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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (On-Board Diagnostics - A/T) >> DTC U0073-00: U0100-00: U0121-00: U0131-00: U0155-00: U0214-00: Can System Communication Error (HS Can) >> Notes

DTC U0073-00: U0100-00: U0121-00: U0131-00: U0155-00: U0214-00: Can System Communication Error (HS Can): Notes

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
DTC U0073:00 CAN system communication error (HS CAN)
DETECTION CONDITION 
  • Under the following condition, a communication error (HS CAN) occurs:
    • Battery voltage is 10 V or more  .
FAIL-SAFE FUNCTION 
  • Inhibits learning control.
  • Inhibits neutral idle control.
  • Inhibits AAS.
POSSIBLE CAUSE 
  • CAN bus communication line malfunction (HS CAN)
  • TCM malfunction
SYSTEM WIRING DIAGRAM  Not applicable
DTC U0100:00 Communication error to PCM (HS CAN)
DETECTION CONDITION 
  • Under the following condition, the TCM cannot receive the signal from PCM (HS CAN):
    • Battery voltage is 10 V or more  .
FAIL-SAFE FUNCTION 
  • Inhibits learning control.
  • Inhibits neutral idle control.
  • Inhibits AAS.
POSSIBLE CAUSE 
  • CAN communication line malfunction between PCM and TCM (HS CAN)
  • TCM malfunction
SYSTEM WIRING DIAGRAM  Not applicable
DTC U0121:00 Communication error to DSC HU/CM
DETECTION CONDITION 
  • Under the following condition, the TCM cannot receive the signal from DSC HU/CM:
    • Battery voltage is 10 V or more  .
FAIL-SAFE FUNCTION 
  • Inhibits learning control.
  • Inhibits neutral idle control.
  • Inhibits AAS.
POSSIBLE CAUSE 
  • CAN communication line malfunction between TCM and DSC HU/CM
  • TCM malfunction
SYSTEM WIRING DIAGRAM  Not applicable
DTC U0131:00 Communication error to EPS control module
DETECTION CONDITION 
  • Under the following condition, the TCM cannot receive the signal from EPS control module:
    • Battery voltage is 10 V or more  .
FAIL-SAFE FUNCTION 
  • Inhibits learning control.
  • Inhibits neutral idle control.
POSSIBLE CAUSE 
  • CAN communication line malfunction between TCM and EPS control module
  • TCM malfunction
SYSTEM WIRING DIAGRAM  Not applicable
DTC U0155:00 Communication error to instrument cluster
DETECTION CONDITION 
  • Under the following condition, the TCM cannot receive the signal from instrument cluster:
    • Battery voltage is 10 V or more  .
FAIL-SAFE FUNCTION 
  • Inhibits learning control.
  • Inhibits manual mode.
  • Inhibits neutral idle control.
POSSIBLE CAUSE 
  • CAN communication line malfunction between TCM and instrument cluster
  • TCM malfunction
SYSTEM WIRING DIAGRAM  Not applicable
DTC U0214:00 Communication error to start stop unit
DETECTION CONDITION 
  • Under the following condition, the TCM cannot receive the signal from start stop unit:
    • Battery voltage is 10 V or more  .
FAIL-SAFE FUNCTION 
  • Inhibits direct mode.
POSSIBLE CAUSE 
  • CAN communication line malfunction between TCM and start stop unit
  • TCM malfunction
SYSTEM WIRING DIAGRAM  Not applicable
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