Comprehensive Component Monitor (Engine Output)

OBD System Description - Comprehensive Component Monitor (Engine Output)

DTC Description / Detecting Condition / Confirmation Procedure

P0444
Refer to DTC P0444: Evaporative Emission System Purge Control Valve Circuit Open. P0444

P0445
Refer to DTC P0445: Evaporative Emission Control System Purge Control Valve Circuit Shorted. P0445

P0449
Refer to DTC P0449: Evaporative Emission System Vent Valve / Solenoid Circuit. P0449

P0480
Refer to DTC P0480: Cooling Fan 1 Control Circuit. P0481 Refer to DTC P0481: Cooling Fan 2 Control Circuit. P0480

P0505, P0506, P0507
Refer to DTC P0505 / P0506 / P0507: Idle Air Control System Malfunction / RPM Lower than Expected / RPM Higher than Expected. P0505

P2400
Refer to DTC P2400: Evaporative Emission System Leak Detection Pump Control Circuit / Open. P2400

Operation:

Enable Condition:

Typical Malfunction Thresholds:

Canister Purge Valve Circuit Monitor Operation

Operation:

Enable Condition:

Typical Malfunction Thresholds:

Canister Purge Valve Rationality Monitor

Operation:

Enable Condition:

Typical Malfunction Thresholds:

Cooling Fan 1 Control Circuit Monitor

Operation:

Enable Condition:

Typical Malfunction Thresholds:

Cooling Fan 2 Control Circuit Monitor

IAC System Monitor

Monitoring procedure

Operation:

Enable Condition:

Typical Malfunction Thresholds:

Input signal of Idle Air Control (IAC) is checked for open, short of circuit by monitoring input voltage.

IAC Actuator Circuit Monitor

Monitoring procedure

Operation:

Enable Condition:

Typical Malfunction Thresholds:

The Idle Air Control (IAC) solenoid functionally checked by monitoring the closed loop idle speed correction required to maintain the desired idle rpm. If the proper idle rpm cannot be maintained and the system has a high rpm (+200) or low rpm error (100) greater than the malfunction threshold, an IAC malfunction is indicated.