Circuit Description

WARNING: This page is about a different car, the 2002 Isuzu Rodeo Sport, 2002 Isuzu Rodeo, 2002 Isuzu Axiom, and 2002 Honda Passport. However, it is still accessible from the selected car via links, so may be relevant.

Powertrain Control Module (PCM) controls engine speed by adjusting position of throttle control valve. Throttle control valve is a DC motor driven by one coil. PCM applies current to DC motor coil position changing idle speed. If PCM detects an idle speed above specification, and PCM is unable to adjust idle speed by increasing the throttle position, DTC P0507 will set, indicating a idle control system concern.

When DTC sets, PCM illuminates MIL on second trip after fault was detected. PCM will store conditions present when DTC was set as freeze frame data in the FAILURE RECORDS data.

PCM will turn MIL off on third consecutive trip cycle during which diagnostic runs and fault is no longer recognized. A history DTC P0453 will clear after 40 consecutive trip cycles during which diagnostic runs and fault is no longer recognized. DTC can be cleared with scan tool, or by disconnecting battery voltage feed to PCM.