2013 Chevy Cruze 1.4 Turbo

Thomas Diagnostician Texas Posted   Latest   Edited  
Unsolved
Driveability
Electrical
2013 Chevrolet Cruze Eco 1.4L (B LUV) 6-spd (6T40)
P1516
P2101 — Throttle Actuator "A" Control Motor Circuit Range/Performance
U0100 — Lost Communication With ECM/PCM "A"
Reduced Power
No Acceleration

Have a 2013 Chevy cruze showing reduced power on cluster. Has codes p1516 Throttle actuator control module and P2101 Throttle Actuator position performance and U0100 Lost communication with ECM/PCM. Throttle body has been replaced. We are leaning more on the harness side of things here. There is a bulletin GM has put out about the ground cable at the battery terminal causing issues. Not having a good clamping force on the terminals. Checked the negative connection and cable seems to be good. Seeing if anyone has seen this before. 

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Caleb Diagnostician
Indiana
Caleb
 

What is the Vdrop on the ground cable while cranking? Do that first an let us know. Can you comm with the ECM? You must be able to if you can see TAC codes cause those only set in the ECM. I would also V drop all Powers an Grounds into the ECM. The TAC motor gets it power from the ECM. The TAC codes are relating to the motor control circuits an you have a U0100 so that could correlate to a loss…

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Raymond Mobile Technician
Michigan
Raymond
 

Thomas, lets start with a static test of the high speed data lines thru all modules by checking for 60 ohms plus or minus 10 % at DLC pins #6 and #14 preferably with a break out box and battery disconnected. if that checks out make note of codes and clear all codes and rescan see what comes back , I would also start most of my diagnostics by bringing in auxiliary ground wires via jumper cables…

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Timothy Owner/Technician
Wisconsin
Timothy
 

There is a bulletin about the negative battery cables on these. Just go to the dealer and get the updated one. the hidden corrosion inside the cable is the true culprit, so just eliminate it. They're cheap, and the dealer probably stocks it. Also, these are known for coolant wicking into the ECM harness. Disconnect the PCM and thoroughly investigate the connectors for moisture. I sometimes…

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Raymond Mobile Technician
Michigan
Raymond
 

Also wanted to add, if codes for throttle body comes back I would check all powers and grounds and reference voltages from PCM to throttle body at throttle body, I know this is not a Chrysler but even GM can be picky sometimes about OEM throttle body, just throwing that out there, HTH let us know your results

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Richard Technician
New York
Richard
 

I think you are on the right track with the battery cable. I have replaced a couple in the past on these models. Of course you should test for voltage drop first.

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Michael Owner/Technician
Texas
Michael
 

What are your fuel trims? Check the PVC tube at the turbo. You can block it of with plastic at the intake. I believe it sets because it at its max close position.

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