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P0580-SPEED CONTROL SWITCH 1 CIRCUIT LOW (3.7L,4.7L) (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 SIGNAL NO.1 CIRCUIT SHORTED TO GROUND (V37) S/C SIGNAL NO.1 CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT CLOCKSPRING SPEED CONTROL ON/OFF SWITCH SPEED CONTROL RESUME/ACCEL SWITCH PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. SPEED CONTROL SWITCH VOLTAGE LOW 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 below 1.0 volt? Yes >> Go To 2 No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 2. SPEED CONTROL ON/OFF SWITCH Ignition on, engine not running. With the scan tool, monitor the Speed Control Switch voltage. Disconnect the Speed Control On/Off Switch harness connector per Service Information. Did the voltage change to above 4.7 volts? Yes >> Replace the Speed Control On/Off Switch. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Go To 3 9 - 614 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |