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 Scion iQFACTORY OEM SERVICE PROCEDURE
Power Steering System
POWER STEERING SYSTEM DTC IDENTIFICATION
| DTC Code | Description |
|---|---|
| C1511 | Torque Sensor 1 Malfunction |
| C1512 | Torque Sensor 2 Malfunction |
| C1513 | Torque Sensor Deviation Excessive |
| C1514 | Torque Sensor Power Supply Voltage Malfunction |
| C1521 | Short in Motor Circuit |
| C1524 | Motor Terminal Voltage Malfunction |
| C1531 | ECU Malfunction |
| C1532 | ECU Malfunction |
| C1533 | Temperature Sensor Circuit is Low or High |
| C1534/ | EEPROM Malfunction |
| C1541 | Vehicle Speed Signal |
| C1551 | IG Power Supply Voltage Malfunction |
| C1552 | PIG Power Supply Voltage Malfunction |
| C1554 | Power Supply Relay Failure |
| C1555 | Motor Relay Welding Failure |
| C1581 | Assist Map Number Un-Writing |
| C1582 | Assist Map Number Mismatch |
| U0100 | Lost Communication with ECM/PCM "A" |
| U0129 | Lost Communication with Brake System Control Module |
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:
- • 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.