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P2101-ELECTRONIC THROTTLE CONTROL MOTOR PERFORMANCE (CONTINUED) 3. THROTTLE POSITION WITHIN 2° DEGREES OF DESIRED THROTTLE POSITION Start the engine. Allow the engine to reach normal operating temperature. With a scan tool, monitor the Actual Throttle Position and Desired Throttle Position. Compare the Actual Throttle Position and the Set Point Throttle Position. Is the Actual Throttle Position within 2° degrees of the Desired Throttle Position? Yes >> Go To 4 No >> Replace the Throttle Body Assembly. Disconnect the Battery when replacing the Throttle Body Assem- bly. After installation is complete, use a scan tool and select the ETC RELEARN function. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 4. ETC OPERATION Ignition on, engine not running. With a scan tool, actuate the Electronic Throttle Control Motor. NOTE: It may be necessary to use a mirror to see the throttle blade. NOTE: Make sure the motion of the throttle blade is smooth and that it opens and closes. Did the ETC motor operate properly? Yes >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Replace the Throttle Body Assembly. Disconnect the Battery when replacing the Throttle Body Assem- bly. After installation is complete, use a scan tool and select the ETC RELEARN function. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) HB ENGINE ELECTRICAL DIAGNOSTICS 9 - 847 |