DTC: 16-Er12; 26-Er81; CAN SYSTEM COMMUNICATION ERRORS: Notes

DETECTION CONDITION AND POSSIBLE CAUSES

Description	CAN system communication error
Detection condition	16:Er12 The audio unit cannot receive CAN signal. 26:Er81 The audio unit cannot receive CAN signal from the Bluetooth ® unit.
Fail-safe	16:Er12 Not applicable 26:Er81 Not applicable
Possible cause	Audio unit connector or terminal malfunction Bluetooth ® unit connector or terminal malfunction Connector C-58 connector or terminal malfunction Short to power supply in wiring harness between the following terminals: Audio unit terminal 1O-Bluetooth ® unit terminal Y Short to ground in wiring harness between the following terminals: Audio unit terminal 1Q-Bluetooth ® unit terminal Z Short circuit in the following wiring harnesses: Audio unit terminal 1O-Bluetooth ® unit terminal Y Audio unit terminal 1Q-Bluetooth ® unit terminal Z Open circuit in wiring harness between the following terminals: Bluetooth ® unit terminal Y-Connector C-58 Bluetooth ® unit terminal Z-Connector C-58 Audio unit terminal 1O-Connector C-58 Audio unit terminal 1Q-Connector C-58 Bluetooth ® unit malfunction Audio unit malfunction

Fig 1: Audio And Bluetooth Unit Communication Diagram

Courtesy of MAZDA MOTORS CORP.

CAUTION:

• When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals.