CHECK ENGINE request
| CHECK ENGINE request |
If an emission-related fault arises in the automatic transmission, the transmission control module sends a PWM signal at a frequency of 2 Hz from pin 5 to engine control module pin • 61 (Saab Trionic) • 65 (Motronic 4.1) • 39 (Motronic 5.2) The engine control module then causes the CHECK ENGINE lamp (MIL) to light up.
When the ignition key is turned to the ON position, the control module sends a ground pulse for 1 second as a functional check.
This project is supported by memberships and donations. If you use this site, please consider Joining SCNA and/or making a donation.
Our Friends
