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 MANUALSTOYOTA2020RAV4 XLE, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 17 (CRUISE CONTROL SYSTEM (HV) - DIAGNOSTIC CODES & CIRCUIT TESTS)CRUISE CONTROL SYSTEM (FOR HV MODEL)DTC U0122-87: LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE MISSING MESSAGE [11/2018 - 08/2020]DESCRIPTION
2020 Toyota RAV4 XLE, AWD
DTC U0122-87: Lost Communication with Vehicle Dynamics Control Module Missing Message [11/2018 - 08/2020]: Description
2020 Toyota RAV4 XLE, AWDSECTION Description
WARNING: This page is about a different variant/trim than selected.
The hybrid vehicle control ECU assembly receives signals from the skid control ECU (brake booster with master cylinder assembly) via CAN communication.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U0122-87 | Lost Communication with Vehicle Dynamics Control Module Missing Message | While the power switch is on (IG) and the cruise control system is operating, signals cannot be received from the skid control ECU (brake booster with master cylinder assembly) for 2.65 seconds or more. |
|
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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.