Lexus SC Model ECU Location and Removal Instructions
COMPONENTS FOR REMOVAL AND INSTALLATION:
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1. DISCONNECT NEGATIVE (-) TERMINAL CABLE FROM BATTERY.
CAUTION: Work must be started after 90 seconds from the time the ignition switch is turned to the LOCK position and the negative (-) terminal cable is disconnected from the battery.
2. REMOVE INSTRUMENT PANEL UNDER COVER.
- Remove the 2 clips.
- Disconnect the 4 clips by pulling the under cover, and remove the under cover.
3. REMOVE ECM PROTECTOR.
- Take out the front side of the floor carpet.
- Remove the 2 nuts and ECM protector.
4. REMOVE ECM.
- Remove the nut, and disconnect the ECM from the floor panel.
5. Fully loosen the bolt and disconnect the 2 ECM connectors, and remove the ECM.
6. REINSTALL ECM.
- Connect the 2 ECM connectors.
- Match the male connector correctly with the female connector, then press them together.
- Tighten the bolt.
- Make sure the connector is completely connected, by tightening the bolt until there is a clearance of less than 1 mm (0.04 in) between bottom of the male connector and end of the female connector.
- Install the ECM with the nut.
7. REINSTALL ECM PROTECTOR.
- Install the ECM protector with the 2 nuts.
- Install the floor carpet.
8. REINSTALL INSTRUMENT PANEL UNDER COVER.
- Install the under cover with the 6 clips.
9. RECONNECT NEGATIVE (-) TERMINAL CABLE FROM BATTERY.
Download a pdf of these instructions here