Cross-connection Archives - Transmission Digest
A Self-Inflicted Injury

There have been enough different cross-connection scenarios that ATSG could easily do a full-day seminar on the subject. The worst of all involved an R4A-EL transmission in a Mazda 929 on which the input-speed sensor was cross-connected with the heated O2 sensor. Soon after the vehicle was started, voltage from the ECM that was supposed to be going to the heated O2 sensor was being routed to the TCM because of the cross-connection error.

Another Cross-Connect Scenario

1998 to 2000 Kia Sportage and Sephia have the idle-air-control valve and the throttle-position sensor relatively close to each other. Figures 1 and 2 show the setup in the Sephia, which is similar to that in the Sportage.