What this code is p-1784 - 2000 Jeep Grand Cherokee

Hi,

a code p1781 means that the pressure switches are opening and closing at the wrong times in one of your gears. I think the best thing to do would be to get the diagnosis for fixing the issue from your dealer but then get the actual work done from a mobile mechanic who should be a lot cheaper to use.

Thank you.

Hi there my name is Brandon I am a electronic and mechanical engineering technician I am the man that mechanics bring cars too when they cant fix them or cant find the electric problem I am a 4 generation mechanic sound like you are lock out of the transmission com! You have to reset it but I need to to more information so I can tell you what to do to fix it

Well code 500 is for the speed sensor which could cause most of the other codes.
I would probably replace the speed sensor in the trans and check the connections, clear the codes then drive it again and see how many codes come back.

P1784 indicates a transmission mechainical failure, it must be diagnosed further to find out exactly the cause of the failure.

P1784 = Transmission Mechanical Failure - First And Reverse

Need to check fluid levels, pressure fluid trans and, if isnt work finally overhouling to check solenoids.

DTC 1784: LOW-REVERSE PRESSURE SWITCH
1.Remove transaxle relay from connector. Turn ignition on. Install scan tool and observe low-reverse pressure switch condition. Apply battery voltage to transaxle relay connector terminal No. 8. If low-reverse pressure switch stays off, go to next step. If low-reverse pressure switch turns on, go to step 4 .

2.Raise vehicle enough to allow drive wheels to spin freely. Test low-reverse clutch hydraulic pressure. See HYDRAULIC PRESSURE TESTS under TESTING. If low-reverse clutch pressure test is not within specification, internal transaxle failure exists. If low-reverse clutch pressure test is within specification, observe scan tool.

3.If low-reverse pressure switch turns on, trouble code is intermittent. Check wire harnesses and connectors for damage or poor connection. If low-reverse pressure switch does not turn on, replace solenoid and pressure switch assembly. Recheck trouble codes. If trouble code resets, replace TCM.

4.Check and repair wiring harness between transaxle relay connector and solenoid and pressure switch assembly connector. If wiring harness is okay, check wire between TCM connector terminal No. 10 and solenoid and pressure switch assembly.

5.If wire between TCM connector terminal No. 10 and solenoid and pressure switch assembly is okay, check TCM and solenoid and pressure switch assembly connectors. Repair connectors as necessary. If connectors are okay, recheck trouble codes. If trouble code resets, replace solenoid and pressure switch assembly. Recheck trouble codes. If trouble code resets, replace TCM.

P0700-The Transmission Control Module (TCM) monitors the malfunction of sensors and actuators relating to transmission control. When the TCM detects a malfunction with the control, a signal is send to the Engine Control Module (ECM) to trigger the Engine Light or Service Engine Soon light. The ECM stores the P0700 code and it means the TCM detected a malfunction with the transmission controls.

I would try disconnecting he battery and letting it sit for 5 minutes, then hook it back up to see if they return-the 700 code is probably related to the 1784 code, that seems to be your main issue.

hallo
all the foults means problems with transmission control sistem
Marko

Transmission Mechanical Failure - First and Reverse

When i play any cd in the cd player i get an Error message .Also my right turn signal sometime stayon instead of flashing when i am making a right turn.

These are electrical codes,please unplug the battery cable of the car for about 30min and then plug it back .......if the light are then take it mech and get it checked...........