DTC U2300:54, U2300:55, U2300:56, U2300:64 [RADAR UNIT]

System malfunction location	• U2300:54: Configuration error (data not received) • U2300:55: Configuration error (no configuration) • U2300:56: Configuration error (Ineffective/non-interchangeable data read) • U2300:64: Configuration error (error value 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 • Radar unit malfunction
System wiring diagram	• Not applicable

System malfunction location

• U2300:54: Configuration error (data not received)

• U2300:55: Configuration error (no configuration)

• U2300:56: Configuration error (Ineffective/non-interchangeable data read)

• U2300:64: Configuration error (error value 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

• Radar unit malfunction

System wiring diagram

• Not applicable

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 (LOCK). • 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 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).) Then 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 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.

Step

Inspection

Action

RECORD THE CAR CONFIGURATION DATA

• Switch the ignition ON (engine off) and wait for 6 s or more.

• Switch the ignition off (LOCK).

• Switch the ignition ON (engine off).

Go to the next step.

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 DTC present?

Yes

Repeat the inspection from Step 1.

If the malfunction recurs, go to the next step.

Go to Step 5.

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).)

Then go to the next step.

Go to the next step.

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 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.

VERIFY THAT NO OTHER DTCs ARE PRESENT

• Verify other DTCs displayed.

• Are any other DTCs output?

Yes

Perform the corresponding DTC inspection.

DTC troubleshooting completed.