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P0506-IDLE SPEED PERFORMANCE LOWER THAN EXCEPTED For a complete wiring diagram Refer to Section 8W. Theory of Operation • When Monitored: • Set Condition: Possible Causes AIR INDUCTION SYSTEM THROTTLE BODY PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. ACTIVE DTC NOTE: If any other DTCs are present, they must be diagnosed and repaired before continuing this test. With a scan tool, read DTCs. Is the DTC active at this time? Yes >> Go To 2 No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 2. AIR INDUCTION SYSTEM Inspect the Air Induction System for the following problems. Restrictions: Dirty Air Cleaner, Foreign material trap in the air intake tube, etc. Leaks: Air Intake tube connection, Air Cleaner housing, etc. Were any problems found? Yes >> Repair or replace as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 3 9 - 406 ENGINE ELECTRICAL DIAGNOSTICS KJ |