Comprehensive Component Monitor (Engine Output)

OBD System Description - Comprehensive Component Monitor (Engine Output)

DTC Description / Detecting Condition / Confirmation Procedure

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

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

P0447
Refer to DTC P0447: Evaporative Emission Control System Vent Control Circuit Open. P0447

P0448
Refer to DTC P0448: Evaporative Emission Control System Vent Control Circuit Shorted. P0448

P0480
Refer to DTC P0480: Cooling Fan 1 (Radiator Cooling Fan) Control Circuit. P0480

P0481
Refer to DTC P0481: Cooling Fan 2 (A/C Condenser Fan) Control Circuit. P0481

P0496
Refer to DTC P0496: Evaporative Emission Control System Flow during Non-Purge. P0496

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

Operation:

Enable Condition:

Typical Malfunction Thresholds:

Canister Purge Valve Circuit Monitor

Operation:

Enable Condition:

Typical Malfunction Thresholds:

Canister Vent Valve Circuit Monitor

Operation:

Enable Condition:

Typical Malfunction Thresholds:

Canister Purge Valve Rationality Monitor

MODE $06 Data:

MODE $06 Data

Operation:

Enable Condition:

Typical Malfunction Thresholds:

Cooling Fan 1 (Radiator Cooling Fan) Control Circuit Monitor

Operation:

Enable Condition:

Typical Malfunction Thresholds:

Cooling Fan 2 (A/C Condenser Fan) 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 Part 1:

Enable Condition Part 2:

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 maintained and the system has a high rpm (+200) or low rpm error ( 100) greater than the malfunction threshold, an IAC malfunction is indicated.