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.
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HOMESERVICE MANUALSLEXUS2012CT 200H L4-1.8L (2ZR-FXE) HYBRIDREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONU CODE CHARTSU0122CRUISE CONTROL SYSTEM
2012 Lexus CT 200h L4-1.8L (2ZR-FXE) Hybrid
Cruise Control System
2012 Lexus CT 200h L4-1.8L (2ZR-FXE) HybridSECTION Cruise Control System
CRUISE CONTROL: CRUISE CONTROL SYSTEM: U0122: Lost Communication with Vehicle Dynamics Control Module
U0122 - Lost Communication with Vehicle Dynamics Control Module
DESCRIPTION
The vehicle speed sensors send vehicle speed signals to the brake booster with master cylinder (skid control ECU). Signals are then sent to the power management control ECU.
INSPECTION PROCEDURE
Refer to CAN Communication System How to Proceed With Troubleshooting.
PROCEDURE
1. CHECK CAN COMMUNICATION SYSTEM
(a) Connect the Techstream to the DLC3.
(b) Select "Bus Check" from the "System Select".
(c) Select "DTC" from the "Bus Check" screen, and then select "Enter".
Result:
B -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting
RENDER: 1.0x
NO RELATED
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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.