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Home >> Mazda >> 2021 >> 6 Signature >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (On-Board Diagnostic - Adaptive Front Lighting System Control Module) >> DTC U0001-88, U0100-00, U0131-00, U0140-00, U0155-00: Communication Error >> Notes

DTC U0001-88, U0100-00, U0131-00, U0140-00, U0155-00: Communication Error: Notes

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DTC U0001:88/U0100:00/U0131:00/U0140:00/U0155:00 ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE DETECTION CONDITION AND POSSIBLE CAUSE

Description U0001:88
  • Unit communication error (HS-CAN)

U0100:00
  • Communication error with PCM

U0131:00
  • Communication error with EPS control module

U0140:00
  • Communication error with front body control module (FBCM)

U0155:00
  • Communication error with instrument cluster
Detection condition
  • U0001:88
    • The AFS control module detected CAN bus communication line (HS-CAN) malfunction ten times continuously.
  • U0100:00
    • The AFS control module could not receive CAN signal from the PCM for 5 s or more.
  • U0131:00
    • The AFS control module could not receive CAN signal from the EPS control module for 5 s or more.
  • U0140:00
    • The AFS control module could not receive CAN signal from the front body control module (FBCM) for 5 s or more.
  • U0155:00
    • The AFS control module could not receive CAN signal from the instrument cluster for 5 s or more.
Fail-safe
  • U0001:88
    • The swivel actuator is moved to the center.
      • The headlight leveling actuator is stopped at the position when the malfunction is determined.
  • U0100:00
    • The swivel actuator is moved to the center.
      • The headlight leveling actuator is stopped at the position when the malfunction is determined.
  • U0131:00
    • The swivel actuator is moved to the center.
      • Control of the headlight auto leveling system is continued.
  • U0140:00
    • The swivel actuator is moved to the center.
      • The headlight leveling actuator is stopped at the position when the malfunction is determined.
  • U0155:00
    • The swivel actuator is moved to the center.
      • Control of the headlight auto leveling system is continued.
Possible cause
  • Malfunction in CAN bus communication line
  • Malfunction in CAN communication line between PCM and AFS control module
  • Malfunction in CAN communication line between EPS control module and AFS control module
  • Malfunction in CAN communication line between front body control module (FBCM) and AFS control module
  • Malfunction in CAN communication line between instrument cluster and AFS control module
System wiring diagram Not applicable
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