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Mouse did me bad. P1694 code

E

Extinction

NAXJA Forum User
Location
Pennsylvania
So here's my issue. I was welding the driver side front leaf spring mount. Checked the floor area before and found it to be under the rear seat where no carpet or padding was. Well ended up a mouse had a nest up against the ssides didn't see. It caught fire and the wired all melted coming from the front going to the back, to the passenger side from there and to the fuel pump. When the fire happened I got it out and noticed the wires there. Not knowing if they were OK in the wrap I hooked the battery back up and turned the ignition on to check the blinkers. Those and the brake lights didn't work. I then found the wires to be pretty melted once ripping rhe seat and carpet up. Spend a few hours separating and replacing each wire there one by one. All wires soldered in. Hooked the battery up thinking everything will be good. Brakes worked. Fan turned on, no guages, no blinkers, no start. What could have happened here besides all the wires which I replaced?
 
A short to ground from faulty or damaged wring can cause a P1694.

P1694 Fault In Companion Module. No CCD/J1850 bus messages received at the power train control module (PCM) from the AisinWarner Transmission Control Module (TCM). P1694 will set if no CCd bus messages are received from PCM for 20 seconds or invalid messages are received for 20 seconds.

Possible Causes
- Faulty Crankshaft Position Sensor.
- Faulty TCM.
- CCD Bus (-) circuit open between PCM and TCM.
- CCD Bus (+) circuit open between PCM and TCM.
- Transmission CCD bus wiring damaged
- CCD Bus (-) circuit open between PCM and TCM.

In the past there have been reports that the Transmission Control Module (TCM) failures and Keyless Entry (RKE) module failures have caused similar symptoms and faults. Note that the RKE module is on the CCD Bus. Try unplugging the RKE module and try unplugging the TCM and see if the NoBus message goes away and all gauges work. If so, replace the TCM or RKE. Engine sensor wire harness/wire plug issues, a faulty CPS, or a faulty TCM should be the first suspects for a P1694.

Inspect and test the CPS wire plug and wire harness for loose/bent/damaged connection pins, corrosion, and damaged wires. Inspect, clean, and tighten firmly the two ground wires at the ignition coil. They also are ground locations for the transmission computer.

Read this >> http://www.naxja.org/forum/showthread.php?t=63167
 
Tim_MN said:
A short to ground from faulty or damaged wring can cause a P1694.

P1694 Fault In Companion Module. No CCD/J1850 bus messages received at the power train control module (PCM) from the AisinWarner Transmission Control Module (TCM). P1694 will set if no CCd bus messages are received from PCM for 20 seconds or invalid messages are received for 20 seconds.

Possible Causes
- Faulty Crankshaft Position Sensor.
- Faulty TCM.
- CCD Bus (-) circuit open between PCM and TCM.
- CCD Bus (+) circuit open between PCM and TCM.
- Transmission CCD bus wiring damaged
- CCD Bus (-) circuit open between PCM and TCM.

In the past there have been reports that the Transmission Control Module (TCM) failures and Keyless Entry (RKE) module failures have caused similar symptoms and faults. Note that the RKE module is on the CCD Bus. Try unplugging the RKE module and try unplugging the TCM and see if the NoBus message goes away and all gauges work. If so, replace the TCM or RKE. Engine sensor wire harness/wire plug issues, a faulty CPS, or a faulty TCM should be the first suspects for a P1694.

Inspect and test the CPS wire plug and wire harness for loose/bent/damaged connection pins, corrosion, and damaged wires. Inspect, clean, and tighten firmly the two ground wires at the ignition coil. They also are ground locations for the transmission computer.

Read this >> http://www.naxja.org/forum/showthread.php?t=63167
Click to expand...
Just wondering if you read my whole post? I tend to be long on them and was told people don't even read the whole thing. I like to give all the details. Would the CPS short out or burn up from the wires that caught fire? TCM? PCM? I turned the key on after to check the blinkers and brakes. Once they didn't work I knew the wires were burnt. I don't know if me turning the key to the on position did it or the fire itself. I also am not the electronic tracking guru. If I know what the problem is I can change it.
 
Diagnostics is what will locate the fault.

No one can say measure 6.5 inches down the blue wire, and that is the problem, you need to invest the time and effort required to troubleshoot and diagnose.

A no-start can be a faulty CPS, and/or it can be 12 volts positive short circuited to ground from heat, defective wire insulation, or from rodents.
 
Last edited:
The rodent may have taken offense to your burning down of his house, relocated to another part of the Jeep, built a new house, and chewed up some additional wiring out of spite. At least that is how it would work in my world.

Best of luck.
 
Anak said:
The rodent may have taken offense to your burning down of his house, relocated to another part of the Jeep, built a new house, and chewed up some additional wiring out of spite. At least that is how it would work in my world.

Best of luck.
Click to expand...
I'm think the nest is possibly from this time last year. We didn't have any beech nuts this year being the beech trees are all dying or dead. There was no sign of the rodent. And only maybe 3 or 4 shells chewed in the nest. The stockpile he had in the corner is what caught fire. I'm up and down every weekend. I'm sure he moved out. They filled my side by side airbox with beech nuts one year there also. In 1 day.
 
You are all stereotyping mice.
 
I am profiling them too.

If I get within range I will exterminate them.

Call it speciesism and speciescide.

In fact, I have my sights on the entire rodent order, so you could call it "ordercide".
 
Anak said:
...so you could call it "ordercide".
Click to expand...
Ordercident.

Better get outside tonight for the beaver moon too. Surfers may be pissed, but, we'll finally be rid of that obnoxious buck toothed orb in the sky!
 
Tim_MN said:
A short to ground from faulty or damaged wring can cause a P1694.

P1694 Fault In Companion Module. No CCD/J1850 bus messages received at the power train control module (PCM) from the AisinWarner Transmission Control Module (TCM). P1694 will set if no CCd bus messages are received from PCM for 20 seconds or invalid messages are received for 20 seconds.

Possible Causes
- Faulty Crankshaft Position Sensor.
- Faulty TCM.
- CCD Bus (-) circuit open between PCM and TCM.
- CCD Bus (+) circuit open between PCM and TCM.
- Transmission CCD bus wiring damaged
- CCD Bus (-) circuit open between PCM and TCM.

In the past there have been reports that the Transmission Control Module (TCM) failures and Keyless Entry (RKE) module failures have caused similar symptoms and faults. Note that the RKE module is on the CCD Bus. Try unplugging the RKE module and try unplugging the TCM and see if the NoBus message goes away and all gauges work. If so, replace the TCM or RKE. Engine sensor wire harness/wire plug issues, a faulty CPS, or a faulty TCM should be the first suspects for a P1694.

Inspect and test the CPS wire plug and wire harness for loose/bent/damaged connection pins, corrosion, and damaged wires. Inspect, clean, and tighten firmly the two ground wires at the ignition coil. They also are ground locations for the transmission computer.

Read this >> http://www.naxja.org/forum/showthread.php?t=63167
Click to expand...
Tim,
I haven't had a chance to look at it was gone away for the weekend. Just crawled underneath and found the CPS and looked up the wire. Looks like it cooked from the inside out about 8 inches up from the CPS. I'm crossing my fingers at this point that this is the problem. Jeep dealer is right down the hill from my workplace so tomorrow I'm going to grab one and hope that is the problem. I never thought about anything happening besides the rear lights, defrost, speakers and fuel pump not working when I turned the key to on to check to see if the blinkers worked. Thoughts?
 
So I went to the Jeep dealer parts counter today. Got a price of $236. For the crank position sensor. Then he told me they don't have one and they can't get one because they don't make them anymore. So off to NAPA I went. Talked to the guy at the counter and he told me he would give me 2 phone numbers of local garages that work on Jeeps for them to verify that their sensors will work. There's a 36 month 36,000 mile warranty on it so I'm guessing it should be good and hoping I have no issues with it. Will be here tomorrow.
 
phydeaux33 said:
Unfortunately, sensors are a hit and miss on quality. NTK/NGK are about your best bet, per a friend (Dodge/Jeep service tech) if it is unavailable MOPAR, NTK is the first option with Echlin second. The following site is for NTK, NAPA is Echlin.

Part Finder - NGK Spark Plugs

Search by application to find the part you need from NGK or NTK
ngksparkplugs.com ngksparkplugs.com
Click to expand...

+1

Aftermarket is hit and miss.

Likewise for junkyard parts.

I figure I have about the same chances with junkyard parts as I do with aftermarket, but at least the junkyard parts are less expensive.
 
ITS ALIVE!!!!! The NAPA CPS is in there an I'm going to order a backup NTK for under the seat. When I first turned the key I had the same problems. P1694 CODE, Aux fan running, no blinkers, no start, and no guages working. Rechecked the fuse box. Had 2 fuses blown. Which weren't the first day. Combination Flasher and Fuel Pump Relay. Changed them and it started right up and so far everything is working.
 
Good that you got it running. Fuses don't blow for no reason, and a CPS shouldn't blow a fuse, I would do some investigating and testing.

I carry a spare brand new CPS in both my XJ's.
 
Glad you got it figured out.

Thank you for posting up your success.
 
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