Code No. P2229: Barometric Pressure Sensor Circuit High Input


FUNCTION



  • The barometric pressure sensor is incorporated in engine-ECU, and converts the barometric pressure into a voltage signal.
  • In response to the signal, the engine-ECU compensates the fuel injection amount, etc.

TROUBLE JUDGMENT


Check Conditions
  • More than 2 seconds have passed since the engine starting sequence was completed.
  • Battery positive voltage is more than 8.3 V.
Judgement Criterion
  • Barometric pressure sensor output voltage is more than 4.5 V (corresponding to a atmosphere pressure of 114 kPa or more) for 12 seconds.
FAIL-SAFE AND BACKUP FUNCTION
  • Control as if the barometric pressure is 101kPa.

PROBABLE CAUSE



  • Failed barometric pressure sensor

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

  • Reconfirmation of diagnosis code.

Q. Is the diagnosis code set?
Replace the engine-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).