2006 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

DTC P0511: Notes

DTC P0511 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0511 IAC system malfunction
DETECTION CONDITION 
  • If the PCM detects that the IAC signal voltage is above 4.7 V  or below 1.0 V  when the IAC control duty target is within 20-100%  , the PCM determines there is an IAC circuit problem.

Diagnostic support note 

  • This is a continuous monitor (CCM).
  • The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycles.
  • PENDING CODE is available if the PCM detects the above malfunction condition.
  • FREEZE FRAME DATA is available.
  • DTC is stored in PCM memory.
POSSIBLE CAUSE 
  • IAC valve circuit malfunction
  • Short to ground in wiring harness between IAC valve terminal A and main relay terminal 87
  • Short to ground in wiring harness between IAC valve terminal B and PCM terminal 88
  • Open circuit in wiring harness between IAC valve terminal A and main relay terminal 87
  • Open circuit in wiring harness between IAC valve terminal B and PCM terminal 88
  • Short to power supply in wiring harness between IAC valve terminal A and main relay terminal 87
  • Short to power supply in wiring harness between IAC valve terminal B and PCM terminal 88
  • Poor connection of IAC valve connector or PCM connector
  • PCM malfunction
G04327941Courtesy of MAZDA MOTORS CORP.
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