2008 Lexus LS 600hLFACTORY OEM SERVICE PROCEDURE

Skid Control Ecu: Installation

NOTE: While the battery is connected, even if the power switch is OFF, the brake control system activates when the brake pedal is depressed or the door courtesy switch turns on. Therefore during servicing of the brake system components, do not operate the brake pedal or open/ close the doors while the battery is connected.
  1. INSTALL SKID CONTROL ECU BRACKET 
    1. Install the bracket with the bolt and 2 nuts

      Torque: 8.5 N*m (87 kgf*cm, 75 in.*lbf) 

      Fig 1: Identifying Skid Control ECU Bracket With Bolt And Nuts
      G05774160Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CONNECT BRAKE FLUID RESERVOIR 
    1. Install the brake fluid reservoir with the 2 bolts

      Torque: 8.5 N*m (87 kgf*cm, 75 in.*lbf) 

      2. Fig 2: Identifying Brake Fluid Reservoir With Bolts
      G05774159Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CONNECT NO. 3 RELAY BLOCK  (See INSTALLATION  )
  4. INSTALL SKID CONTROL ECU 
    1. Connect the 2 connectors (labeled A) and press the lock levers down to lock the connectors (labeled B).
      NOTE: Make sure that the lock levers securely lock the connectors.
    2. Connect the connector.
      Fig 3: Pressing Lock Levers Down To Lock Connectors (Labeled B)
      G05774163Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Install the ECU with the 2 bolts and nut.

      Torque: 8.5 N*m (87 kgf*cm, 75 in.*lbf) 

    4. Connect the short connector for the brake stroke simulator cylinder to the bracket of the skid control ECU
      Fig 4: Locating Skid Control ECU Connector With Bolts And Nut
      G05774164Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. CONNECT NO. 1 MOTOR COOLING PIPE 
    1. Connect the No 1 motor cooling pipe with the bolt

      Torque: 13 N*m (133 kgf*cm, 10 ft.*lbf) 

      2. Fig 5: Locating No 1 Motor Cooling Pipe From Skid Control ECU Bracket And Bolt
      G05774156Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSTALL SERVICE PLUG GRIP  (See INSTALLATION ).
  7. INSTALL BATTERY SERVICE HOLE COVER  (See INSTALLATION ).
  8. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
    NOTE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected (see INITIALIZATION ).
  9. INSTALL BATTERY SERVICE HOLE COVER LH  (See INSTALLATION ).
  10. INSTALL LUGGAGE COMPARTMENT MAT SUB-ASSEMBLY  (See INSTALLATION ).
  11. CHECK AND CLEAR DTC 
    1. Check and clear the DTCs (see DTC CHECK / CLEAR  ).
  12. PERFORM LINEAR VALVE OFFSET LEARNING 
    1. When the skid control ECU is replaced, perform the linear valve offset learning (see INITIALIZATION  ).
  13. PERFORM YAW RATE SENSOR ZERO POINT CALIBRATION 
    1. Perform the yaw rate sensor zero point calibration (see CALIBRATION  ).
  14. PERFORM TEST MODE INSPECTION 
    1. Perform the test mode inspection (see TEST MODE PROCEDURE  ).
  15. INSTALL ENGINE ROOM SIDE COVER LH  (See INSTALLATION ).
  16. INSTALL V-BANK COVER SUB-ASSEMBLY  (See INSTALLATION ).
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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.