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Home >> Toyota >> 2017 >> Prius Prime Plus >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Key System (Keyless Start) - Diagnostic Codes & Symptom Tests >> SMART KEY SYSTEM (for Start Function) >> DTC U0100: Lost Communication with ECM / PCM; DTC U0103: Lost Communication with Gear Shift Module "A"; DTC U0129: Lost Communication with Skid Control ECU; DTC U0140: Lost Communication with Main Body ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter; DTC U0164: Lost Communication with A/C ECU; DTC U0293: Lost Communication with Hybrid Vehicle Control System; DTC U1117: Lost Communication with Accessory Gateway; DTC U1135: Lost Communication with Plug-in Control Module [09/2016 - ] >> Description
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DTC U0100: Lost Communication with ECM / PCM; DTC U0103: Lost Communication with Gear Shift Module "A"; DTC U0129: Lost Communication with Skid Control ECU; DTC U0140: Lost Communication with Main Body ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter; DTC U0164: Lost Communication with A/C ECU; DTC U0293: Lost Communication with Hybrid Vehicle Control System; DTC U1117: Lost Communication with Accessory Gateway; DTC U1135: Lost Communication with Plug-in Control Module [09/2016 - ]: Description

These DTCs are stored when there is a CAN communication malfunction between the ECM, certification ECU (smart key ECU assembly), hybrid vehicle control ECU, main body ECU (multiplex network body ECU), combination meter assembly, air conditioning amplifier assembly or electric vehicle charger assembly, and data from the option connector (bus buffer ECU) cannot be received.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U0100 Lost Communication with ECM / PCM CAN communication error between certification ECU (smart key ECU assembly) and ECM (1-trip detection logic*) ECM DTC Output Confirmation Operation: 
  1. Turn the power switch on (IG) and wait at least 10 seconds.
U0103 Lost Communication with Gear Shift Module "A" CAN communication error between the certification ECU (smart key ECU assembly) and hybrid vehicle control ECU (1-trip detection logic*) Hybrid vehicle control ECU DTC Output Confirmation Operation: 
  1. Always
U0129 Lost Communication with Skid Control ECU CAN communication error between the certification ECU (smart key ECU assembly) and skid control ECU (brake booster with master cylinder assembly) (1-trip detection logic*) Skid Control ECU (brake Booster with Master Cylinder Assembly) DTC Output Confirmation Operation: 
  1. Always
U0140 Lost Communication with Main Body ECU CAN communication malfunction between certification ECU (smart key ECU assembly) and main body ECU (multiplex network body ECU) (1-trip detection logic*) Main body ECU (multiplex network body ECU) DTC Output Confirmation Operation: 
  1. Always
U0142 Lost Communication with Main Body ECU CAN communication malfunction between certification ECU (smart key ECU assembly) and main body ECU (multiplex network body ECU) (1-trip detection logic*) Main body ECU (multiplex network body ECU) DTC Output Confirmation Operation: 
  1. Always
U0155 Lost Communication with Combination Meter CAN communication malfunction between certification ECU (smart key ECU assembly) and combination meter assembly (1-trip detection logic*) Combination meter assembly DTC Output Confirmation Operation: 
  1. Turn the power switch on (IG) and wait at least 10 seconds.
U0164 Lost Communication with A/C ECU CAN communication malfunction between certification ECU (smart key ECU assembly) and air conditioning amplifier assembly (1-trip detection logic*) Air conditioning amplifier assembly DTC Output Confirmation Operation: 
  1. Turn the power switch on (IG) and wait at least 10 seconds.
U0293 Lost Communication with Hybrid Vehicle Control System CAN communication error between certification ECU (smart key ECU) and hybrid vehicle control ECU (1-trip detection logic*) Hybrid vehicle control ECU DTC Output Confirmation Operation: 
  1. Turn the power switch on (IG) and wait at least 10 seconds.
U1117 Lost Communication with Accessory Gateway Data from the option connector (bus buffer ECU) cannot be received
  • Connector and branch wire of sub bus 2 of option connector (bus buffer ECU)
  • Internal malfunction of option connector (bus buffer ECU)
 DTC Output Confirmation Operation: 
  1. Turn the power switch on (IG) and wait at least 10 seconds.
U1135 Lost Communication with Plug-in Control Module CAN communication malfunction between certification ECU (smart key ECU assembly) and electric vehicle charger assembly (1-trip detection logic*) Electric vehicle charger assembly DTC Output Confirmation Operation: 
  1. Turn the power switch on (IG) and wait at least 10 seconds.
  1. *: Only detected while a malfunction is present.
VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

DTC Code Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
U0100 There is no effect on vehicle behavior. -
U0103 Hybrid control system does not start. -
U0129 Hybrid control system does not start. -
U0140
U0142
  • Doors cannot be locked or unlocked.
  • The warning (wireless buzzer) does not sound.
 -
U0155
  • The warning (meter buzzer) does not sound and no warning messages displayed on the multi-information display.
  • There is no effect on vehicle behavior.
  
U0164 Remote air conditioning system does not operate. -
U0293 The warning (meter buzzer) does not sound and no warning messages displayed on the multi-information display. -
U1117 The hybrid control system cannot be started using the wireless remote control function. -
U1135 Plug-in charge control system does not operate. -
RELATED DATA LIST AND ACTIVE TEST ITEMS

DTC No. Data List and Active Test
U0100
U0103
U0129
U0140
U0142
U0155
U0164
U0293
U1117
U1135		 -
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