check engine/ no bus
Thread Starter
Junior Member
Joined: Jan 2009
Posts: 103
Likes: 0
From: Bonney Lake Wa
Year: 2000
Model: Cherokee
Engine: 4.0
my 00 cherokee check engine check came on, no bus came on, taqch stoped working, speedo stopped, horn stuck on, lights wouldnt shut off, locks started locking by themselves, then the gages started working again then would suddenly stop again.... PLEASE HELP!!!! used an obd2 and there was no code...
CF Veteran




Joined: Nov 2010
Posts: 5,841
Likes: 117
From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
First, freshen up your engine grounds. Grounds can be the cause of many an electrical "gremlin".
If grounds are okay/fresh, then a common symptom of a failing "crankshaft position sensor" is the NO BUS
What happens is the sensor shorts out and that shorts out the computer bus, therefore the message.
It is not uncommon for this sensor to fail and NOT set a code.
Try this. Unplug the connector for the crank sensor. You can do this at the sensor itself on the bellhousing, or easier is to unplug the connector under the hood near the firewall #6 injector.
By unplugging the crank sensor, you remove it from the bus. NOW check to see if the NO BUS message is gone from the dash.
If it is, you have smoking gun proof that the crank sensor is shorted and replacing it should get you rolling again.
If grounds are okay/fresh, then a common symptom of a failing "crankshaft position sensor" is the NO BUS
What happens is the sensor shorts out and that shorts out the computer bus, therefore the message.
It is not uncommon for this sensor to fail and NOT set a code.
Try this. Unplug the connector for the crank sensor. You can do this at the sensor itself on the bellhousing, or easier is to unplug the connector under the hood near the firewall #6 injector.
By unplugging the crank sensor, you remove it from the bus. NOW check to see if the NO BUS message is gone from the dash.
If it is, you have smoking gun proof that the crank sensor is shorted and replacing it should get you rolling again.
Thread
Thread Starter
Forum
Replies
Last Post
JayneCobb
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
26
Aug 11, 2020 03:22 PM
stimp774
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
20
Apr 16, 2017 03:46 PM
pet1
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
9
Sep 10, 2015 09:21 PM
Azzy
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
0
Sep 8, 2015 10:49 PM
sikkev
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
0
Sep 5, 2015 11:33 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)



