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.
2016 Infiniti QX50 AWDFACTORY OEM SERVICE PROCEDURE
Intelligent Cruise Control System DTCS
INTELLIGENT CRUISE CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| DTC C1A00 | INTELLIGENT CRUISE CONTROL (ICC) SENSOR MALFUNCTION |
| DTC C1A01, C1A02 | INTELLIGENT CRUISE CONTROL (ICC) SENSOR POWER SUPPLY CIRCUIT 1 / CIRCUIT 2 |
| DTC C1A03 | VEHICLE SPEED SIGNAL INCONSISTENT |
| DTC C1A04 | ABS/TCS/VDC SYSTEM MALFUNCTION |
| DTC C1A05 | BRAKE SWITCH / STOP LAMP SWITCH BOTH SIGNAL "ON" STATUS |
| DTC C1A06 | INTELLIGENT CRUISE CONTROL (ICC) STEERING SWITCH SIGNAL MALFUNCTION |
| DTC C1A08 | BRAKE PRESSURE SENSOR MALFUNCTION |
| DTC C1A09 | BRAKE BOOSTER SOLENOID MALFUNCTION |
| DTC C1A10 | BRAKE BOOSTER RELEASE SWITCH SIGNAL INCONSISTENT |
| DTC C1A11 | BRAKE BOOSTER PRESSURE CONTROL MALFUNCTION |
| DTC C1A12 | LASER BEAM OFF CENTER |
| DTC C1A13 | STOP LAMP RELAY DRIVE SIGNAL |
| DTC C1A14 | ECM MALFUNCTION |
| DTC C1A15 | GEAR POSITION SIGNAL MISMATCH |
| DTC C1A16 | INTELLIGENT CRUISE CONTROL (ICC) SENSOR BODY WINDOW CONTAMINATION / FOREIGN MATERIALS |
| DTC C1A18 | LASER BEAM AIMING ADJUSTMENT INTERRUPTED OR NOT PERFORMED |
| DTC C1A21 | UNIT HIGH TEMP |
| DTC C1A22 | BRAKE BOOSTER CONTROL UNIT (BCU) CIRCUIT |
| DTC C1A24 | NP RANGE SIGNAL INCONSISTENT |
| DTC C1A28, C1A29 | BRAKE BOOSTER CONTROL UNIT (BCU) POWER SUPPLY CIRCUIT / CIRCUIT 2 |
| DTC C1A30 | BRAKE BOOSTER CONTROL UNIT (BCU) CAN COMMUNICATION CIRCUIT |
| DTC C1A31 | BRAKE BOOSTER CONTROL UNIT (BCU) INTERNAL MALFUNCTION |
| DTC C1A32 | INTELLIGENT BRAKE ASSIST (IBA) SYSTEM MALFUNCTION |
| DTC C1A33 | CAN COMMUNICATION SIGNAL TRANSMISSION ERROR |
| DTC C1A34 | COMMAND SIGNAL ERROR |
| DTC C1A39 | STEERING ANGLE SENSOR MALFUNCTION |
| DTC C1A40 | INTELLIGENT BRAKE ASSIST (IBA) OFF SWITCH CIRCUIT |
| DTC U0121 | DTC U0121: VEHICLE DYNAMIC CONTROL (VDC) CAN CIRCUIT 2 ABS ACTUATOR ERROR SIGNAL DETECTED |
| DTC U0126 | STEERING ANGLE SENSOR CAN CIRCUIT 1 ERROR SIGNAL DETECTED |
| DTC U0129 | BRAKE BOOSTER CONTROL UNIT (BCU) CAN CIRCUIT 2 ERROR SIGNAL DETECTED |
| DTC U0401 | ECM CAN CIRCUIT 1 ERROR SIGNAL DETECTED |
| DTC U0402 | TCM CAN COMMUNICATION CIRCUIT 1 ERROR SIGNAL |
| DTC U0415 | VEHICLE DYNAMIC CONTROL (VDC) CAN CIRCUIT 1 ABS ACTUATOR ERROR SIGNAL DETECTED |
| DTC U0418 | BRAKE BOOSTER CONTROL UNIT (BCU) CAN CIRCUIT 1 ERROR SIGNAL DETECTED |
| DTC U0428 | STEERING ANGLE SENSOR CAN CIRCUIT 2 ERROR SIGNAL DETECTED |
| DTC U1000 | CAN COMMUNICATION SIGNAL NOT TRANSMITTED OR RECEIVED |
| DTC U1010 | CAN CONTROLLER MALFUNCTION |
Factory Service Tools
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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.