Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1997 Lexus SC 400FACTORY OEM SERVICE PROCEDURE
Retrieving Codes
WARNING: This page is about a different car, the 1997 Lexus SC 300. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition on. Turn cruise main switch on. If CRUISE indicator light comes on, leave ignition on and go to next step. If CRUISE indicator light does not come on, check cruise indicator light circuit. See TEST 12 under CIRCUIT TESTS .
- To retrieve codes, turn cruise main switch off. Connect Jumper Wire (09843-18020) between terminals Tc and E1 of Data Link Connector (DLC) No. 2, located under left side of instrument panel. See Figure. Observe CRUISE indicator light to see if any codes are displayed. See DIAGNOSTIC TROUBLE CODE (DTC) DEFINITION table.
- CRUISE Light Does Not Come On
See TEST 11 under CIRCUIT TESTS . - CRUISE Light Flashes Steadily
No codes set ("normal" code). - CRUISE Light Flashes Codes(s)
Go to appropriate code under DTC TESTS .
- CRUISE Light Does Not Come On
When finished, disconnect jumper wire and turn ignition off.
Factory Service Tools
Use the Manual With the Right Hardware
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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.