Turbo Dodge Forums banner

1 - 2 of 2 Posts

41 Posts
Discussion Starter #1
I just put this engine back together and into my 87 Shelby Lancer. My SnapOn diagnostic computer claims it has a Code 42 ASD Relay Not Working. Which makes sense since it won't start and has no fuel pressure.

My question is now what? As I recall the ASD relay is part of the Power Module in 1987 and is not replaceable?

Best Regards

24,118 Posts
Yes, in 87 the ASD Relay is internal to the PM and is actuated by the LM.

If you are receiving a Code 42 it is probably due to a lost controller power feed or ground.

Since you had the engine out the first thing to check would be the main controller ground from the firewall to fuel rail/manifold.
Is it connected, connected on a clean surface and tightened properly?

If yes you will need to use a digital multi-meter to check all controller power feeds and grounds.

PM 10 Pin Connector
Cavity #2 Power In From Ignition Switch
Cavity #3 Power Out to LM Red Connector Cavity's 7 and 8
Cavity #4 Power In From Battery through a Fusible Link
Cavities 9 and 10 - Ground

PM 12 Pin Connector
Cavity #6 Power Out to LM

LM Red Connector
Cavities #7 and 8 Power In From PM 10 Pin Cavity #3.
Cavity #24 Ground

LM Blue Connector
Cavity #2 Power In From PM 12 Pin Cavity #6
Cavities #7 and 8 Ground
Cavity #22 Power In From PM 12 Pin Cavity #6

ELECTRICAL- Main Controller Ground 84-89.jpg

Engine Compartment Front-2011.jpg

85-87 PM 10 Pin.jpg

85-87 PM 12 Pin.jpg

85-87 LM Turbo Red.jpg

85-87 LM Turbo Blue.jpg
1 - 2 of 2 Posts