Part 1 OBD System Description

OBD System Description

Canister Purge Valve Circuit Monitor

















Canister Vent Valve Circuit Monitor
















IAC System Monitor

Monitoring procedure
The Idle Air Control (IAC) is functionally checked throttle valve opening by monitoring the closed loop idle speed comparing with the desired idle rpm. If the idle rpm is higher than the desired idle rpm by 200 rpm or lower than the desired idle rpm by 100 rpm, an IAC malfunction is detected. (P0507, P0506)
















Throttle Actuator Motor Circuit Monitor
















Throttle Actuator Relay Circuit Monitor
















MAF Sensor Rationality Monitor
















IAT Sensor Rationality Monitor
















ECT Sensor Rationality Monitor
















TP Sensor Rationality Monitor
















Fuel Level Sensor Rationality Monitor
















VSS Rationality Monitor
















Barometric Pressure Sensor Rationality Monitor
















CKP Sensor Rationality Monitor
















CMP Sensor Rationality Monitor
















Starter Signal Circuit Monitor
















ECM Internal Circuit / Memory Monitor
















Throttle Actuator Rational Monitor
















APP Sensor Rationality Monitor
















CAN Communication Signal Circuit Rationality Monitor