Quote:
Originally Posted by ILUVMILS
This is a quote from your original post.
"He has diagnosed the problem as a defective gear shifter module. $882 to replace new and $640 to replace with a used part...."
Correct me if I'm wrong, but didn't we find that the shifter in your ML is the early version, which uses the gear recognition switch, and not the later ESM type?
Also, I believe your problem began after the conductor plate was replaced, right? If so, the new conductor plate may be the problem.
Assuming that all the diagnosis/work performed up to this point has been done properly, the next thing to do is check the four signal wires from the gear selector switch to the transmission ECU. Depending on the position of the shifter, the voltage at each of these wires will be either >11 or <1. These inputs let the trans ECU know what gear is selected. If one of these values is implausible the transmission goes into "limp" mode.
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Correct. The shifter is the early model with the GRS, not the ESM.
I don't think it's the conductor plate issue because... The conductor plate had been having issues for a while. As I was getting ready to take the car in for repair for that, the reverse lights would not go on. The fuse was ok, the bulbs were ok and it was determined that the gear recognition switch was the problem. The mechanic I was referred to botched the job pretty badly and I had a second mechanic complete the repair but I'm not sure how well he did it. So, I'm guessing that the problem that happened after the conductor assembly was replaced could have been lingering as a result of the botched replacement of the gear recognition switch in the original shifter. The shop owner replaced the shifter with a used shifter.
As to why it's happening with the replacement shifter, the only thing I can think of based on what I've been told here is that the new/used shifter I got may be faulty?