
Pressure control solenoid , Mechanically inop
Tearing my hair out here. First off though , let me stress ;
THE PCM IS TRYING TO OPERATE THE PRESSURE CONTROL SOLENOID;
12volts at terminal G and there is a toggling ground via pcm
at terminal F ( ie the 12v is being modulated by pcm ) so
broken wires , terminals and PCM are not at fault here. Also
the PC sol would not "Buzz " even when modulated Directly at
the solenoid terminals in or out the car. ( although after
an hour on the bench and the solenoid started to work again)
Now , this car has been losing all gears ; po731 , p0732,
po733 , and po734 have been setting after as little as 10
minutes or as many as 3 days of driving. When the DTCS set
and car loses gears main line pressure falls to 60psi and
reverse is effected also. While this happening the P/C
solenoid is inop MECHANICALLY and "stuck " closed cutting
off most line pressure through the Valve body. The PCM is
still supplying a PWM toggle signal thru ct 1530 and power
is verified through ct 1525. In Fact , applying power and
ground to terminals F&G at the valve body connector and then
even DIRECTLY TO the solenoid itself will not operate the
solenoid when this happens . Ray from California ![]()
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Engine | 1.9 L |
Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1998 Saturn SC2 1.9L
Engine | 1.9 L |
Trans | 4-speed Automatic (Electronic) |