1997 Lexus LS 400FACTORY OEM SERVICE PROCEDURE

Traction Control System DTCS

TRACTION CONTROL SYSTEM DTCS

OEM Code Description
24 Sub-Throttle Actuator Open Or Short Circuit
25 Step Motor Does Not Move To A ECU Decided Position
26 Sub-Throttle Valve Does Not Move Even When Sub-Throttle Is Controlled To Fully Open Position By ECU
28(1) Throttle Valve Motor Driver Malfunction
29(1) Malfunction In Throttle Valve Motor Driver
31(2) Right Front Wheel Speed Sensor Signal Malfunction
32(2) Left Front Wheel Speed Sensor Signal Malfunction
33(2) Right Rear Wheel Speed Sensor Signal Malfunction
34(2) Left Rear Wheel Speed Sensor Signal Malfunction
41(2) Low Or High Battery Voltage
43 ABS Control System Malfunction (Except GS300)
43(3) ABS Or TRAC (BRAKE) Control System Malfunction (GS300)
44 Open Or Short In NE Signal Circuit
45(2) Main Throttle Position Sensor Circuit Malfunction
46(2)(4) Main Throttle Position Sensor Signal Malfunction
47 Sub-Throttle Position Sensor Circuit Malfunction
48 Open Or Short In Sub-Throttle Position Sensor Circuit
49(2) Open Or Short In Engine Communication Circuit
51(5) ECM System Malfunction (Except GS300)
51(6) Engine & ECT System Malfunction (GS300)
52 Low Brake Fluid Level (Except GS300)
53 ECM Communication Circuit Malfunction (Except GS300)
61 ABS/TRAC ECU & TRAC ECU Communication Circuit Malfunction
Always On Malfunction In TRAC ECU & TRAC Indicator Light (GS300)
Always On (6) ABS/TRAC ECU & TRAC ECU Malfunction (Except GS300)
(1) On LS400, and 1997 SC300 and SC400.
(2) On GS300.
(3) On GS300, TRAC OFF indicator light or TRAC indicator light will illuminate if malfunction is detected by ECU.
(4) On GS300, TRAC indicator light will no illuminate if malfunction is detected by ECU.
(5) When malfunction is no longer detected, DTC will erase automatically.
(6) TRAC OFF indicator light will illuminate if malfunction is detected by ECU
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.

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