1994 Lexus LS 400FACTORY OEM SERVICE PROCEDURE

ECM Installation

(See COMPONENTS FOR REMOVAL AND INSTALLATIONΒ )

  1. INSTALL ECM
    1. Install the ECM with the 3 nuts.
  2. INSTALL LOWER INSTRUMENT PANEL PAD
    1. (a) Connect the 4 connectors to the ECM. (b) Install the lower instrument pad with the 5 bolts.
  3. INSTALL GLOVE COMPARTMENT
    1. (a) Connect the compartment light connector. (b) Run the wiring harness connector (for the airbag) through the compartment hole. (c) Install the compartment with the 5 clips. (d) Install the lift check arm. (e) Connect the right check arm to the compartment door. (f) Install the 2 compartment panels.
  4. INSTALL INSTRUMENT PANEL UNDER COVER
    1. (a) Install the step light to the under cover. (b) Install the under cover with the 3 clips.
  5. CONNECT NEGATIVE TERMINAL CABLE TO BATTERY
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.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ 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.