Low sides are typically used to control things like VVT, Idle and Boost solenoids that require higher current and PWM drive. They can also be used as Relay drives if you wish, but Relay Drives cannot be used for PWM frequencies.

ME442 Wire-In PWM Low Side Outputs


Note that LS 1 to LS 8 are 1.2A current limited LOW side PWM outputs while LS 9 and LS 10 are 6A current limited flyback-protected PWM outputs.


GEN1 ME100/ME221 Wire-In PWM Low Side Outputs


All LS1-LS7 (GEN1 ME100) and INJ1-4 and LS1-3 (on GEN1 ME221) are 6A, PWM capable Low Side channels. They do not have fly-back diodes installed, so will need them if driving PWM or Inductive loads.


ME221/ME442 Plug-In 


Please refer to the Hardware Install guide for your model for details on spare outputs.