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 Post subject: C107C & C1404 '08 KK
PostPosted: Sun May 03, 2020 6:18 pm 
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Location: East Texas
So first I have to say there's great information and topics on here. This is my first time posting, and hope to get some help.
I've had an '08 KK Sport 4x4 (104k miles) for a while, but hasn't really been driven as I had a company vehicle.
I was recently laid off, and am trying to get it back on the road.
I've fixed quite a few issues, but am running into a dead end regarding C107C and C1404 codes. I pulled them from a Bluetooth obd2 reader using OBD Jscan and also a traditional code reader.
So far, I've replaced all 4 wheel speed sensors and brake pedal switch. During the course of getting it ready I also replaced all 4 tires, and brake pads all around.
Once I've read the codes, I clear them and they both come back up active immediately.
Mainly I'm after fixing the ABS/ESP since it affects safety, and the 4x4 can wait a while if need be.
Much appreciation ahead of time for reading this post and sharing any insight you may have.

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 Post subject: Re: C107C & C1404 '08 KK
PostPosted: Wed May 06, 2020 4:16 am 
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C107C brake pedal switch 1/2 stuck.
This can be a problem with the brake pedal switch.
This can happen when you install a new switch and the internal cam pops out before it is in place.
The brake pedal switch is a 1 time use. Meaning if removed it has to be replaced.
When replacing it do not allow the plunger to pop out before it is in place. Once in place release it against the brake pedal stop/push pad.
But, it can also be an issue with the ABS, wires, and more.

C1404-Transfer case range position sensor circuit low.
Sensor input voltage is below a specified value.
Check for 5V at the transfer case motor Pin 1.

_________________
07 KA Light Khaki, Manual trany.
2.5" Adjust-A-Strut JBA lift, Euro taillights,
Home made; Front Tilt Hood, Roof Rack, RAM Air, & CAI.
ESP Off Switch
Take a ride on the Trō side!

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 Post subject: Re: C107C & C1404 '08 KK
PostPosted: Thu May 07, 2020 10:46 am 
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Joined: Sat Jan 26, 2019 8:13 pm
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Location: East Texas
Thanks for the reply. I installed the new brake pedal switch per instructions and as you stated. Still have the issues. I'm honestly thinking it could be wiring related as I shook around some wires on the passenger side under the hood to see if anything seemed off. Once when I started the vehicle it displayed esp off, then wouldn't do it again.
Any tips on where or how to start tracking down wiring issues?
Also, thanks for the input on the case sensor, I read the sensor voltage using the Jscan app and it was 4.9-5. I'll check is physically with a meter soon.


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 Post subject: Re: C107C & C1404 '08 KK
PostPosted: Fri May 08, 2020 5:11 am 
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Are fuses M1 and M37 OK?
Check for B+ 12V on pin 1 of the brake switch harness.
Are your brake lights "on" when the pedal is not pressed? Are they "on" when depressed?

Ignition off.
Measure the Ohm between the ground circuit terminal (pin 6) and the Brake Signal 1 circuit terminal (pin 5) in the brake switch.
Apply and release the brake switch while monitoring the ohmmeter.
The resistance should change from below 5.0 ohms to an open circuit.

Measure the Ohm between ground terminal (pin 6) and the brake signal 2 circuit (pin 4) in the brake switch harness connector. The resistance should be above 100 ohms.

_________________
07 KA Light Khaki, Manual trany.
2.5" Adjust-A-Strut JBA lift, Euro taillights,
Home made; Front Tilt Hood, Roof Rack, RAM Air, & CAI.
ESP Off Switch
Take a ride on the Trō side!

Image


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 Post subject: Re: C107C & C1404 '08 KK
PostPosted: Mon Jun 29, 2020 3:57 pm 
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Joined: Sat Jan 26, 2019 8:13 pm
Posts: 5
Location: East Texas
Sorry for the delay in responding, moving and life takes precedence.

As for the fuses, both are fine and in working condition.
The brake lights turn on and off as they're supposed to when operating the pedal.
When measuring the ohms, I see the resistance change as you noted.
When checking ohms between pins 6 and 4, it was indeed above 100.

One thing I noticed when doing these steps, when I unplugged the harness from the brake pedal switch, the ABS and ESP BAS lights turned off and the esp off message flashed on the dash. Could this be an indication that the new switch I installed could be bad or installed incorrectly?

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 Post subject: Re: C107C & C1404 '08 KK
PostPosted: Sun Jul 05, 2020 10:46 am 
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Joined: Sat Jan 26, 2019 8:13 pm
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Location: East Texas
Another update, I ended purchasing another brake like switch and it didn't correct the issue. I'm wondering if it could be the ABS module under the hood beside the TIPM.

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 Post subject: Re: C107C & C1404 '08 KK
PostPosted: Mon Jul 06, 2020 3:20 am 
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Will151 wrote:
Sorry for the delay in responding, moving and life takes precedence.

As for the fuses, both are fine and in working condition.
The brake lights turn on and off as they're supposed to when operating the pedal.
When measuring the ohms, I see the resistance change as you noted.
When checking ohms between pins 6 and 4, it was indeed above 100.

One thing I noticed when doing these steps, when I unplugged the harness from the brake pedal switch, the ABS and ESP BAS lights turned off and the esp off message flashed on the dash. Could this be an indication that the new switch I installed could be bad or installed incorrectly?

Hope you had the battery Neg cable off while working on your rig.
If not do so now for 10 minutes.
Will151 wrote:
Another update, I ended purchasing another brake like switch and it didn't correct the issue. I'm wondering if it could be the ABS module under the hood beside the TIPM.

Sent from my Pixel 3 XL using Tapatalk

Are you still getting the same codes?

_________________
07 KA Light Khaki, Manual trany.
2.5" Adjust-A-Strut JBA lift, Euro taillights,
Home made; Front Tilt Hood, Roof Rack, RAM Air, & CAI.
ESP Off Switch
Take a ride on the Trō side!

Image


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 Post subject: Re: C107C & C1404 '08 KK
PostPosted: Mon Jul 06, 2020 11:11 am 
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Joined: Sat Jan 26, 2019 8:13 pm
Posts: 5
Location: East Texas
While doing all of this, no I did not. Before installing another switch I did an overnight reset which included disconnecting the battery and unplugging the TIPM overnight. I'll disconnect the negative as you suggest to today and report back.

Yes, still getting the same codes even after clearing them.

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