S15/T15 4WD P/U V6-262 4.3L VIN W CPI (1992)
Overvoltage Protection Relay: 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.)
VCM
If voltage is greater than 17.1 volts at VCM terminal "GR2" sets Diagnostic Fault Code P1632. For 2 seconds after the fault is detected, the VCM
will disengage its outputs. This may result in additional DTC's being set.
