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2. RESTRICTED AIR INLET SYSTEM Turn the ignition off. Remove the Air Cleaner Assembly. Remove the Air Filter. Inspect the Throttle Body opening for signs of any foreign materials. Check the intake tube/ air cleaner for obstructions - include snow packing questions to customer. Were any restrictions found? Yes >> Repair the restriction as necessary. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 3 3. MAP SENSOR OPERATION Start the engine. With a scan tool, monitor the MAP Sensor voltage. Snap the Accelerator pedal. Does the MAP Sensor voltage vary from below 2.0 volts at idle to above 3.5 volts at Wide Open Throt- Yes >> Go To 4 No >> Go To 11 4. TP SENSOR OPERATION Ignition on, engine not running. With a scan tool, perform the Throttle Follower Test. TP Sensor No.1 should start at approximately 0.8 of a volt and increase to 4.2 volts. TP Sensor No.2 should start at approximately 4.2 volts and decrease to 0.8 of a volt. Is the voltage transition smooth between the appropriate values? Yes >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 5 9 - 852 ENGINE ELECTRICAL DIAGNOSTICS LX |