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 MANUALSTOYOTA2012PRIUS FIVEREPAIR AND DIAGNOSISRESTRAINTSRESTRAINTS CONTROL SYSTEMSPRE-COLLISION SYSTEM (EXCEPT PLUG-IN) (DIAGNOSTIC CODES & CIRCUIT TESTS)PRE-COLLISION SYSTEMDTC U1119: LOST COMMUNICATION WITH OBJECT RECOGNITION ECU (CAN)INSPECTION PROCEDURE
2012 Toyota Prius Five
Inspection Procedure
2012 Toyota Prius FiveSECTION Inspection Procedure
HINT:
This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .
RENDER: 1.0x
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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.