When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!ZJ (93-98), WJ (99-04), WK (05+)
All ZJ/WJ/WK specific tech questions asked here!
hi guys, my jeep 1995 grand cherokee 5,2 Limited us version
1-where is OBD socket
2-no images on both screens,how to fix
3-What is the missing relay in the photo
Ok. The VIC (under HVAC) is known to have solder joints break as well as wires. You can unplug it and clean the connectors and see if that helps. If not you can either take it apart and try to solder the connections or buy a new one, or get a cubby out of a 2wd zj. I think some base 4x4s also had a cubby but not sure. The OHD (Over head display in ceiling) has the same faults. to take the overhead console out there is a screw in the front on the bottom. I didnt find it until i broke it. If you take the screw out the OHC will slide back off of its clips and yo ucan then see the top of it with all the wires and connections. Hope this helps!
You should be able to read the obd coded by turning the ignition key on and off 3 times without starting the engine stopping at the run position. Then all dashlights will go out and the check engine light (see picture) will flash the obd codes. The first code is 12 (1 flash a pause and then 2 quick flashes = 12) saying that it has connected or that the battery has bern disconnected or something like that, you can look that up) then the fault codes will start, the completed test code is 55. The OBD plug is not the same as the 13? pin plug in most latter model vehicles. I have the plug pointed out in the engine pictures. Where exactly are those relays llocated?
Last edited by tony270; Mar 6, 2017 at 11:02 AM.
Reason: spelling
From what understand the manufacturer dealerships are the only ones with the scan tools that can read the body control module and transmisson control unit.
To reset the ECU, relearn driving habits and resets clears OBD Fault codes.
Remove the positive terminal from the battery post. Then ground out the positive terminal to the negative battery terminal for 30 seconds (if it doesn't reach use a jumper). Now put the positive terminal back on the positive post. Now turn the on position without out starting the vehicle then turn the headlights on and off, now turn the key off.
tony, the relays are located in the glove box under the removable floor.
You can buy a scan tool to read the engine odb and i think you can get one for the body/trans one as well. the ports are different because our system is OBD I vs OBDII
Ok. The VIC (under HVAC) is known to have solder joints break as well as wires. You can unplug it and clean the connectors and see if that helps. If not you can either take it apart and try to solder the connections or buy a new one, or get a cubby out of a 2wd zj. I think some base 4x4s also had a cubby but not sure. The OHD (Over head display in ceiling) has the same faults. to take the overhead console out there is a screw in the front on the bottom. I didnt find it until i broke it. If you take the screw out the OHC will slide back off of its clips and yo ucan then see the top of it with all the wires and connections. Hope this helps!
From what understand the manufacturer dealerships are the only ones with the scan tools that can read the body control module and transmisson control unit.
To reset the ECU, relearn driving habits and resets clears OBD Fault codes.
Remove the positive terminal from the battery post. Then ground out the positive terminal to the negative battery terminal for 30 seconds (if it doesn't reach use a jumper). Now put the positive terminal back on the positive post. Now turn the on position without out starting the vehicle then turn the headlights on and off, now turn the key off.
That won't hurt any of the other electronic (power windows, power locks, airbag) will it??
From what understand the manufacturer dealerships are the only ones with the scan tools that can read the body control module and transmisson control unit.
To reset the ECU, relearn driving habits and resets clears OBD Fault codes.
Remove the positive terminal from the battery post. Then ground out the positive terminal to the negative battery terminal for 30 seconds (if it doesn't reach use a jumper). Now put the positive terminal back on the positive post. Now turn the on position without out starting the vehicle then turn the headlights on and off, now turn the key off.
Yeah..., about that procedure/description for terminal shorting, be careful there, be clear about what's being shorted because...poof!
Please don't ground the positive terminal to the negative terminal. Instead, remove the positive cable clamp from the positive battery post, wait a few seconds then, for a 30 second interval, touch-together the positive cable clamp to the negative battery post/clamp.
1. There is NO OBD socket... that didn't happen until they started requiring OBD-II beginning with 1997 models. HOWEVER... by putting your key in the ignition, and turning the key from OFF to ON (do NOT start) five times and stopping on ON the fifth time, you'll need to watch your 'CHECK ENGINE' light flash... it will flash a certain number of times for the first number, and then pause and do it again a certain number of times for the second number (will be a 2-digit "Morse Code")... If the number is "55", then that means you're all good and have no codes at all. NAGCA (National Grand Cherokee Association) has a list of said codes.
2. You'll want to look at the fuses and find out which one controls the displays, and replace if it it's broken.
3. Jeep put the same relay box in every ZJ of that era, just left out relays for features your Jeep does NOT have (i.e., front fog lamps).
Some questions about my zj
NAGCA (National Grand Cherokee Association) has a list of said codes.