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P1596 Diagnostic Trouble Code Discussion for February 2009

Speed Control Switch Continuous High Voltage

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Trouble Ticket Help Requests for DTC P1596
Help Request Posted
2000 Jeep Grand Cherokee Laredo 4.0L Poor Idle Quality VIN: 1J4GW48S6Y
P1596: Speed Control Switch Continuous High Input. It's a Jeep thing I just don't understand. This jeep has tps voltage over 4 volts as processed info but approx 1 volt @ pcm pin. I did unplug the clockspring but did not help. With clock spring plugged in and push on/off tps drop to 1 volt.
February 09, 2009