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Home >> Mazda >> 2020 >> CX-9 Signature >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine >> Engine Control System Operation Inspection >> Brake Override System Operation Inspection
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Brake Override System Operation Inspection

NOTE:
  • If the brake override system operates normally after performing the following inspection, the PCM detects DTC P2299:00.
  1. Start the engine and let it idle.
  2. Verify that the engine speed becomes less than 1, 200 rpm under the following conditions.
    • N position
    • Engine speed of 3, 000 rpm or more with accelerator pedal depressed
    • Brake pedal depressed
      • If the engine speed becomes approx. 1, 200 rpm, clear the PCM DTC using the M-MDS. (Brake override system operation is normal.)
      • If the engine speed does not become approx. 1, 200 rpm, inspect for the following parts, then repair or replace the malfunctioning part:
    • APP sensor (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION .)
    • Brake switch No. 1 (See BRAKE SWITCH INSPECTION .)
    • Brake switch No. 2 (See BRAKE SWITCH INSPECTION .)
    • Communication between PCM and TCM (See FOREWORD .)