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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (On-Board Diagnostics [Electric Parking Brake]) >> DTC U0423-82: Error Signal Received From Instrument Cluster >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
Step Inspection Action
1 VERIFY INSTRUMENT CLUSTER DTCs 
Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [INSTRUMENT CLUSTER] .)
No Go to the next step.
2 VERIFY IF MALFUNCTIONING LOCATION IS INSTRUMENT CLUSTER DEPENDING ON REPEATABILITY 
  • Clear the DTC for the electric parking brake control module using the M-MDS.

    (See CLEARING DTC [ELECTRIC PARKING BRAKE] .)

  • Perform the following procedure 3 times or more. 
    • Pull up the electric parking brake switch to operate the electric parking brake.
    • Press down the electric parking brake switch to release the electric parking brake.
  • Retrieve the electric parking brake control module DTCs using the M-MDS.

    (See DTC INSPECTION [ELECTRIC PARKING BRAKE] .)

  • Is the same DTC displayed?
Yes Replace the instrument cluster, then go to the next step.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
No Go to Step 4.
3 VERIFY THAT REPAIRS HAVE BEEN COMPLETED 
  • Clear the DTC for the electric parking brake control module using the M-MDS.

    (See CLEARING DTC [ELECTRIC PARKING BRAKE] .)

  • Perform the following procedure 3 times or more. 
    • Pull up the electric parking brake switch to operate the electric parking brake.
    • Press down the electric parking brake switch to release the electric parking brake.
  • Retrieve the electric parking brake control module DTCs using the M-MDS.

    (See DTC INSPECTION [ELECTRIC PARKING BRAKE] .)

  • Is the same DTC displayed?
Yes Replace the electric parking brake control module, then go to the next step.
(See ELECTRIC PARKING BRAKE CONTROL MODULE REMOVAL/INSTALLATION .)
No Go to the next step.
4 VERIFY IF OTHER DTCs DISPLAYED 
  • Are any other DTCs displayed?
Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [ELECTRIC PARKING BRAKE] .)
No DTC troubleshooting completed.