-TheBandit-

iTrader: (1)

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

i r teh noobz

iTrader: (4)

I was advised to supply the PCM with a brake signal for my TKO LM7 setup.

I'd imagine the clutch switch is for cruise control.

71403

Match the inputs up with the calibration you intend to use.

If unknown I would add the wires now - easier to have extras in the harness than add them later.

-TheBandit-

iTrader: (1)

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.

bczee

iTrader: (12)

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.

85MikeTPI

iTrader: (9)

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.

-TheBandit-

iTrader: (1)

Thanks for the reply Mike! I tend to trust what you've done since you've had good results and my setup is so similar.

ijimmy

none of those are hooked up on mine , ly6 on a turbo 350 , and ly6 on a 2004r [non lockup]

-TheBandit-

iTrader: (1)

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?