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 MANUALSTOYOTA2018PRIUS TWO ECOREPAIR AND DIAGNOSISHYBRID/ELECTRIC POWERTRAINTESTING AND DIAGNOSISHYBRID CONTROL SYSTEM (LITHIUM-ION) - DIAGNOSTIC CODES (4 OF 4) & CIRCUIT TESTS
2018 Toyota Prius Two Eco
Hybrid Control System (Lithium-Ion) - Diagnostic Codes (4 Of 4) & Circuit Tests
2018 Toyota Prius Two EcoSECTION Hybrid Control System (Lithium-Ion) - Diagnostic Codes (4 Of 4) & Circuit Tests
- HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY)
- DTC P321E-9F: Motor/Generator Shutdown Signal Stuck Off [11/2015 - ]
- DTC P33B9-9F: Motor/Generator Shutdown Signal (Hybrid/EV Side) Stuck Off [11/2015 - ]
- DTC P33BF-9F: Motor/Generator Shutdown Signal (MG Side) Stuck Off [11/2015 - ]
- DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0110-87: Lost Communication with Drive Motor Control Module "A" Missing Message; DTC U0122-87: Lost Communication with Vehicle Dynamics Control Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0140-00: Lost Communication with Body Control Module (Sub) Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1104-87: Lost Communication with Driving Support ECU Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (Secondary CAN Line) Missing Message; DTC U1175-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" (Powertrain Bus) Missing Message [11/2015 - 11/2017]
- DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0104-87: Lost Communication with Cruise Control Module; DTC U0110-87: Lost Communication with Drive Motor Control Module "A" Missing Message; DTC U0122-87: Lost Communication with Vehicle Dynamics Control Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0140-00: Lost Communication with Body Control Module (Sub) Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (Secondary CAN Line) Missing Message; DTC U1175-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" (Powertrain Bus) Missing Message [11/2017 - 12/2018]
- DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0104-87: Lost Communication with Cruise Control Module; DTC U0110-87: Lost Communication with Drive Motor Control Module "A" Missing Message; DTC U0122-87: Lost Communication with Vehicle Dynamics Control Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0140-00: Lost Communication with Body Control Module (Sub) Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (Secondary CAN Line) Missing Message; DTC U1175-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" (Powertrain Bus) Missing Message [12/2018 - ]
- DTC U0111-87: Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message [11/2015 - ]
- DTC U0424-81: HVAC Control Module to Hybrid Powertrain Control Module Invalid Serial Data Received [11/2015 - ]
- Brake Override System [11/2015 - 12/2018]
- Brake Override System [12/2018 - 08/2019]
- Brake Override System [08/2019 - ]
- Pattern Select Switch EV Mode Circuit [11/2015 - ]
- Drive Mode Select Switch Circuit [11/2015 - ]
- Drive Start Control System [11/2015 - 12/2018]
- Drive Start Control [12/2018 - 08/2019]
- Drive Start Control [08/2019 - ]
- ECU Power Source Circuit [11/2015 - ]
- Motor Resolver Circuit [11/2015 - ]
- Motor High-voltage Circuit [11/2015 - 12/2018]
- Motor High-voltage Circuit [12/2018 - ]
- Generator Resolver Circuit [11/2015 - ]
- Generator High-voltage Circuit [11/2015 - 12/2018]
- Generator High-voltage Circuit [12/2018 - ]
- Shut Down Signal Circuit [11/2015 - 12/2018]
- Shut Down Signal Circuit [12/2018 - ]
- Inverter Low-voltage Circuit [11/2015 - 12/2018]
- Inverter Low-voltage Circuit [12/2018 - ]
- HV Battery High-voltage Line Circuit [11/2015 - ]
- Cooling System [11/2015 - ]
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.