LY6/TH400 E38 brake and/or clutch switch?
Thread Starter
Joined: Apr 2010
Posts: 2,816
Likes: 86
From: Instagram @chevyhotrodder
LY6/TH400 E38 brake and/or clutch switch? I am working on wiring my LY6 E38 ECM. The engine is backed by a TH400, with plans to eventually swap in a T56. Do I need to wire anything to the terminals below?
X1 terminal 9 brake switch signal
X1 terminal 26 clutch pedal position sensor signal
X1 terminal 42 Low Reference (M10) - Clutch Pedal Position Sensor Pin C
X1 terminal 54 5-Volt Reference 2 (M10) - Clutch Pedal Position Sensor Pin A
X1 terminal 9 brake switch signal
X1 terminal 26 clutch pedal position sensor signal
X1 terminal 42 Low Reference (M10) - Clutch Pedal Position Sensor Pin C
X1 terminal 54 5-Volt Reference 2 (M10) - Clutch Pedal Position Sensor Pin A
Thread Starter
Joined: Apr 2010
Posts: 2,816
Likes: 86
From: Instagram @chevyhotrodder
I don't know how the ECM uses these signals. I have read the brake switch is for torque converter lockup which is not needed for a TH400 or T56, but I'm not sure if the ECM uses it for other purposes.
I am not using a BCM so cruise control functionality will not be there.
I can add the wires, but I don't want to go through the trouble of swapping out my brake switch for a 2-pole or adding a relay if the signal wont even be used.
I am not using a BCM so cruise control functionality will not be there.
I can add the wires, but I don't want to go through the trouble of swapping out my brake switch for a 2-pole or adding a relay if the signal wont even be used.
I would not think you need anything other than a PNP switch feed to idle up. Without a electronic Trans, it is would be pretty much like a Manual trans tune.
Wouldn't hurt to use the Brake switch input.
Wouldn't hurt to use the Brake switch input.
I used none of those inputs on my L99/E38/T56 swap. As mentioned, they are for BCM/TQconv/Cruise and not needed for a manual trans or non-electric auto. If you stick with the MAF and have the values for it and your injectors, the E38 will keep the idle fine, even on a manual trans.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo Thread Starter
Joined: Apr 2010
Posts: 2,816
Likes: 86
From: Instagram @chevyhotrodder
Thanks for the reply! How is your LY6/TH350 combo working? Any issues with stop & go, idle surging, etc? Do you have VVT running? is the engine combo mostly stock or modified?
