Grand AM L4-138 2.3L VIN A FI HP (1989)
CHART C-8D
TRANSMISSION GEAR SWITCHES CIRCUIT CHECK 2.3L (VIN D) "N" SERIES (PORT)
Circuit Description:
CHART C-8D is used to check the 2nd and 3rd gear switch inputs to the ECM. Transmission gear input signals to the ECM are determined as follows:
1st gear
=
2nd gear switch closed
(also P/N & R) 3rd gear switch open
2nd gear
=
2nd gear switch open
3rd gear switch open
3rd gear
=
2nd gear switch open
3rd gear switch closed
