoid Circuit
  1. SMCF circuit
  2. Master cylinder solenoid
C1226/26  SPC Solenoid Circuit
  1. SREA circuit
  2. Master cylinder solenoid
C1227/27  SRC Solenoid Circuit
  1. SREC circuit
  2. Master cylinder solenoid
C1228/28  STR Solenoid Circuit
  1. STR circuit
  2. Master cylinder solenoid
C1235/35  Foreign Object is Attached on Tip of Front Speed Sensor RH
  1. Front speed sensor RH
  2. Speed sensor rotor
  3. Sensor installation
  4. Master cylinder solenoid (Skid control ECU)
C1236/36  Foreign Object is Attached on Tip of Front Speed Sensor LH
  1. Front speed sensor LH
  2. Speed sensor rotor
  3. Sensor installation
  4. Master cylinder solenoid (Skid control ECU)
C1238/38  Foreign Object is Attached on Tip of Rear Speed Sensor RH
  1. Rear speed sensor RH
  2. Speed sensor rotor
  3. Sensor installation
  4. Master cylinder solenoid (Skid control ECU)
C1239/39  Foreign Object is Attached on Tip of Rear Speed Sensor LH
  1. Rear speed sensor LH
  2. Speed sensor rotor
  3. Sensor installation
  4. Master cylinder solenoid (Skid control ECU)
C1241/41  Low Battery Positive Voltage
  1. Battery
  2. ECU-IG fuse
  3. Charging system
  4. Power source circuit
C1242/42  IG2 Power Source Circuit
  1. Battery
  2. IC regulator
  3. Power source circuit
  4. IGN fuse
C1243/43  (*1) Acceleration Sensor Stuck Malfunction
  1. Yaw rate and acceleration sensor
  2. Yaw rate and acceleration sensor circuit
  3. CAN communication system
C1244/44  Open or Short in Deceleration Sensor Circuit
  1. Yaw rate and acceleration sensor
  2. Yaw rate and acceleration sensor circuit
  3. CAN communication system
C1245/45  (*1) Acceleration Sensor Output Malfunction
  1. Yaw rate and acceleration sensor
  2. Yaw rate and acceleration sensor circuit
  3. CAN communication system
C1246/46  Master Cylinder Pressure Sensor Malfunction
  1. Master cylinder pressure sensor
  2. Master cylinder pressure sensor circuit
  3. Master cylinder solenoid
C1249/49  Open in Stop Light Switch Circuit
  1. Stop light switch
  2. Stop light switch circuit
  3. Rear combination light (stop light) assembly
  4. Master cylinder solenoid (Skid control ECU)
C1251/51  (*1, 3) Open in Pump Motor Circuit Hydraulic brake booster pump motor circuit
C1252/52  (*2, 3) Brake Booster Pump Motor on Time Abnormally Long
  1. Hydraulic brake booster pump motor
  2. Hydraulic brake booster pump motor circuit
  3. Accumulator pressure sensor
C1253/53  (*2) Hydro Booster Pump Motor Relay Malfunction
  1. Hydraulic brake booster pump motor
  2. Hydraulic brake booster pump motor circuit
C1254/54  Pressure Switch Circuit
  1. Hydraulic brake booster
  2. Accumulator pressure sensor
  3. Master cylinder pressure sensor
C1256/56  (*2, 3) Accumulator Low Pressure
  1. Hydraulic brake booster
  2. Hydraulic brake booster pump motor
  3. Hydraulic brake booster pump motor circuit
  4. Accumulator pressure sensor
C1257/57  (*2) IG Power Source Hydraulic brake booster pump motor circuit
C1268/68  Transfer "L4" Position Switch Circuit
  1. Transfer indicator (L4) switch
  2. Transfer indicator (L4) switch circuit
C1337/37  Different Diameter Tire Malfunction
  1. Speed sensor
  2. Speed sensor rotor
  3. Speed sensor circuit
  4. Tire size
C1381/97  Yaw Rate and/or Acceleration Sensor Power Supply Voltage Malfunction
  1. Yaw rate and acceleration sensor
  2. Yaw rate and acceleration sensor power source circuit
  3. CAN communication system
U0073/94  Control Module Communication Bus OFF Wire harness
U0124/95  Lost Communication with Lateral Acceleration Sensor Module
  1. Wire harness
  2. Yaw rate and acceleration sensor
(*1), (*2):
Even after the trouble areas are repaired, the ABS warning light will not go off unless the following operations are performed.
  • (*1):
    1. Drive the vehicle at 12 mph (20 km/h) for 30 seconds or more and check that the ABS warning light goes off.
    2. Clear the DTC.
  • (*2):
    1. Keep the vehicle in a stationary condition for 5 seconds or more and depress the brake pedal lightly 2 or 3 times.
    2. Repeat the above operations 3 times or more and check that the ABS warning light goes off.
    3. Clear the DTC.

HINT:
  • In some cases, the intelligent tester cannot be used when the ABS warning light remains on.
  • When U0073/94, U0100/65, U0123/62, U0124/95 or U0126/63 is output, inspect and repair the trouble areas indicated by these codes first.

(*3): The skid control buzzer sounds.

DTC Table of VSC: 

DIAGNOSTIC TROUBLE CODE TABLE

DTC Code Detection Item Trouble Areas
C1201/51  Engine Control System Malfunction Engine control system
C1202/52  Brake Fluid Level Low/Open
Circuit In Brake Fluid Level
Warning Switch Circuit
  1. Brake fluid level
  2. Brake fluid level warning switch
  3. Brake fluid level warning switch circuit
  4. Master cylinder solenoid (Skid control ECU)
C1203/53  ECM Communication Circuit Malfunction ECM
C1210/36  Zero Point Calibration of Yaw Rate Sensor Undone
  1. Yaw rate and acceleration sensor
  2. Zero point calibration undone
  3. Park / Neutral position switch (P position) circuit
  4. Master cylinder solenoid (Skid control ECU)
C1223/43  ABS Control System Malfunction ABS control system
C1231/31  Steering Angle Sensor Circuit Malfunction
  1. Steering angle sensor
  2. Steering angle sensor circuit
  3. Steering angle sensor power supply
  4. CAN communication system
  5. Master cylinder solenoid (Skid control ECU)
C1232/32  Stuck in Deceleration Sensor
  1. Yaw rate and acceleration sensor
  2. Yaw rate and acceleration sensor circuit
  3. CAN communication system
C1234/34  Yaw Rate Sensor Malfunction
  1. Yaw rate and acceleration sensor
  2. Yaw rate and acceleration sensor circuit
  3. CAN communication system
C1290/66  Steering Angle Sensor Zero Point Malfunction Steering angle sensor
C1336/39  Zero Point Calibration of Acceleration Sensor Undone
  1. Yaw rate and acceleration sensor
  2. Zero point calibration undone
  3. Park / Neutral position switch (P position) circuit
  4. Master cylinder solenoid (Skid control ECU)
C1340/47  Center Differential Lock Circuit
  1. Center diff. lock switch
  2. Center diff. lock switch circuit
  3. 4WD control ECU
C1380/64  Stop Light Control Relay Malfunction
  1. Stop light operation relay
  2. Stop light operation relay circuit
  3. Master cylinder solenoid (Skid control ECU)
U0100/65  Lost Communication with ECM / PCM Wire harness
U0123/62  Lost Communication with Yaw Rate Sensor Module
  1. Wire harness
  2. Yaw rate and acceleration sensor
U0126/63  Lost Communication with Steering Angle Sensor Module
  1. Wire harness
  2. Steering angle sensor

HINT:

In some cases, the intelligent tester cannot be used when the VSC TRAC warning light remains on.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.