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.
2012 Hyundai Equus SignatureFACTORY OEM SERVICE PROCEDURE
Smart Cruise Control DTCS
DIAGNOSTIC TROUBLE CODES DESCRIPTIONS
| DTC | Description |
|---|---|
| DTC C1101 | Battery Voltage High |
| DTC C1102 | Battery Voltage Low |
| DTC C1202 | Wheel Speed Sensor Front-LH Invalid no Signal |
| DTC C1205 | Wheel Speed Sensor Front-RH Invalid no Signal |
| DTC C1208 | Wheel Speed Sensor Rear-LH Invalid no Signal |
| DTC C1211 | Wheel Speed Sensor Rear-RH Invalid no Signal |
| DTC C1260 | Steering Angle Sensor Circuit-Signal |
| DTC C1283 | Yaw Rate & Lateral G Sensor-Signal |
| DTC C1360 | ESP Irreversible Error |
| DTC C1603 | ECU Internal Thermal & Voltage Error |
| DTC C1604 | ECU Hardware Error |
| DTC C1605 | CAN Hardware Error |
| DTC C1606 | ECU Software Error |
| DTC C1611 | CAN Time-out EMS |
| DTC C1612 | CAN Time-out TCU |
| DTC C1613 | CAN signal error EMS |
| DTC C1616 | CAN Bus Off |
| DTC C1617 | EMS Invalid Engine Speed |
| DTC C1620 | alignment failed |
| DTC C1622 | EMS invalid vehicle speed |
| DTC C1623 | CAN Time-out Steering Angle Sensor |
| DTC C1625 | CAN Time-out ABS ESP |
| DTC C1628 | CAN Timeout - Cluster |
| DTC C1629 | Cluster Invalid Counter |
| DTC C1632 | Cluster Control Switch Fail |
| DTC C1633 | Cluster Invalid Displayed Speed |
| DTC C1634 | Speed Correction Signal Error |
| DTC C1635 | TCS Invalid Counter |
| DTC C1636 | TCS Invalid ACCEL_REF_ACC |
| DTC C1637 | TCS Invalid a Basis |
| DTC C1638 | ACC communication error |
| DTC C1642 | CAN signal error ESC |
| DTC C1646 | CAN signal error TCU |
| DTC C1680 | VSM EBS Error |
| DTC C1702 | Variant Coding Error |
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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