DTC U2300:54/U2300:55/U2300:56 [RADAR UNIT]

id1502a6100100

Description	•  U2300:54: Configuration error (data not received) •  U2300:55: Configuration error (no configuration) •  U2300:56: Configuration error (Ineffective/non-interchangeable data read)
Detection condition	•  The radar unit detects configuration setting failure.
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	Note •  If the radar unit is replaced with a new one, the configuration is re-performed within 6 s after the ignition is switched ON (engine off). •  After performing the configuration, DTC U2300:55 will be cleared if the ignition is switched ON (engine off) after the ignition is switched off. •  Module configuration procedure was not completed properly •  Correct data cannot be received from instrument cluster •  Instrument cluster malfunction •  Radar unit malfunction •  The radar unit which had already been installed on another vehicle is installed on a different vehicle.
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	RECORD THE CAR CONFIGURATION DATA •  Switch the ignition ON (engine off) and wait for 6 s or more. •  Switch the ignition off. •  Switch the ignition ON (engine off).		Go to the next step.
2	PERFORM DTC INSPECTION FOR RADAR UNIT •  Clear radar unit DTCs using the M-MDS. (See CLEARING DTC [RADAR UNIT].) •  Switch the ignition ON (engine on). •  Perform the radar unit DTC inspection using the M-MDS. (See DTC INSPECTION [RADAR UNIT].) •  Is the same Pending DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, go to the next step.
		No	Go to Step 5.
3	PERFORM DTC INSPECTION FOR INSTRUMENT CLUSTER •  Perform the instrument cluster DTC inspection using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER].) •  Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [INSTRUMENT CLUSTER].) After repairing the instrument cluster, perform the instrument cluster configuration. (See INSTRUMENT CLUSTER CONFIGURATION (USING AS-BUILT DATA).) Go to the next step.
		No	Go to the next step.
4	VERIFY THAT REPAIRS HAVE BEEN COMPLETED •  Clear radar unit DTCs using the M-MDS. (See CLEARING DTC [RADAR UNIT].) •  Switch the ignition ON (engine on). •  Perform the radar unit DTC inspection using the M-MDS. (See DTC INSPECTION [RADAR UNIT].) •  Is the same Pending DTC present?	Yes	Repeat the inspection from Step 1. •  If the malfunction does not recur, go to the next step. •  If the malfunction recurs, replace the radar unit. (See RADAR UNIT REMOVAL/INSTALLATION.) Go to the next step.
		No	Go to the next step.
5	VERIFY THAT NO OTHER DTCs ARE PRESENT •  Verify other DTCs displayed. •  Are any other DTCs output?	Yes	Perform the corresponding DTC inspection.
		No	DTC troubleshooting completed.