SYSTEM SCREEN IS NOT DISPLAYED IN LCD / LCD DISPLAY IS UNMATCHED [RADAR UNIT]

id1503a1010600

Description

• The system screen is displayed in the LCD even if the system is operated.

• The display in the LCD is unmatched with the system operation.

Possible malfunction

Note

• The detection performance of the radar unit has limitations and the mazda radar cruise control (MRCC) system may not operate normally. For the detection performance limitations, refer to the [RADAR UNIT] in the technical guide.

• All or some of the LCD cannot be displayed

― Instrument cluster malfunction (display malfunction)

― Connector connection malfunction

• Radar unit output false signal

― False signal input from steering switch/cruise control switch

― Radar unit malfunction

Diagnostic Procedure

Step

Inspection

Action

1

INSPECT INSTRUMENT CLUSTER

•  Inspect the LCD using the M-MDS instrument cluster active command modes LCD_SEG.
(See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].)

•  Is the LCD displayed normally?

Yes

Go to the next step.

No

Replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

2

VERIFY INSTRUMENT CLUSTER CONNECTOR CONDITION

•  Disconnect the negative battery cable.
(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

•  Disconnect the instrument cluster connector.

•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.

•  Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector.

3

INSPECT STEERING SWITCH/CRUISE CONTROL SWITCH

•  Inspect the steering switch/cruise control switch.

•  Is the steering switch/cruise control switch normal?

Yes

Go to the next step.

No

Replace the steering switch/cruise control switch.

(See CRUISE CONTROL SWITCH REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)].)

4

INSPECT RADAR UNIT

•  Inspect the radar unit.
(See RADAR UNIT INSPECTION.)

•  Is the radar unit normal?

Yes

Symptom troubleshooting is completed.

No

Replace the radar unit.

(See RADAR UNIT REMOVAL/INSTALLATION.)

Step	Inspection		Action
1	INSPECT INSTRUMENT CLUSTER • Inspect the LCD using the M-MDS instrument cluster active command modes LCD_SEG. (See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].) • Is the LCD displayed normally?	Yes	Go to the next step.
1		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
2	VERIFY INSTRUMENT CLUSTER CONNECTOR CONDITION • Disconnect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Disconnect the instrument cluster connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
2		No	Repair or replace the connector.
3	INSPECT STEERING SWITCH/CRUISE CONTROL SWITCH • Inspect the steering switch/cruise control switch. • Is the steering switch/cruise control switch normal?	Yes	Go to the next step.
3		No	Replace the steering switch/cruise control switch. (See CRUISE CONTROL SWITCH REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)].)
4	INSPECT RADAR UNIT • Inspect the radar unit. (See RADAR UNIT INSPECTION.) • Is the radar unit normal?	Yes	Symptom troubleshooting is completed.
4		No	Replace the radar unit. (See RADAR UNIT REMOVAL/INSTALLATION.)