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Home >> Suzuki >> 2003 >> Aerio SX, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0445: Evaporative Emissions System - Purge Control Short Circuit >> Circuit Description
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Circuit Description

WARNING: This page is about a different car, the 2002 Isuzu Trooper. However, it is still accessible from the selected car via links, so may be relevant.

EVAP canister purge valve is controlled by PCM. PCM monitors vacuum level via Fuel Vapor Pressure (FVP) sensor input. At an appropriate time, Evaporative (EVAP) canister purge valve is ON, allowing engine vacuum to draw a small vacuum on entire EVAP emission system.

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 after DTC diagnostic runs and fault is no longer recognized. A history DTC P0445 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.

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