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Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go hereXJ (84-01)
All OEM related XJ specific tech. Examples, no start, general maintenance or anything that's stock.
Hadn't driven her for a couple of weeks, jumped in and she wouldn't pull off. So I put her into 1-2 gear, then changed the gears manually between 1, 3 and drive.
It had happened once before, I unscrewed the grounding cable on the side of the engine near the dip stick. Then she worked again. This time I've tried the same thing with no result. I put the earth cable on a voltage meter to check if the bolts earthing, which it is.
I'm not really a mechanic, more a guesser, any one got any ideas of what to try next before taking things apart?
Do you have a check-engine light on? Any P7xx codes set? Fluid level looks good?
A 1996 won't have that inline fuse. The box in the first picture with the wide connector and purple sticker is your TCU. The good news is that the transmission is likely fine mechanically since you can manually shift. The two usual causes for trying to start in 4th are no power to the TCU or a bad #1 solenoid. It's very unlikely that the trans computer is bad. If you have a multimeter, I would start by disconnecting the TCU connector and doing some troubleshooting. Verify it's getting power on pins D14 and D16. Measure pins C14,C15,and C16 for the solenoids in the transmission which should have 11-16 ohms of resistance to ground. D3 and D7 should have a low resistance to ground (they connect back to the stud on the engine you mentioned before).
In your first picture, there is some blue/green corrosion on that one connector. While I'm not quite sure what that connector is, it might just be part of or all of your problem. It usually means a water leak is near.
Do you have a check-engine light on? Any P7xx codes set? Fluid level looks good?
A 1996 won't have that inline fuse. The box in the first picture with the wide connector and purple sticker is your TCU. The good news is that the transmission is likely fine mechanically since you can manually shift. The two usual causes for trying to start in 4th are no power to the TCU or a bad #1 solenoid. It's very unlikely that the trans computer is bad. If you have a multimeter, I would start by disconnecting the TCU connector and doing some troubleshooting. Verify it's getting power on pins D14 and D16. Measure pins C14,C15,and C16 for the solenoids in the transmission which should have 11-16 ohms of resistance to ground. D3 and D7 should have a low resistance to ground (they connect back to the stud on the engine you mentioned before).
Thanks for the advice, but ive given up. Im not a mechanic, and while testing something with a voltmeter doesn't require me to be one, I've got to many other cars to continously spend time on this one. So I'm going to sell her or scrap her for parts.
Thanks for the advice, but ive given up. Im not a mechanic, and while testing something with a voltmeter doesn't require me to be one, I've got to many other cars to continously spend time on this one. So I'm going to sell her or scrap her for parts.
I dont want to seem hasty here, but testing the fuse, and connector at the TCU could be easily done in less than 30mins
If the TCU has actually failed, it can be replaced with a used one for about $50 and once again, only a few minutes
both of those 2 options sound quicker, easier and more economically prudent than scrapping the vehicle
I dont want to seem hasty here, but testing the fuse, and connector at the TCU could be easily done in less than 30mins
If the TCU has actually failed, it can be replaced with a used one for about $50 and once again, only a few minutes
both of those 2 options sound quicker, easier and more economically prudent than scrapping the vehicle
I'd agree, but while she's a lovely truck and starts first time every time,... I don't have the time.
I checked every fuse in the engine bay, they're all fine. Started checking the TCU but without knowing which pins to check, I'd have to check all 32 pins. I know you mention which to check but there is no diagram i could find. Also I'm not a small man so getting into the foot well is a nightmare to be able to see what I'm doing.
My TCU failed in my 89. So I drove it with it unplugged for a while and shifter manually. It will not hurt nothing.
Finally went to a junk yard and found two TCU's. I got both for basically nothing. Put one in my Jeep and it started back shifting. Put the other one in my dash in case this one ever goes out.
Auto trans not changing gear :(
