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Symptom: P1596-SPEED CONTROL SWITCH ALWAYS HIGH When Monitored and Set Condition: P1596-SPEED CONTROL SWITCH ALWAYS HIGH When Monitored: With the ignition key on. Set Condition: An open circuit is detected in the speed control on/off switch circuit. The circuit must be above 4.8 volts for more than 2 minutes to set the DTC. POSSIBLE CAUSES SPEED CONTROL SWITCH GROUND CIRCUIT OPEN CLOCKSPRING TO S/C SWITCH SPEED CONTROL SWITCH GROUND CIRCUIT OPEN PCM TO CLOCKSPRING CLOCKSPRING SIGNAL/GROUND CIRCUIT OPEN S/C WIRING HARNESS OBSERVABLE PROBLEM SPEED CONTROL ON/OFF SWITCH SPEED CONTROL SW SIG CKT OPEN PCM TO CLOCK SPRING SPEED CONTROL SW SIG CKT OPEN CLOCKSPRING TO S/C SWITCH SPEED CONTROL SWITCH SIGNAL CKT SHORTED TO VOLTAGE POWERTRAIN CONTROL MODULE TEST ACTION APPLICABILITY 1 Turn the ignition on. t in Inputs/Outputs, read the Speed Control inputs state. While monitoring the DRBIII t, push the Speed Control On/Off Switch several times, then leave it on. t show Speed Control Switch off and on? All Yes → No → 2 Turn the ignition off. All Yes → Repair as necessary. No → Test Complete. 224 SPEED CONTROL |