DTC 26 will set if:
The system is running in "CLOSED LOOP."
Brake switch is closed (brake not applied).
Transaxle in mid or high gear.
The ECM detects an improper voltage level on a QDM "A" controlled circuit for 10 seconds.
The ECM does not know which controlled circuit caused DTC 26, so each and every QDM circuit has to be tested to see which one caused the code to set.
Friday, December 3rd, 2010 AT 10:23 PM