DTC C1A67-4B; Radar Unit Is Outside Of Operation Range (Ignition Power Supply, Internal Temperature): Notes

DETECTION CONDITION & POSSIBLE CAUSE

Description	Radar unit is outside of operation range (ignition power supply, internal temperature)
Detection condition	Radar unit power supply voltage is other than 9.5 or more or less than 15.5 V. Temperature in radar unit exceeds specification.
Fail-safe	Inhibits the mazda radar cruise control (MRCC) system control Inhibits the smart brake support (SBS) system control Inhibits the distance recognition support system (DRSS) control
Possible cause	DTCs are stored in the PCM. Battery malfunction Generator malfunction IG1 relay malfunction Radar unit power supply circuit malfunction Short to ground in wiring harness between MAIN 200 A fuse and IG1 relay terminal D Open circuit in wiring harness between battery positive terminal and IG1 relay terminal D Radar unit connector or terminal malfunction Short to ground in wiring harness between IG1 relay terminal C and radar unit terminal E C/U IG1 15 A fuse malfunction Open circuit in wiring harness between IG1 relay terminal C and radar unit terminal E Radar unit malfunction
Courtesy of MAZDA MOTORS CORP.