1.NexCruise Installation: Diagnosing and Solving Check Engine Light Problems

1.NexCruise Installation: Diagnosing and Solving Check Engine Light Problems

🚨 Check Engine Light During NexCruise Installation

🔰Introduction

The Check Engine Light may appear on your dashboard during or after installing NexCruise. It looks something like this:


A healthy vehicle is not expected to show this light. If this has appeared during/after your installation of NexCruise,

🔎Observations

Turn ON the car and see the engine RPM.

Is it above 1000RPM?

Yes? It is still not getting the needed A-pedal signal. See first fix in list below.

Below 1000 RPM?

No? This is good news. Proceed to check the next point.

🧾Common Causes and Fixes

A-pedal cable was disconnected when the car was on 

🛠️Diagnosis

  1. Press the A-pedal.
  2. Does the car respond?
  3. Is the RPM below 1000?
✅ Yes:
No action needed! The light came because the A-pedal was briefly disconnected.
It will disappear after a few engine restarts.
⚠️ No:
Still not getting the A-pedal signal → proceed to Rectifications List below.

✨Solution 

Sometimes, we dont wait long enough for VCU to switch off internally before touching the A-pedal connection. This triggers the A-pedal flag. However if everything else is correct, although the errors will be logged, but its is harmless and check engine light will disappear in a short duration.
Idea
A failsafe but lengthy idea is, to always make sure the car is totally turned off before installing or removing the NexCruise. That will make sure you never trigger this particular reason.

VCU cable issue 

🛠️Diagnosis

The VCU expects a certain signal on the Accelerator pedal input. Normally it is given directly by the sensor within the A-pedal. But during installation of NexCruise, when we disconnect the A-pedal, if the signal is missing for any reason, the VCU logs it as an error and the car shows the "Check Engine" light.

These are the flags that are normally raised :
  1. A-pedal undervoltage on pin 1
  2. A-pedal undervoltage on pin 2.

✨Solution 

The VCU cable isn't securely connected
Did it "click" in place?
Verify it again. And Deactivate the NexCruise system using the bypass button. and see that  It should respond properly in the bypass.
Info
Refer here to see how to "Bypass NexCruise".
Once it works in the bypass , Activate NexCruise again and see if this solved the problem.


software issue 

🛠️Diagnosis

The firmware in your NexCruise is of a different car.
You can verify this from the Car.Os app. Go to Configure > Software Option and see the car for which the NexCruise is configured. It must match the car in which it is installed. 

✨Solution 

Call our customer support if there is a mismatch. 

OBD cable issue

🛠️Diagnosis

Check weather the 12v light is turning on in the Unit when connecting to the OBD cable.


✨Solution

If light is not turning on then reconnect the OBD cable properly and check if the 12v light in unit is turning on, if not replace the OBD cable .

Unit faulty 

🛠️Diagnosis

After going through all the above the Unit is not turning on or the engine light is not turning off, we come to conclusion that the unit is faulty.

✨Solution 

Replace the Unit in this case.

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