Originally Posted by cspoonts
Yeah the mechanic is telling me all the components on that circuit are not listed you have to look in an expanded database to find them. Can you tell me what pins WD 10-13 feed off the PCM? I will try and get by and get the sheet he has that lists all the components on that circuit.
I will also check that fuse. Would be awesome if thats all it was
Admittedly we don't know everything.. however I have access to GM'* online FSM'* and the actual paper books. None are mentioning something in that area, neither is my post from back when that you linked. Fully ready to help you out though. Let'* look at it from 15 different ways and see if we can't solve it. What is pins WD 10-13? The PCM has three connectors, each with pins 1-16. EDIT: WD I think stands for White connector, column D
On connector 2 aka the one I think is white, pins D10-D13 are the trans.
D10 Dk Blue circuit 473
D11 Dk Grn Circuit 335
D12 Dk Grn/Wht Circuit 459
D13 Brn/Wht Circuit 419
Going back to the P1670 page It shows D10 as High speed cooling relay
D11 Low speed cooling relay
D12 AC Relay
D13 Malfuction indicator light aka SES Ign fuse 1 15 amp.
Further..you mentioned the AC working. Page 3 of the code states that if the AC is on all the time or off all the time that it'* likely that relay. Here'* the scrub.. they want a Tech 1 tool to do stuff and we don't have one.
Here'* a test.. Unplug the three relays for P1670 and see if the trans still acts up. Be careful though because w/o the fan relays your fans won't come on at all and you'll be cooled only by airflow. Fan'* don't normally come on until 216F low speed and 228F for high speed. So you should be ok for a test drive.
The FSM also mentions that you could have a bad relay or something else grounding the circuit. Doesn't really say what though. So you'll kinda be testing things and I think from your ac mention that it'* the ac or it'* relay. If that doesn't work the FSM does suggest a new pcm.