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Where exactly is the switch for the air suspension compressor on a 2006 Buick Lucerne CXL?


The automatic level control (ALC) system maintains a desired rear suspension position under all types of towing, hauling, and loading conditions.
The system uses the electronic suspension control module (ESCM), ALC relay, ALC compressor assembly, air dryer, air lines, LR and RR shock absorbers with integral air chambers, LR and RR suspension position sensors, exhaust valve, driver information center (DIC), and the serial data circuit to perform the system functions.
What switch ? there are sensors at the wheels that control the system .
The system uses the automatic level control module (ALCM) with integral suspension position sensor, ALC relay, ALC compressor assembly, air dryer, air lines, LR and RR shock absorbers with integral air chambers, exhaust valve, driver information center (DIC), and the serial data circuit to perform the system functions.

The

Jul 10, 2016 | Buick Cars & Trucks

1 Answer

P1775 code in showing up on my 2008 jeep wrangler x. How do you fix that?


we can not answer what you can do or fix.
only how to diagnose, or is this just a please guess for me post?
got tools, got a real scan tool?
is this a 5 buck code reader that misses most codes.
or a real one (ask for good tools)
if a real tool, it will show all codes, and you must know them all
or go astray. P0841? present? too>?

42RLE box.::: one code only, my guess.

i have this car, (m/t) and full FSM, on it,
Ill decode this and tell you what page to read in the FSM
it shows what to do next and the tests to prove this out.
P= power train
P1 means factory code ( so dont read ford codes)
SOLENOID SWITCH VALVE LATCHED IN TCC POSITION
TCC means torque converter clutch. lock up device. failure.
that means transmission, (id didnt say its bad)
the transmission on your car is automatic, unlike my stick
it has a TCM brain, hidden in the PCM brain
but its real and there. for sure. inside.
and it shifts for you, this brain,. in DRIVE

here is the 1st page on this code. in fsm book.

The Solenoid Switch Valve, an internal, hydraulically operated valve, controls the direction of the transmission
fluid when the LR solenoid is energized. When the solenoid switch valve is in the downshifted position and the
LR solenoid is energized, fluid is directed to the LR element for 1st gear. When the solenoid switch valve is In
the up-shifted position (2nd, 3rd, and 4th gear) and the LR solenoid is energized, fluid is directed into the
Lockup Switch Valve which controls the Torque Converter Clutch. When shifting into 1st gear, a special
sequence is followed to insure solenoid switch valve movement into the downshifted position. The LR pressure
switch is monitored to confirm switch valve movement. If the solenoid switch valve movement is not confirmed
(i.e. no LR pressure when the LR solenoid is energized), 2nd gear is substituted for 1st. No 1st gear (2nd gear is
substituted). The transmission Torque converter FEMCC operation is inhibited. MIL on after 5 min. of
substituted operation.
Monitor Conditions
When Monitored:
Prior to a shift into 1st gear.
possible causes:
RELATED DTC P0841 PRESENT?
(T16) TRANSMISSION CONTROL OUTPUT CIRCUIT OPEN
(T50) L/R PRESSURE SWITCH SENSE CIRCUIT OPEN
(T50) L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
(T50) L/R PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
INTERNAL TRANSMISSION
POWERTRAIN CONTROL MODULE

the book says have the dealer
do a full transmission check using there (unique) fancy tool..
seems to be good advice.

below is the interface tcm.<> box.
solenoid and read back switches.
if the trans is not bad, then this switch is bad (fibbing)
or the wires rusty there... re-seat them yet?


25790628-45ach20vyw31nj2wu4lwuewn-5-0.jpg

Jul 20, 2015 | Jeep Cars & Trucks

1 Answer

I have a 2005 dodge caravan the ingine light came on today the codes read p1776 and p0700 what does the codes mean


i'd go with the Transmission Control Module being the cause , either loose connection or worst case needs new unit

Oct 14, 2014 | 2005 Dodge Caravan

1 Answer

I have a 2000 Ford Taurus sedan and the back driver side window is the only one that has power, what could be the problem?


power at the back driver's door switch or at the driver's master switch? if power on the master switch cotrols the lr window then you most likely have bad master window switch. if the lr door switch is used to control the lr window then most like you have three bad window motors.

May 26, 2012 | 2000 Ford Taurus

2 Answers

What this code is p-1784


P1784-LR PRESSURE SWITCH SENSE CIRCUIT
This is a transmission fault code. Diagnosing it will require the DRB3 scan tool, or equivalent aftermarket scanner, and the transmission simulator tool.
---------------
Remove the VB(valve body) and the solenoid pack is easy to change and a shift kit comes with a non stick switch valve.In most of the cases is faulty solenoid pack causing this eror code.But there are other possibilities to.
P1784-LR PRESSURE SWITCH SENSE CIRCUIT

When Monitored and Set Condition:
P1784-LR PRESSURE SWITCH SENSE CIRCUIT

When Monitored: Whenever the engine is running.

Set Condition: The appropriate code is set if one of the pressure switches are open or closed at the wrong time in a given gear.

POSSIBLE CAUSES
LOSS OF PRIME P1791 PRESENT.
RELATED RELAY DTC

Feb 23, 2011 | 2000 Jeep Grand Cherokee

1 Answer

I have a melted wire coming from the back plug on my headlight switch . green and white wire. i also have 3 melted wires going to my trunck lid . from my lr tail light . dont know what to do . can u help ...


The problem is a short to ground in your running lights circuit. From your description, it seems likely that the short is somewhere in the wiring to your lr tail light. You need to replace those wires all the way from the tail light to the switch, and that should solve the original problem.

Feb 18, 2011 | 1992 Volkswagen Cabriolet

1 Answer

Trouble code p1784 on dodge grand caravan


found this on another page.....
Originally Posted by vasau viewpost.gif The vehicle came in with 2 trouble codes and complaint on a transmission shifting.
P1775 Solenoid Switch Valve Stuck in TCC.
P1784 LR Pressure Switch Circuit.
After clearing these 2 codes the van ran normal for about 20 minutes without any issue, but after, the problems came back with no codes.
LR Pressure Switch is always in "Open" position. Must be closed at Park, Rev and Neutral.
Could anyone explain to me how the switch works. Is this the solenoid pack or the LR Pressure issue?The L/R pressure switch should be closed in P/N only. The switch should open when put into REV if the trans is not in limp-in mode. All switches will stay CLOSED if the trans is in limp-in mode. Disconnect the trans 8-way connector at the solenoid pack. Key on scanner hooked up apply 12 volts to the L/R pressure switch pin in the 8-way connector and watch for the switch to change from open to closed. If it does change the SSV may be stuck in the TCC position. You will have to remove the valvebody and inspect the solenoid switch valve to know for sure. The pressure switch itself is in the solenoid pack. If you have an old solenoid pack changing it is easier and quicker than inspecting the valvebody. Perform your diag for fault P1784. I believe the pressure switch is also closed in 1st gear also. Hope this helps.

Jan 17, 2011 | 1996 Plymouth Grand Voyager

2 Answers

Code p1784 is pressure switch circuit:LR How to


you'll need to have a transmission shop check the wiring harness in the transmission first ,then they can repair it,this is not a job to be doing yourself,

Jan 26, 2010 | 2000 Dodge Dakota Quad Cab

2 Answers

1776 code the fix


1776 Chrysler Solenoid Switch Valve Latched in LR Position (this is a transmission issue which may involve replacing the valve body and solenoid pack; on some models there is a TSB on this problem so be firm with your dealer / Chrysler).

Oct 21, 2009 | 2003 Dodge Intrepid

1 Answer

"Where do I find the pressure switch circuit: LR"


There is a row of plugs beaneath the solenoid pack. One of those is a rev pressure port. If reverse is gone, I am betting on a broken internal part.

Apr 06, 2009 | 1996 Dodge Caravan

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