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The shift solenoid valves are two identical, electronic exhaust valves that control upshifts and downshifts in all forward gear ranges. These valves are normally open. These shift solenoid valves work together in a combination of ON and OFF sequences in order to control the positions of the 1-2, 2-3, and 3-4 shift valve trains. The TCM monitors numerous inputs to determine the appropriate solenoid state combination and transmission gear for the vehicle operating conditions.
Remove the transmission side cover. Refer to Control Valve Body Cover Replacement . Remove the 1-2 shift solenoid retainer clip (304), the 1-2 shift solenoid (305) with O-ring (303), the 1-2 shift valve (302), and the 1-2 shift valve spring (301).
Remove the PNP switch. Refer to Park/Neutral Position Switch Replacement . Remove the transmission upper side cover bolts. Install the engine support fixture. Refer to Engine Support Fixture in Engine Mechanical. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. Remove the left front tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels. Remove the left inner fender liner. Refer to Front Fender Liner Replacement in Body Front End. Remove the wheel drive shaft from the transmission. Refer to Wheel Drive Shaft Replacement in Wheel Drive Shafts. Remove the power steering gear mounting bolts. Refer to Steering Gear Replacement in Power Steering. Remove the frame. Refer to Frame Replacement in Frame and Underbody.
This is a tough repair an needs special tools to do it . your best bet is take it to AAMCO
you did not ask a question, why is that? just a code.
which trans, regular or CVT? there are 3 transmissions. and m/t
the Trans chapter shows 7 trans. and 4wd options.???
VIN code A,C or G? (tranny code is in VIN)????
p2 is a factory only code.
Downshift Switch Circuit Low
are asking how to do all the FSM steps. to diagnose this.?
you reset it and it came back
are there driving symptoms??????????
the set is. P2779 Downshift Switch Circuit Range/Performance
P2780 Downshift Switch Circuit Low
P2781 Downshift Switch Circuit High
P2782 Downshift Switch Circuit Intermittent/Erratic
the key to understanding the cause is to understand the test.
how is the test done, (monitors) and what does it actually measure.
a real fsm will tell you if the LOW means, voltage at solenoid is low.
or RPM was too low.
and is key to the cause.
i dont have the real FSM, and online shows nothing.
Do you mean upshifting starts way early? Going from 2nd to 3rd in other words?
Ireally don't know your transmission,but the alternator problem might've possibly spiked and hurt your shifting solenoids in the ******. don-ohio (:^)
There is a Manual Lever Position Switch on the side of your trans that, as it ages, can begin to cause erratic or incorrect gear selection. The MLPS is held onto the driver side of the trans with 2 bolts and is attached to a harness. It is less than $40 and is pretty easy to change out, and requires it be set up in neutral to be properly adjusted (switch and gearshift lever).
Its possible that your transmissions Shift Solonoids could be acting erratically, either because they themselves are faulty, or the transmission's ECU is faulty, or maybe even the wiring between the two is somewhat faulty.
However it is also possible that your transmission's Speed Governor is holding too much pressure and doesn't realize it needs to downshift when you start slowing down.
Thirdly it is also possible that your Torque-Converter lockup may be siezed, or the wiring feeding it may be faulty.
Transmission repairs are usually somewhat pricey, and difficult to pinpoint, and fix, and I'm sorry to say that most of these causes to your problem really can't be checked without pulling the transmission out of the car, and disassembling it to see what the problem is.