Anybody ever dealt with these codes before?

P1574 ASCD vehicle speed sensor
P0500 vehicle speed sensor 'A'

C1145-00 ABS something something

 

dang, no one?

 

Friday bump

 

It seems like Im having some electrical issues after I started using Ecutek. Can anyone else confirm if they are also having electrical issues due to Ecutek? I'm getting random codes popping up like whack a mole

 

My car also becomes sluggish

 

FSM indicates that C1145 refers to an issue with the Yaw Rate Sensor. It could be a short or broken wire.

The other codes are as you noted, FSM states that they indicate a disagreement between the speed signals coming from the dash speedo and the TCM. It is possible there is some wiring damage under the dash or around the center console.

I dont think the ECU-Tek tune would cause any of this.

 

Thanks for your response, beefychicken.

Is there a way to confirm that the problem is from wiring damage to those areas?

 

Only thing I can think of is to visually trace the wires looking for something loose or damaged. Look in areas where some recent work may have been performed. Not really sure on an exact area or problem.
I can look in the FSM later today and see what the recommendations are.

 

Please beefychicken. I'm still getting these codes!

 

I tried unhooking my zeitronix

I also uninstalled my Fortin remote start

I also unhooked my air suspension wiring

But still, the code is there intermittently.

 

I did see that whoever worked on my car last, didn't bolt down the wiring harness that runs next to the driver's side header. It was flapping helplessly and intermittently touching the headers. I tied it down and put some aluminum foil in between as a temporary measure

 

Did you check the wires that were on the header for any damage or melting? Especially since the codes are intermittent. Typically, an intermittent issue is wiring related, most of the computers either work or they don't.

Regarding the codes being intermittent, do the codes go on and off together? Like when one is there, the other two also show up and when one clears, the other two clear also?

C1145 refers to Yaw rate sensor is malfunctioning, or the yaw rate sensor signal line is open or shorted. Pretty much all the FSM says is to check power and ground wiring between the Yaw sensor and the ABS unit.

Disconnect the battery anytime you are connecting or disconnecting the plugs.

Turn off the ignition switch, go to Yaw rate/side G sensor Connector M143 Terminal 4 voltage to Ground, should be Approx. 0 V

Turn on the ignition switch, go to Yaw rate/side G sensor Connector M143 Terminal 4 voltage to Ground, should be Battery Voltage

Turn off the ignition switch, go to Yaw rate/side G sensor Connector M143 Terminal 1 to Ground, should have continuity to ground

P0500 refers to the vehicle speed sensor (VSS) At 20 km/h (13 MPH), ECM detects the following status continuously for 5 seconds or more: The difference between a vehicle speed calculated by a output speed sensor transmitted from TCM to ECM via CAN communication and the vehicle speed indicated on the combination meter exceeds 15km/h (10 MPH).

P1574 says the ECM receives two vehicle speed signals via the CAN communication line. One is sent from “unified meter and A/C amp.”, and the other is from TCM (Transmission control module). The ECM uses these signals for ASCD control. Refer to EC-83, "System Description" for ASCD functions.

The speed signals are on the data bus, one signal comes from the TCM to the ECM and the other comes from VSS via the ABS unit to the ECM.

Both of the speed signals are sent from their source to destination via the data bus.

If the data bus were damaged, I believe you would have many other problems, someone else reading this, please jump in and confirm or deny this statement regarding the data bus.

 

Wow that is extensive and detailed. I will dissect each part of your post and look into the issue when I regain my stamina, beefychicken!