DTC U0423 [MULTI INFORMATION DISPLAY]SM2445949
DTC U0423 [MULTI INFORMATION DISPLAY]

id0902i4936000

DESCRIPTION

Invalid data received from instrument cluster

DETECTION CONDITION
• Multi information display receives invalid signal of vehicle speed data from the instrument cluster for 5 s or more, while the ignition switch is ON.
POSSIBLE CAUSE
• PCM DTC is stored
• Instrument cluster DTC is stored
• Multi information display malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION

1
VERIFY PCM DTC
• Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L5].) (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].) (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
Go to the next step.
2
VERIFY INSTRUMENT CLUSTER DTC
• Perform the “DTC INSPECTION” to confirm the instrument cluster DTC. (See DTC INSPECTION [INSTRUMENT CLUSTER].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
Go to the next step.
3
VERIFY TROUBLESHOOTING COMPLETED
• Clear the DTC from multi information display using the M-MDS. (See CLEARING DTC [MULTI INFORMATION DISPLAY].)
• Turn the ignition switch to the ON position.
• Perform the “DTC INSPECTION” to confirm the multi information display DTC. (See DTC INSPECTION [MULTI INFORMATION DISPLAY].)
• Is the same DTC present?
Yes
Replace the multi information display, then go to the next step.
No
Go to the next step.
4
VERIFY THAT NO OTHER DTCs ARE PRESENT
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.