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Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Transmissions
Satisfied Customers: 48644
Experience:  16 yrs. experience with auto, manual, & CVT drivelines
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What needs to be replaced if i get "manufacturer control

Customer Question

What needs to be replaced if i get "manufacturer control transmission code on a 2000 lexus gs300 automatic trans.
JA: Do you have a scan tool to read the codes?
Customer: Yes i already did.
JA: Sorry about that. I must have missed it. Could you tell me again?
Customer: U need the exact code?
JA: Are you fixing your GS300 yourself? What have you tried so far?
Customer: Yes myself. I have tried a few things.
JA: Anything else you want the mechanic to know before I connect you?
Customer: No.
Submitted: 10 months ago.
Category: Transmissions
Expert:  Chris (aka- Moose) replied 10 months ago.

Welcome, I'm Chris (aka Moose), my normal schedule online is around lunch and after dinner till early morning.

Do you know the code number that is stored?

Customer: replied 10 months ago.
I can scan itagain i dont remember exactly what the code is
Expert:  Chris (aka- Moose) replied 10 months ago.

Thanks, ***** ***** you know.

Customer: replied 10 months ago.
One second im scanning it now
Customer: replied 10 months ago.
P1780 is the code
Customer: replied 10 months ago.
R u still there?
Customer: replied 10 months ago.
Guess not:(
Expert:  Chris (aka- Moose) replied 10 months ago.


Here is what 1780 means

It is a functional or electrical issues with the PNP switch. The park neutral position switch tells the vehicles main computer what gear you have selected so the computer can correctly control the transmission.

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Thanks for using Just Answer, Chris

Customer: replied 10 months ago.
how do I fix it my trans is shift extremely hard for the first 3 gears
Customer: replied 10 months ago.
Do i replace the pnp swtch, the shift solenoid the shift sensors?
Expert:  Chris (aka- Moose) replied 10 months ago.

You will need to perform the diagnostic steps I senst to see if the PNP switch wiring is to blame or if the PNP switch is to blame.

Customer: replied 10 months ago.
How do I do that?
Expert:  Chris (aka- Moose) replied 10 months ago.

Can you open the link I sent?

Can you do those tests?

Customer: replied 10 months ago.
Im a quick learner. I just did the water pump and timing on my car in 5 hours myself just using a app that provides step by step instructions. I did it right cuz the car sound much better and feels better idling.
Customer: replied 10 months ago.
Email? Cuz there is no link on here.
Customer: replied 10 months ago.
I cant open it. I dont know why.
Expert:  Chris (aka- Moose) replied 10 months ago.

Are you on a home PC?

Customer: replied 10 months ago.
I got it open. No my cell. Where is that plug located? What do I set the multi meter at to test it.
Expert:  Chris (aka- Moose) replied 10 months ago.

In step 2 it states your checking voltage so DC voltage is what the meter is set to. The sensor is where the shift linkage connects to the transmission.

Customer: replied 10 months ago.
Ok can I go attempt it and get back to you once I figure it out and record the information I get?
Expert:  Chris (aka- Moose) replied 10 months ago.

Sure we can work through the results you get from the diag steps if your not able to follow those steps based on the results you get.

Customer: replied 10 months ago.
I couldnt figure out how to do the diagnostics test you sent to me
Expert:  Chris (aka- Moose) replied 10 months ago.

Since your not able to do the test it may be best to just replace the sensor to rule that out.

Expert:  Chris (aka- Moose) replied 10 months ago.

Hello again Chris here,

  1. I have to assume you were not pleased with my help, because you have not replied or rated the post.
  2. What would you like to do regarding your question now?
  3. Do you still need help? Please reply I want you to get equal to or more than what you paid for.
  4. This post is coming up on the 7 day mark where it times out. That can prevent me from being able to post answers to your replies.

Thanks Chris