What Can Cause a Purge Pump to Fail?
1 Answers
Here are the reasons that can cause a purge pump to fail: 1. Charcoal canister failure: The technician lifts the vehicle with a hoist, removes the charcoal canister, and uses an air gun to blow through the canister to check for blockages, thus confirming the issue. If the charcoal canister fails, it cannot absorb fuel tank vapors, causing the purge pump to malfunction. 2. Purge pump wiring failure: The technician opens the engine hood and inspects the purge pump wiring for any damage or breaks to confirm the issue. If the purge pump wiring fails, it cannot supply power to the purge pump, leading to its malfunction. 3. Purge pump failure: The technician uses a diagnostic tool to read the purge pump's data stream and analyze its operational status. If abnormal, the technician can measure the purge pump's resistance with a multimeter. If the resistance is outside the normal range, the failure is confirmed.