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Home >> Suzuki >> 2002 >> XL-7 Plus >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0445: Evaporative Emissions System - Purge Control Short Circuit >> Diagnostic Procedure
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Diagnostic Procedure

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.
  1. Perform ON-BOARD DIAGNOSTIC II SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD-II system check, go to next step.
  2. Turn ignition on. Using scan tool, observe EVAP canister purge valve parameter. If parameter is about zero percent, problem is intermittent. See DIAGNOSTIC AIDS . If parameter is not as specified, go to next step.
  3. Turn ignition off. Disconnect EVAP canister purge valve 2-pin harness connector. EVAP valve is located on intake manifold below throttle body. Disconnect PCM Red 80-pin harness connector E-22. PCM is located at right rear of engine compartment. Check for open or short circuit in Red/Blue wire between EVAP canister purge valve and PCM. See WIRING DIAGRAMS article. If problem is found, go to next step. If no problem is found, go to step  5.
  4. Repair open or short circuit in Red/Blue wire between EVAP canister purge valve and PCM. After repair is complete, see VERIFYING VEHICLE REPAIR  under SELF-DIAGNOSTIC SYSTEM.
  5. Using DVOM, measure resistance between EVAP canister purge valve pins. At 68°F (20°C) resistance should be 25-30 ohms. If resistance is as specified, go to step  7. If resistance is not as specified, go to next step.
  6. Replace EVAP canister purge valve. After repair is complete, see VERIFYING VEHICLE REPAIR  under SELF-DIAGNOSTIC SYSTEM.
  7. Replace and reprogram PCM. See POWERTRAIN CONTROL MODULE REPLACEMENT  under POWERTRAIN CONTROL MODULE. Use scan tool to clear DTC and verify repair.
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