Humvee / HMMWV - 4L80-E TCM Diagnostic Code Retrieval (using a jumper wire)

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Humvee / HMMWV - 4L80-E TCM Diagnostic Code Retrieval (using a jumper wire)

Рет қаралды 4,476

3 жыл бұрын

Quick video to show how to retrieval diagnostic codes from the TCM of the 4L80-E transmission that 4 speed Humvees use.
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Пікірлер: 11

@scottspencer3024 6 ай бұрын

Thanks for the helpful video. I'm going to use it to inspect a M1097A2 that I'm hoping to buy.

@Subgunman 3 жыл бұрын

Thanks for the info! Trying to learn as much as possible before investing in the ultimate truck!

@class3333 3 жыл бұрын

That was a very helpful and also straight to the point video - thanks for posting

@BMD11000 3 жыл бұрын

I appreciate that! It was my pleasure posting it.

@cruiez2008 3 жыл бұрын

Thanks for sharing

@BMD11000 3 жыл бұрын

My pleasure!

@mw2584 3 жыл бұрын

I've got an M1165 that won't go over 30mph. So followed all your steps exactly. My wait light doesn't flash. My trans light doesn't blink. Instead I get the regular routine of the wait light being solid for a couple seconds as if it's running the glow plugs, and the trans light never turns on/blinks at all. So I'm not sure how to troubleshoot from there with the jumper cable in slots A & E. I tried this by keeping that TCM box plugged in like you did, and also tried it with the main cable unplugged to that TCM box. I get the same results trying both. Any suggestions? It's in park, with parking break on, & tried various jump cables, no luck. I really don't understand why the glow plug wait light isn't flashing with that glow plug controller disconnected under the hood???

@BMD11000 3 жыл бұрын

I wish I knew more and could help but I really don't know what to suggest.

@oscarvazquez-od5gd 2 жыл бұрын

check if the trans circuit breaker is tripped (under/behind passenger seat near battery box) if not check the resistance on the circuit breaker. if thats good check the wires for ohms and voltage then go from there

@skmrinc4247 2 жыл бұрын

How do you clear the codes? Can you disconnect / reconnect TCM or simply disconnect batteries? Or do you need scan tool?

@BMD11000 2 жыл бұрын

Fortunately, I didn't have to get that far, so I'm unsure of the answer. I found some great information though on the GearReport site. Maybe the answer can be found there.