DTC P2229: Barometric Pressure Circuit High Input

CIRCUIT OPERATION
• A 5-volt voltage is supplied to the barometric pressure sensor power terminal (terminal No. 1) from the ECM (terminal No. 81) <M/T> or PCM (terminal No. 46) <A/T>. The ground terminal (terminal No. 5) is grounded with ECM (terminal No. 40) <M/T> or PCM (terminal No. 16) <A/T>.
• A voltage that is proportional to the atmospheric pressure is sent to the ECM (terminal No. 85) <M/T> or PCM (terminal No. 55) <A/T> from the barometric pressure sensor output terminal (terminal No. 2).
TECHNICAL DESCRIPTION
• The barometric pressure sensor outputs a voltage which corresponds to the barometric pressure.
• The ECM <M/T> or PCM <A/T> checks whether this voltage is within a specified range.
DESCRIPTIONS OF MONITOR METHODS
• If the barometric pressure sensor output is out of the actual predictable atmospheric pressure range [higher than 113 kPa (33 in.Hg)], a malfunction is determined to have occurred.
MONITOR EXECUTION
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
• Not applicable

Sensor (The sensor below is determined to be normal)
• Not applicable
DTC SET CONDITIONS Logic Flow Chart


Check Conditions
2 seconds or more have passed since the starting sequence was completed.
Battery positive voltage is higher than 8 volts.

Judgement Criterion
• Barometric pressure sensor output signal has continued to be approximately 113 kPa (33 in.Hg) or higher (approximately 4,000 ft below sea level) for 10 seconds.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 19 .
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:
• Barometric pressure sensor failed.
• Open or shorted barometric pressure sensor circuit, or connector damage.
• ECM failed. <M/T>
• PCM failed. <A/T>