After getting tired of pushing the VDC off button everytime I jump in the car. I decided to cut the power supply wire to the Yaw/G-rate Sensor to actively disable VDC, back up VDC, EBD, and couple other electronic stuff. Now having to sell the car, I reconnected the wire. The VDC still wont turn on...

What's the cause of this? The dash says "VDC off" and "SLIP". I've tried resetting ECU, and resplicing the wire as well as wiggling the harness. But no luck...

Any help would be appreciated. No flaming for cutting VDC off please, I'm a track guy, it actually hinders my lap times...

 

Have you tried resetting the ecu after reconnecting the wires? Other than that, I dunno...

 

Yes I did...

Any other suggestions? Or am I in the wrong section?

 

i'm assuming that you pushed the button to see if it would come back on, other then that i have no idea either

 

^^^^^^^^^^^^^ soooooo helpfull..... lol

 

.

 

Anyone? I really have to sell the car!! I'm hoping not to go to stealership to get my *** raped...

 

Hmmmm, okay here's an idea... Get a multi-meter. Tone out one end of the VDC harness to the other. That'll make sure you have continuity from the switch to the ecu. I know it's a pain, but the color codes should match up from one end of the harness to the other. That way you can rule out that it's bad wires.

If the wires are good, then next let's check the switch. An easy way to do that is to short the two wires out on eachother. If you get a completed circuit when the wires are shorted, then you know it's the switch. Or you can use your trusty multi-meter to tone out the switch itself for continuity.

If all that fails, then I'd have to assume there's something quirky going on with the ecu... And that I dunno about... I think Cipher can do ECU/BCU diagnostics...

 

that bites!

 

Resetting the ECU probably wont do anything, you need something like a Consult or Cipher to be able to access and reset the BCM or ABS system.

Other than that try driving around, the system needs to see it is working before the light goes off, it doesn't just go off because you reconnected it

 

I think its like the airbag light when you pull the driver seat and start the car... it needs to be reset by a dealer.

 

Check your fuse panel. When you "cut" the wire you may have created a short and popped a fuse. I also know the connection must be made first and then the ignition turned on. It can't be connected after the ignition is turned on. Hope this helps.

Bob

 

I'll try your first idea, but can you elaborate on your 2nd idea? I don't quite interpret the switch idea...

Yeah, resetting ECU doesn't work. I figured it was BCM I might have to reset. Is it possible to reset BCM somehow without cipher/consult?

Been daily driving it for two days already, no luck so far...


That was my initial idea, but I checked the fuses, all nothing seems to be broken.I checked both in the battery box and the driver's side kick panel fuses...


Thanks for the ideas and input guys, keep them coming

 

The switch (I haven't looked at the VDC switch personally) should have two leads coming off it. Maybe three. Hook your multimeter to the neg- & pos+ lead to check the switch for continuity when the switch is on, and a broken circuit when the switch is off. It's a "momentary switch" but it should still break the circuit and enable the circuit on your multimeter.

 

Have you driven the car at all? I have seen this happen on a dyno before. You need to drive it a bit for it to clear. If that isn't it, then I dunno.

 

You have to reset it in order to make it work and it can be done manually just don't know the procedure. Try searching thats what I did when I accidentally triggered my air bag light. It was surprisingly easy to reset maybe the same procedure for the VDC come to think of it. And no you don't have to take it to a dealer as mentioned earlier.

 

From the FSM

TROUBLE DIAGNOSIS PFP:00004
Fail-Safe Function NFS000IK
VDC/TCS SYSTEM
In case of Throttle Control System trouble, the VDC OFF indicator lamp and SLIP indicator lamp are turned
on, and the condition of the vehicle is the same as the condition of vehicles without VDC/TCS equipment. In
case of trouble to the Throttle Control System, the ABS control continues to operate normally without VDC/
TCS control.
CAUTION:
If the Fail-Safe function is activated, then perform the self diagnosis for VDC/TCS/ABS control system.
ABS, EBD SYSTEM
In case of the electrical problems with the ABS, the ABS warning lamp, VDC OFF indicator lamp and SLIP
indicator lamp will turn on. In case of the electrical problem with the EBD, brake warning lamp, ABS warning
lamp, VDC OFF indicator lamp and SLIP indicator lamp will turn on. Simultaneously, the VDC/TCS/ABS
become one of the following conditions of the Fail-Safe function.

For ABS trouble, only the EBD is activated and the condition of the vehicle is the same condition of vehicle
without TCS/ABS equipment.
NOTE:
ABS self diagnosis sound may be heard. That is a normal condition because a self diagnosis for “Ignition
switch ON” and “The first starting” are being performed.

For EBD trouble, the EBD and ABS become inoperative, and the condition of the vehicle is the same as
the condition of vehicles without TCS/ ABS, EBD equipment.
How to Proceed With Diagnosis NFS00045
BASIC CONCEPT

Most important point to perform diagnosis is to understand systems (control and mechanism) in vehicle
thoroughly.

It is also important to clarify customer complaints before inspection.
First of all, reproduce symptom, and understand it fully.
Ask customer about his/her complaints carefully. In some cases,
it will be necessary to check symptom by driving vehicle with
customer.
NOTE:
Customers are not professionals. Do not assume “maybe customer
means...” or “maybe customer mentioned this symptom”.

It is essential to check symptoms right from beginning in order to
repair a malfunction completely.
For an intermittent malfunction, it is important to reproduce
symptom based on interview with customer and past examples.
Do not perform inspection on ad hoc basis. Most intermittent
malfunctions are caused by poor contacts. In this case, it will be
effective to shake suspected harness or connector by hand.
When repairs are performed without any symptom check, no
one can judge if malfunction has actually been eliminated.

After diagnosis, make sure to carry out “erase memory”. Refer to
BRC-119, "ERASE MEMORY" .

For an intermittent malfunction, move harness or harness connector
by hand to check poor contact or false open circuit.

Always read “GI General Information” to confirm general precautions. Refer to GI-3, "General Precautions"



ERASE MEMORY
1. Turn ignition switch OFF.
2. Start the engine and select “SELF-DIAG RESULTS”.
3. Touch “ERASE MEMORY” on the CONSULT-II screen to erase the error memory.
CAUTION:
If the error memory is not erased, perform applicably diagnosis.
4. Perform self-diagnosis again, and make sure that diagnostic memory is erased.
5. Drive vehicle at 30 km/h (19MPH) or more for approximately 1 minute as the final inspection, and make
sure that the ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp turn off.
NOTE:
VDC OFF switch should not stay “ON” position.


ABS WARNING LAMP, VDC OFF INDICATOR LAMP, SLIP INDICATOR LAMP INSPECTION
1. Make sure ABS warning lamp, VDC OFF indicator lamp (when VDC OFF switch is OFF), and SLIP indicator
lamp turns ON approximately 1 second when the ignition switch is turned ON. If they do not, check the
VDC OFF indicator lamp and then VDC OFF switch. Refer to BRC-147, "VDC OFF SWITCH" . Check
CAN communications. Refer to “CAN Communication Inspection”. If there are no errors with VDC OFF
switch and CAN communication system, check combination meter. Refer to BRC-146, "CAN Communication
System" .
2. Make sure lamp turns off approximately 1 second after the ignition switch is turned on. If the lamp does
not turn off, conduct self-diagnosis.
3. With the engine running, make sure VDC OFF indicator lamp turns on and off when VDC OFF switch is
turned on and off. If the indicator lamp status does not correspond to switch operation, check the VDC
OFF switch system. Refer to BRC-147, "VDC OFF SWITCH" .
4. Make sure ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off 2 seconds after
the engine is started. If ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp have not
turned off 10 seconds after the engine has been started, conduct self-diagnosis of the VDC/TCS/ABS
control unit.
5. After conducting the self-diagnosis, be sure to erase the error memory. Refer to BRC-119, "ERASE MEMORY"

 

I see what you mean now, the VDC switch under the column, I assumed something else. I'll test that out as well.

Been driving 3 days straight now. All kinds of driving, rush hour, normal driving, spirited... no results.

So apparently, I need consult-II to reset VDC or even to self-diagnosis. Which means stealership. Isn't there a way like the ECU reset with key on and off and pushing the accel pedal? so much easier

 

Shoulda never cut it. Pressing a button is not that big of a deal. You probably do that all the time roll your windows down and lock the door.

You have to turn a key to make the car start, yeah?

Sorry. Just thought it was silly of you to do and hope everything works out for you.

 

There is a way to do it just try searching or if you want to be lazy like me go to autozone and they can hook it up to their diagnostic tool and they will tell you how to reset it for free b/c they are not allowed to push the buttons or some crap like that, lol.