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Home >> Mazda >> 2024 >> 3 S >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> On-Board Diagnostic - Vehicle Control Module (1 Of 2) >> DTC B14F4-87: Communication Error With Parking Assist Unit (Ultrasonic) Related Module

DTC B14F4-87: Communication Error With Parking Assist Unit (Ultrasonic) Related Module

B14F4-87: (VCM) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location Communication error with parking assist unit (ultrasonic) related module
Detection condition
  • The vehicle control module (VCM) detects that the parking assist unit (ultrasonic) received a communication error with the following modules.
    • Electronically controlled brake unit/DSC HU/CM
    • Electrical supply unit (ESU)
    • Vehicle control module (VCM)
    • Body control module (BCM)
Fail-safe (See DTC TABLE [VCM] .)
Possible cause
  1. Internal malfunction related DTCs are stored in the following modules.
  2. DTCs are stored in the following modules
  3. Electrical supply unit (ESU) related DTCs are stored in the body control module (BCM). (See DTC TABLE [BCM] .)
  4. Configuration related DTCs are stored in the following modules.
  5. Parking assist unit (ultrasonic) malfunction (Refer to PARKING ASSIST UNIT (ULTRASONIC) REMOVAL/INSTALLATION in service information.)
  6. Vehicle control module (VCM) malfunction (built into body control module (BCM)) (Refer to BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION in service information.)
Repeatability verification procedure
  1. Clear the DTC recorded in the memory. (See CLEARING DTC .)
System wiring diagram
  • Not applicable