1G F4A22 stuck in limp mode

[Ejsmith50]

Hello, I have a 1991 Laser LS stuck in limp mode. Have codes 45, 47 & 85. No ECU codes. Have a bunch of hours researching this. TCU is fairly new. Trans works fine on home made simulator switch. Has correct volts on each pin on inhibitor plug and ohm'ed inhibitor switch, also fairly new.

Haven’t purchased transmission service manual, yet. May be next move

 

[GDNF2ET]

Hello, I have a 1991 Laser LS stuck in limp mode. Have codes 45,47 & 85. No ecu codes. Have a bunch of hours researching this. Tcu is fairly new. Trans works fine on home made simulator switch. Has correct volts on each pin on inhibitor plug and ohmed inhibitor switch, also fairly new. Haven’t purchased transmission service manual, yet. May be next move

Scroll down for codes http://w4a33.com/doku.php?id=tcu

 

[Ejsmith50]

Scroll down for codes http://w4a33.com/doku.php?id=tcu

Thanks for the info & link. Had the four wire plugs switched, because the one for solenoids was too short to clip on holding bracket, so I didn’t think it went there. After checking voltage on both 4 pin connectors, I found that the pulse generator pins had 2 volts. Then it made since. Now kills engine when put in gear. Glad to have a different problem to chase. thanks