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Home >> Mazda >> 2022 >> CX-5 Turbo Signature >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 19 (On-Board Diagnostic - Engine Control System (VIN M) (6 Of 7)) >> DTC P26FE-00: Exhaust Shutter Valve Range/Performance Problem >> Details On DTCs

Details On DTCs

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DTC P26FE-00: (PCM, VIN M) DETECTION CONDITION AND POSSIBLE CAUSE

Description Exhaust shutter valve range/performance problem
Detection condition Determination conditions
  • If any of the following conditions is met under condition A or condition B:
Condition A:
  • The feedback correction value of the exhaust shutter valve opening angle controlled by the PCM continues at the duty value of 100%.
Condition B:
  • Exhaust shutter valve has a drive circuit malfunction.
Preconditions Condition A:
  • Battery voltage: above 8 V*1

Condition B:
  • Battery voltage: above 8 V*1
  • The input value from the exhaust shutter valve position sensor is in the closed valve side even though the PCM requests to operate the exhaust shutter valve to the open valve side.
  • The following DTCs are not detected:
    • Exhaust shutter valve: P2BF6-00: and P2BF7-00:

*1 : Standard can be verified by displaying PIDs using M-MDS
Malfunction determination period
  • 5 s period
Drive cycle
Self test type
  • CMDTC self test, KOEO self test, KOER self test
Sensor used
  • Exhaust shutter valve position sensor
Fail-safe function
  • PCM restricts engine torque.
Vehicle status when DTCs are output
  • Abnormal acceleration is occurring
  • Booming noise from vehicle is occurring during cylinder deactivation control
  • Illuminates master warning light, (without multi-information display)
  • The master warning indication is displayed on the multi-information display, (with multi-information display)
Possible cause
  • Exhaust shutter valve connector or terminals malfunction
  • PCM connector or terminals malfunction
  • Short to ground in wiring harness between the following terminals:
    • Exhaust shutter valve terminal A-PCM terminal 1CS
      • Exhaust shutter valve terminal B-PCM terminal 1CT
  • Exhaust shutter valve circuits are shorted to each other
  • Short to power supply in wiring harness between the following terminals:
    • Exhaust shutter valve terminal A-PCM terminal 1CS
      • Exhaust shutter valve terminal B-PCM terminal 1CT
  • Open circuit in wiring harness between the following terminals:
    • Exhaust shutter valve terminal A-PCM terminal 1CS
      • Exhaust shutter valve terminal B-PCM terminal 1CT
  • Exhaust shutter valve malfunction (valve stuck closed)
  • PCM malfunction
G14464134Courtesy of MAZDA MOTORS CORP.
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