Clayton I have a 4/03 sterling truck with a caterpillar engine it's sending off a ICU 140 and no engine code

HI I'm Wayne

I will send your question to someone that deals in Cat engines

do not rate me as,it locks back to me

Thanks for asking your question. I will try and help you out.

Does the yellow check engine light come on when the key is turned to the on position?

Thanks for the information.

If the yellow check engine light does not come on when the key is turned to the on position and the engine will not start, there are only 2 things that can cause this.

The first and most common is the engine ECM is not getting the correct power and ground to function. The ECM should have power on pins 52, 53, and 70 of the rear most ECM connector. This is the truck side harness connector. 70 is the key switch wire. The grounds are on pins 65 and 67. You can remove the connector and check for power on these pins. If you do not have power on these pins, you most likely have a blown fuse in the electrical system. I would check all fuses first.

If you do have correct power and ground to the ECM, you most likely have a failed ECM. I have seen this many times over the years. To confirm the ECM is bad, you would need to install a known good ECM on the engine or you can take the ECM to the dealer to be tested. Unfortunately the ECM cannot be repaired. Replacement is the only option. I am sorry. I wish I had better news.

Please reply back if you need more help or have more questions. I am happy to assist.

Hey. I just wanted to see how things were going. Please let me know if you need more help. I am happy to assist. If my information was helpful, please leave a good or higher rating so that I receive credit. Thanks.

Thanks for the update. Keep me posted and let me know if you need anything else from me.

Hey. What question are you referring to?

I see. Yes. The engine does not need an ECM to run on ether. The ECM is located on the drivers side above the start. It's what the engine harness connects to.

No problem. Let me know if you need more help. I am happy to assist.

You are very welcome my friend. I am happy I could help.