Transmission Controls With PCM

ECM COMMUNICATIONS FAILED

DTC PARAMETERS
DTC 34 is set when information from the PCM/EC is not being received by the PCM/TC.

Some Saturn Portable Diagnostic (Scan) (PDT) Tool or Saturn Service Stall System (SSS) tests such as a QDM test, PCM reprogramming, or adaptive reset may cause DTC 34 to set.

TEST DESCRIPTION

NOTE: Record all PCM diagnosis diagnostic trouble codes/information flags and include with repair order.

^ Clear all diagnostic trouble codes/information flags, test drive the vehicle and if DTC 34 resets, replace the PCM.