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Home >> Toyota >> 2019 >> Yaris LE >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (12 Of 13) >> SFI System >> DTC U0073-00: Control Module Communication Bus "A" Off; DTC U0101-00: Lost Communication with TCM; DTC U0121-00: Lost Communication With Anti-Lock Brake System (ABS) Control Module; DTC U0131-00: Lost Communication With Power Steering Control Module; DTC U0140-00: Lost Communication With Body Control Module; DTC U0151-00: Lost Communication With Restraints Control Module; DTC U0155-00: Lost Communication With Instrument Panel Cluster (IPC) Control Module; DTC U0214-00: Lost Communication With Remote Function Actuation; DTC U0235-00: Lost Communication With Cruise Control Front Distance Range Sensor [07/2015 - ] >> Contents
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DTC U0073-00: Control Module Communication Bus "A" Off; DTC U0101-00: Lost Communication with TCM; DTC U0121-00: Lost Communication With Anti-Lock Brake System (ABS) Control Module; DTC U0131-00: Lost Communication With Power Steering Control Module; DTC U0140-00: Lost Communication With Body Control Module; DTC U0151-00: Lost Communication With Restraints Control Module; DTC U0155-00: Lost Communication With Instrument Panel Cluster (IPC) Control Module; DTC U0214-00: Lost Communication With Remote Function Actuation; DTC U0235-00: Lost Communication With Cruise Control Front Distance Range Sensor [07/2015 - ]: Contents

DTC No. Detection Item DTC Detection Condition Warning Indicate Memory Fail-safe Operation Note
U007300 Control Module Communication Bus "A" Off CAN system communication error (HS CAN)
  • Check engine light: OFF
  • Master warning light: OFF
  • Charging system warning light: OFF
  • Engine oil warning light: OFF
  • Wrench warning indicator light: OFF
DTC stored Not applicable
  • Drive cycle: 1
  • Monitor item: Other
  • Self test type: CMDTC self test, KOEO self test, KOER self test
U010100 Lost Communication with TCM CAN communication: communication error to TCM*
*: ATX
  • Check engine light: ON
  • Master warning light: OFF
  • Charging system warning light: OFF
  • Engine oil warning light: OFF
  • Wrench warning indicator light: OFF
DTC stored Applicable
  • Drive cycle: 1
  • Monitor item: Other
  • Self test type: CMDTC self test, KOEO self test, KOER self test
U012100 Lost Communication With Anti-Lock Brake System (ABS) Control Module CAN communication: communication error to ABS HU/CM or DSC HU/CM
  • Check engine light: ON
  • Master warning light: OFF
  • Charging system warning light: OFF
  • Engine oil warning light: OFF
  • Wrench warning indicator light: OFF
DTC stored Applicable
  • Drive cycle: 1
  • Monitor item: Other
  • Self test type: CMDTC self test, KOEO self test, KOER self test
U013100 Lost Communication With Power Steering Control Module CAN communication: communication error to power steering ECU
  • Check engine light: OFF
  • Master warning light: OFF
  • Charging system warning light: OFF
  • Engine oil warning light: OFF
  • Wrench warning indicator light: OFF
DTC stored Applicable
  • Drive cycle: 1
  • Monitor item: Other
  • Self test type: CMDTC self test, KOEO self test, KOER self test
U014000 Lost Communication With Body Control Module CAN communication: communication error to main body ECU
  • Check engine light: OFF
  • Master warning light: OFF
  • Charging system warning light: OFF
  • Engine oil warning light: OFF
  • Wrench warning indicator light: OFF
DTC stored Applicable
  • Drive cycle: 1
  • Monitor item: Other
  • Self test type: CMDTC self test, KOEO self test, KOER self test
U015100 Lost Communication With Restraints Control Module CAN communication: communication error to center airbag sensor assembly
  • Check engine light: OFF
  • Master warning light: OFF
  • Charging system warning light: OFF
  • Engine oil warning light: OFF
  • Wrench warning indicator light: OFF
DTC stored Applicable
  • Drive cycle: 1
  • Monitor item: Other
  • Self test type: CMDTC self test, KOEO self test, KOER self test
U015500 Lost Communication With Instrument Panel Cluster (IPC) Control Module CAN communication: communication error to combination meter
  • Check engine light: ON
  • Master warning light: OFF
  • Charging system warning light: OFF
  • Engine oil warning light: OFF
  • Wrench warning indicator light: OFF
DTC stored Applicable
  • Drive cycle: 1
  • Monitor item: Other
  • Self test type: CMDTC self test, KOEO self test, KOER self test
U021400 Lost Communication With Remote Function Actuation CAN communication: communication error to engine stop and start ECU
  • Check engine light: OFF
  • Master warning light: OFF
  • Charging system warning light: OFF
  • Engine oil warning light: OFF
  • Wrench warning indicator light: OFF
DTC stored Applicable
  • Drive cycle: 1
  • Monitor item: Other
  • Self test type: CMDTC self test, KOEO self test, KOER self test
U023500 Lost Communication With Cruise Control Front Distance Range Sensor CAN communication: communication error to laser sensor
  • Check engine light: OFF
  • Master warning light: OFF
  • Charging system warning light: OFF
  • Engine oil warning light: OFF
  • Wrench warning indicator light: OFF
DTC stored Applicable
  • Drive cycle: 1
  • Monitor item: Other
  • Self test type: CMDTC self test, KOEO self test, KOER self test
DTC DETECTION CONDITION U007300
CAN system communication error (HS CAN)
  • Malfunction in CAN bus communication line.
Diagnostic support note 
  • This is a continuous monitor (other).
  • The check engine light does not illuminate.
  • FREEZE FRAME DATA (Mode 02) is not available.
  • Snapshot data is available.
  • DTC is stored in the ECM memory.
FAIL-SAFE OPERATION Not applicable
TROUBLE AREA
  • CAN bus communication line malfunction
  • ECM malfunction
SYSTEM WIRING DIAGRAM Not applicable
DTC DETECTION CONDITION U010100
CAN communication: communication error to TCM
  • Communication error between the ECM and TCM continues for 5 s or more.
Diagnostic support note 
  • This is a continuous monitor (other).
  • The check engine light illuminates if the ECM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA (Mode 02)/Snapshot data is available.
  • DTC is stored in the ECM memory.
FAIL-SAFE OPERATION
  • Controls the turbine rotation signal at 0.
  • Inhibits the AT torque reduction request.
TROUBLE AREA HINT: 
  • During malfunction diagnosis, first verify the malfunction detection of DTC U007400 or U011500 for the TCM.
  • CAN communication line malfunction between ECM and TCM
  • TCM malfunction
  • ECM malfunction
SYSTEM WIRING DIAGRAM Not applicable
DTC DETECTION CONDITION U012100
CAN communication: communication error to ABS HU/CM or DSC HU/CM
  • Communication error between the ECM and DSC HU/CM continues for 5 s or more. (with DSC)
  • Communication error between the ECM and ABS HU/CM continues for 5 s or more. (without DSC)
Diagnostic support note 
  • This is a continuous monitor (other).
  • The check engine light illuminates if the ECM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA (Mode 02)/Snapshot data is available.
  • DTC is stored in the ECM memory.
FAIL-SAFE OPERATION
  • Inhibits the DSC control. (with DSC)
  • Inhibits the ABS control. (without DSC)
TROUBLE AREA Vehicles with DSC 
  • CAN communication line malfunction between ECM and DSC HU/CM
  • DSC HU/CM malfunction
  • ECM malfunction

Vehicles without DSC 
  • CAN communication line malfunction between ECM and ABS HU/CM
  • ABS HU/CM malfunction
  • ECM malfunction
SYSTEM WIRING DIAGRAM Not applicable
DTC DETECTION CONDITION U013100
CAN communication: communication error to power steering ECU
  • Communication error between the ECM and power steering ECU continues for 5 s or more.
Diagnostic support note 
  • This is a continuous monitor (other).
  • The check engine light does not illuminate.
  • FREEZE FRAME DATA (Mode 02) is not available.
  • Snapshot data is available.
  • DTC is stored in the ECM memory.
FAIL-SAFE OPERATION Not applicable
TROUBLE AREA
  • CAN communication line malfunction between ECM and power steering ECU
  • Power steering ECU malfunction
  • ECM malfunction
SYSTEM WIRING DIAGRAM Not applicable
DTC DETECTION CONDITION U014000
CAN communication: communication error to main body ECU
  • Communication error between the ECM and main body ECU continues for 5 s or more.
Diagnostic support note 
  • This is a continuous monitor (other).
  • The check engine light does not illuminate.
  • FREEZE FRAME DATA (Mode 02) is not available.
  • Snapshot data is available.
  • DTC is stored in the ECM memory.
FAIL-SAFE OPERATION Not applicable
TROUBLE AREA
  • CAN communication line malfunction between ECM and main body ECU
  • Main body ECU malfunction
  • ECM malfunction
SYSTEM WIRING DIAGRAM Not applicable
DTC DETECTION CONDITION U015100
CAN communication: communication error to center airbag sensor assembly
  • Communication error between the ECM and center airbag sensor assembly continues for 5 s or more.
Diagnostic support note 
  • This is a continuous monitor (other).
  • The check engine light does not illuminate.
  • FREEZE FRAME DATA (Mode 02) is not available.
  • Snapshot data is available.
  • DTC is stored in the ECM memory.
FAIL-SAFE OPERATION Not applicable
TROUBLE AREA
  • CAN communication line malfunction between ECM and center airbag sensor assembly
  • center airbag sensor assembly malfunction
  • ECM malfunction
SYSTEM WIRING DIAGRAM Not applicable
DTC DETECTION CONDITION U015500
CAN communication: communication error to combination meter
  • Communication error between the ECM and combination meter continues for 5 s or more.
Diagnostic support note 
  • This is a continuous monitor (other).
  • The check engine light illuminates if the ECM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA (Mode 02) is not available.
  • Snapshot data is available.
  • DTC is stored in the ECM memory.
FAIL-SAFE OPERATION Not applicable
TROUBLE AREA
  • CAN communication line malfunction between ECM and combination meter
  • Combination meter malfunction
  • ECM malfunction
SYSTEM WIRING DIAGRAM Not applicable
DTC DETECTION CONDITION U021400
CAN communication: communication error to engine stop and start ECU
  • Communication error between the ECM and engine stop and start ECU continues for 5 s or more.
Diagnostic support note 
  • This is a continuous monitor (other).
  • The check engine light does not illuminate.
  • FREEZE FRAME DATA (Mode 02) is not available.
  • Snapshot data is available.
  • DTC is stored in the ECM memory.
FAIL-SAFE OPERATION Not applicable
TROUBLE AREA
  • CAN communication line malfunction between ECM and engine stop and start ECU
  • Engine stop and start ECU malfunction
  • ECM malfunction
SYSTEM WIRING DIAGRAM Not applicable
DTC DETECTION CONDITION U023500
CAN communication: communication error to laser sensor
  • Communication error between the ECM and laser sensor continues for 5 s or more.
Diagnostic support note 
  • This is a continuous monitor (other).
  • The check engine light does not illuminate.
  • FREEZE FRAME DATA (Mode 02) is not available.
  • Snapshot data is available.
  • DTC is stored in the ECM memory.
FAIL-SAFE OPERATION
  • The smart city brake support function is cancelled.
TROUBLE AREA
  • CAN communication line malfunction between ECM and laser sensor
  • Laser sensor malfunction
  • ECM malfunction
SYSTEM WIRING DIAGRAM Not applicable