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Home >> Toyota >> 2019 >> Yaris LE >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Exterior Lights >> Automatic Headlight Beam Level Control System - Diagnostics Codes >> Automatic Headlight Beam Level Control System >> DTC U0001-88: High Speed CAN Communication Bus Bus off; DTC U0100-00: Lost Communication With ECM/PCM "A"; DTC U0140-00: Lost Communication With Body Control Module; DTC U0155-00: Lost Communication With Instrument Panel Cluster (IPC) Control Module [08/2019 - ] >> Contents
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DTC U0001-88: High Speed CAN Communication Bus Bus off; DTC U0100-00: Lost Communication With ECM/PCM "A"; DTC U0140-00: Lost Communication With Body Control Module; DTC U0155-00: Lost Communication With Instrument Panel Cluster (IPC) Control Module [08/2019 - ]: Contents

DTC No. Detection Item DTC Detection Condition Warning Indicate Memory Fail-safe Operation Note
U000188 High Speed CAN Communication Bus Bus off Unit communication error (HS-CAN) Flash (Pattern 1) (w/ Height Control Sensor)
On (w/o Height Control Sensor)		 DTC Stored Applicable
  • Drive cycle: Not applicable
  • Self test type: CMDTC self test
U010000 Lost Communication With ECM/PCM "A" Communication error with PCM Flash (Pattern 1) (w/ Height Control Sensor)
On (w/o Height Control Sensor)		 DTC Stored Applicable
  • Drive cycle: Not applicable
  • Self test type: CMDTC self test
U014000 Lost Communication With Body Control Module Communication error with main body ECU Flash (Pattern 1) (w/ Height Control Sensor)
On (w/o Height Control Sensor)		 DTC Stored Applicable
  • Drive cycle: Not applicable
  • Self test type: CMDTC self test
U015500 Lost Communication With Instrument Panel Cluster (IPC) Control Module Communication error with combination meter Flash (Pattern 1) (w/ Height Control Sensor)
On (w/o Height Control Sensor)		 DTC Stored Applicable
  • Drive cycle: Not applicable
  • Self test type: CMDTC self test
DTC Detection Condition U000188 
  • Unit communication error (HS-CAN)

U010000 
  • Communication error with PCM

U014000 
  • Communication error with main body ECU

U015500 
  • Communication error with combination meter
U000188 
  • Headlight leveling ECU detected the CAN bus communication line (HS-CAN) malfunction 10 times continuously.

U010000 
  • Headlight leveling ECU could not receive the CAN signal from the PCM for 5 s or more.

U014000 
  • Headlight leveling ECU could not receive the CAN signal from the main body ECU for 5 s or more.

U015500 
  • Headlight leveling ECU could not receive the CAN signal from the combination meter for 5 s or more.
Fail-safe Operation U000188 
  • The headlight leveling actuator is stopped at the position when the malfunction is determined.

U010000 
  • The headlight leveling actuator is stopped at the position when the malfunction is determined.

U014000 
  • The headlight leveling actuator is stopped at the position when the malfunction is determined.

U015500 
  • Control of the headlight auto leveling system is continued.
Trouble Area
  • Malfunction in CAN bus communication line
  • Malfunction in CAN communication line between PCM and headlight leveling ECU
  • Malfunction in CAN communication line between main body ECU and headlight leveling ECU
  • Malfunction in CAN communication line between combination meter and headlight leveling ECU
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