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6E2–246 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS intake manifold, leaks at the throttle body, faulty or D Throttle body – Check for sticking throttle plate. Also Reviewing the Failure Records vehicle mileage since the DTC P1509 –IAC System High RPM
Step Action Value(s) Yes No 1 Was the “On-Board Diagnostic (OBD) System Check” — Go to Step 2 Go to OBD System Check 2 1. Start the engine. etc.). 3. Using a Tech 2, command RPM up to 1500, down to 500, and then up to 1500 while monitoring “Engine NOTE: This Tech 2 command may cause the engine to Does the “Engine Speed” remain within the specified ± 50 RPM No trouble found. Go to Diagnostic Aids Go to Step 3 3 1. Disconnect the IAC. equivalent. 3. With the engine running, command RPM up to 1500, down to 500, and then up to 1500 while NOTE: This Tech 2 command may cause the engine to Does each noid light cycle red and green (never — Go to Step 5 Go to Step 4 4 1. Check the following circuits for an open, short to voltage, short ground, or poor connections at the D IAC “A” Low. D IAC “A” High. D IAC “B” Low. D IAC “B” High. 2. If a problem its found, repair as necessary. Was a problem found? — Verify repair Go to Step 8 |