1995 Lexus LS 400FACTORY OEM SERVICE PROCEDURE

Traction Control System DTCS

TRACTION CONTROL SYSTEM DTCS

OEM Code Description
24 TRAC SUB-THROTTLE ACTUATOR CIRCUIT
25 TRAC SUB-THROTTLE VALVE
26 TRAC SUB-THROTTLE VALVE
27 TRAC SUB-THROTTLE VALVE
28 THROTTLE VALVE MOTOR DRIVER
29 THROTTLE VALVE MOTOR DRIVER
31 SPEED SENSOR CIRCUIT
32 SPEED SENSOR CIRCUIT
33 SPEED SENSOR CIRCUIT
34 SPEED SENSOR CIRCUIT
41 IG POWER SUPPLY CIRCUIT
43 ABS CONTROL SYSTEM MALFUNCTION
44 NE SIGNAL CIRCUIT MALFUNCTION
45 MAIN THROTTLE POSITION SENSOR CIRCUIT
46 MAIN THROTTLE POSITION SENSOR CIRCUIT
47 SUB-THROTTLE POSITION SENSOR CIRCUIT
48 SUB-THROTTLE POSITION SENSOR CIRCUIT
49 ENGINE COMMUNICATION CIRCUIT
51 ENGINE MALFUNCTION DETECTION CIRCUIT
52 BRAKE FLUID LEVEL WARNING SWITCH CIRCUIT
53 ECM COMMUNICATION CIRCUIT MALFUNCTION
54 TRAC MOTOR RELAY CIRCUIT
55 TRAC MOTOR RELAY CIRCUIT
56 TRAC PUMP MOTOR MALFUNCTION
61 ABS ECU & TRAC ECU COMMUNICATION CIRCUIT MALFUNCTION
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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