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P0581-SPEED CONTROL SWITCH 1 CIRCUIT HIGH (5.7L) (CONTINUED) For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS). For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes (V37) S/C SWITCH NO.1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE (V37) S/C SWITCH NO.1 SIGNAL CIRCUIT OPEN (V937) SWITCH RETURN CIRCUIT OPEN CLOCKSPRING SPEED CONTROL SWITCH PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. SPEED CONTROL SWITCH VOLTAGE HIGH NOTE: Do not press any of the Speed Control Switch buttons. With a scan tool, read the Speed Control voltage. Is the Speed Control voltage above 4.8 volts? Yes >> Go To 2 No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 630 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |