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.
2006 Infiniti Q45FACTORY OEM SERVICE PROCEDURE
Steering Control System
- Without Rear Active Steer
- Precautions
- Electrically Controlled Power Steering System
- Trouble Diagnosis
- Trouble Diagnosis For System
- Trouble Diagnosis For Symptoms
- Control Unit
- With Rear Active Steer
- Precautions
- Electrically Controlled Power Steering
- Rear Active Steer System
- Trouble Diagnosis
- Trouble Diagnosis For System
- DTC C1900, C1901, C1905, C1906, C1907, C1908, C1922, C1927, C1928 Control Unit
- DTC C1925 Ad Converter
- DTC C1902, C1903, C1904, C1910, C1913 Motor Output
- DTC C1909 Control Unit
- DTC C1911, C1912 Motor Voltage
- DTC C1914, C1915, C1916, C1917, C1918 RR St Angle Sensor
- DTC C1919 Vehicle Speed Sen
- DTC C1920, C1923, C1924, C1926 Steering Angle Sen
- DTC C1921 Eng Rev Signal
- DTC C1929 VDC
- DTC U1000 Can Comm
- DTC U1010 Control Unit (Can)
- RAS Actuator Assembly
- Power Steering Solenoid Valve
- Stop Lamp Switch
- Component Inspection
- Trouble Diagnosis For Symptoms
- Control Unit
- Rear Active Steer
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.