Intake Air System Monitor

OBD System Description - Intake Air System Monitor

Intake Air System Leak

DTC Description / Detecting Condition / Confirmation Procedure
P2282 refer to DTC P2282: Intake Manifold Air Leak. P2282

Monitor Strategy Description
Determines if an engine vacuum leak exists.
Under idle conditions, the MAP estimate correction is a weighted difference between the predicted MAP and the actual MAP reading.

Malfunction Criteria
Current IC value > 12

Enable Conditions
Normal Idle conditions = TRUE boolean
AND Canister Purge Fuel Flow = 100 g/sec.
AND Barometric Pressure > 72 kPa
AND Engine Run Time = 2 s
AND Air Intake Temperature = -20 degrees C
AND Coolant Temperature = -10 degrees C
AND Ignition Voltage = 11 V
AND Ignition Voltage = 16 V
AND Enable Conditions Timer > 3 s
AND Instrumentation slew commanded = FALSE boolean
AND OFVC Device Control = FALSE boolean

Time required
Time Length and Frequency:
10 seconds of fail conditions out of 20 seconds