P1787 & P1698
I haven't been able to find much on this problem. Got a 2002 mini with CVT. The car runs smoothly but acts as if its stuck in the equivalent of 2nd or 3rd gear. Also an X is displayed to the left of the gear selection display on the speedo, Like xP or xD, whatever gear is selected. A friend with access to a good diagnostic computer pulled codes P1787-bi-polar stepper motor open circuit, and P1698 - ECU malfunction.
Online I have found references to a transmission control unit also called a GIU, but the descriptions of where it's located have been inaccurate or unclear. Does anybody know where it's located?
I have found what I think is the ECU in a slot on the left side of the battery box, which is where one desription said that the GIU was located. Other pictures show the GIU mounted on a bracket, but no location is given.
i'm just guessing, but the stepper motor is probably inside the CVT, and does the "shifting". What I need to know is how to determine if the problem is in the actual stepper motor, of if it' s an ECU or GIU problem.
Last edited by ratfink77; Aug 4th, 2008 at 11:11 AM.
Reason: more details