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
Section 11 (Cruise Control System)
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.
- Description
- Operation
- Electrical Component Locations
- Adjustments
- Trouble Shooting
- Self-Diagnostic System
- DTC Tests
- Notes
- DTC Test 11 Or 13: Actuator Motor Circuit
- DTC Test 11 Or 15: Actuator Motor Circuit
- DTC Test 12: Actuator Magnetic Clutch Circuit
- DTC Test 13: Actuator Position Sensor Circuit
- DTC Test 14: Actuator Mechanical Malfunction
- DTC Test 21 Or 23: Speed Sensor Circuit
- DTC Test 32: Cruise Control Switch Circuit
- DTC Test 41: Cruise Control Ecu
- DTC Test 51: Idle Signal Circuit
- Checking System Operation
- Circuit Testing
- Notes
- Input Signal Circuits
- Test 1: Stoplight Switch Circuit
- Test 2: Idle Switch Circuit
- Test 3: Electronic-Controlled A/T Communication Circuit
- Test 5: Parking Brake Switch Circuit
- Test 6: Neutral Start Switch Circuit
- Test 7: Clutch Switch Circuit
- Test 8: Ecu Power Source Circuit
- Test 9: Back-Up Power Source Circuit
- Test 10: Cruise Control Main Switch Circuit
- Test 11: Diagnostic Connector Circuit
- Test 12: Indicator Light Circuit
- Pin Voltage Tests
- Notes
- Cruise Control
- Terminal No. 2 & Ground
- Terminal No. 7 & Ground
- Terminal No. 8 & Ground
- Terminal No. 9 & Ground
- Terminal No. 10 & Ground
- Terminal No. 11 & Ground
- Terminal No. 12 & Ground
- Terminal No. 13 & Ground
- Terminal No. 14 & Ground
- Terminal No. 15 & Ground
- Terminal No. 16 & Ground
- Terminal No. 18 & Ground
- Terminal No. 19 & Ground
- Terminal No. 20 & Ground
- Terminal No. 21 & Ground
- Terminal No. 22 & Ground
- Terminal No. 26 & Ground
- Removal & Installation
- Wiring Diagrams
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.
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