Voltage Signal: Description and Operation

PURPOSE
Inform the control module that there is a basic generator over voltage problem.

OPERATION

PCM/ECM
If voltage is greater than 19.5 volts for 2 seconds at PCM terminal "E16" (ECM is "C16"), the control module sets Diagnostic Trouble Code 53, the automatic transmission pressure control solenoid is turned "OFF", the automatic transmission shifts immediately to third gear, and TCC operation is inhibited. (the setting of additional DTC's may result.)

TCM
If voltage is greater than 19.5 volts for 2 seconds at TCM terminal "A12", the control module sets Diagnostic Trouble Code 53, the automatic transmission pressure control solenoid is turned "OFF", the automatic transmission shifts immediately to third gear, and TCC operation is inhibited. (the setting of additional DTC's may result.)