Code AD-1 - Technical Troubleshooting discussion in Forkliftaction's forums

Toyota 8FGCU18:
Code AD-1

I am working on an 8 series with an AD-1 code. Another tech was trying to wire in a 12V accessory plug and attempted to wire into the fuse box in an empty relay socket. The relay is labeled NTRL ST and is next to the LPG main relay but I can't find it in the schematics. I am assuming the 12V switched coil power comes from the ECM and has caused this code. The wiring has been removed and I have checked all of the A20, A21, and A36 connections. Any ideas?

Posted 4 Dec 2018 06:27
Discussion started by Gearhead
Ohio, United States

Post a Reply Report this post

Showing items 1 - 2 of 2 results.

Sort messages by:

Hi godd day to you
I have same issue about the AD-1 wont work the engine start up the LPG solenoid not open i try to looge the hose from Solenoid supply and dosent come out the lpg reason engine crank only no supply no also in Distributed caps
Can you help me to solve it any idea so that i can continue

Posted 10 Jun 2023 18:22
Reply by jonathan_l
Jeddah, Saudi Arabia

Im a hero

Post a Reply Report this post

AD-1 is Canbus communication engine data reception error. I may have useful troubleshooting info, contact my profile.

Posted 4 Dec 2018 14:08
Reply by tom_p
Alberta, Canada

Post a Reply Report this post

Post your Reply

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Having trouble using the Discussion Forums? Contact us for help.