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Home >> Mazda >> 2017 >> CX-9 Touring, AWD >> Repair and Diagnosis (Single Page) >> Brakes >> Parking Brake System >> On-Board Diagnostic - Electric Parking Brake >> DTC U300A-62; Ignition Switch Status Mismatch >> Notes

DTC U300A-62; Ignition Switch Status Mismatch: Notes

DETECTION CONDITION AND POSSIBLE CAUSE

Description Ignition switch status mismatch
Detection condition
  • Electric parking brake control module detects the following mismatches.
    • Condition of IG1 power supply supplied to instrument cluster
      • Condition of IG1 power supply supplied to electric parking brake control module
Fail-safe Not applicable
Possible cause
  • DTCs are stored in the instrument cluster.
    • Instrument cluster power supply circuit malfunction
      • Instrument cluster malfunction
  • Electric parking brake control module connector or terminal malfunction
  • Electric parking brake control module power supply circuit (IG1) malfunction
    • Short to ground in wiring harness between IG1 relay terminal C and electric parking brake control module terminal 1AB
      • C/U IG1 15 A fuse malfunction
        • Open circuit in wiring harness between IG1 relay terminal C and electric parking brake control module terminal 1AB
  • Electric parking brake control module malfunction
G11433169