Ecm Pin Out Wiring Diagram??? (1 Viewer)

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Dec 7, 2005
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I have searched old threads and have been unable to locate an ECM Pin out wiring diagram for an 88 ECM. The wiring schematics I have only show the top view of the ECM, I need the actual or looking down on the pins view.

Anyone have anything???

- T:cheers:
 

Moby

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Maybe I'm not understanding the view you want but the FSM has each pin labeled in the EFI section. Is this not what you're looking for?
 
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Do you have a FSM? I think each pin is labeled in it like Moby said.

Whats your problem? I repaired my ECM (emissions control board) and replace some components. I don't know how different the 88 one is but I bet it is different from the 60's
 
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I don't have a FSM, but the wiring diagram in the Haynes Manual is somewhat adequate.

Because some of the wiring harness colors repeat themselves, I was hoping to find Pin description of the 3 connectors on the ECM. I think I figured out what I needed, but since I still have not solved my code 41 (open or short in the TPS circut) I am curious as to what wiring diagrams others have come across.

I have disconnected both ends of the TPS and Air Flow Meter harness, then measured pin-to-pin and pin-to-ground continuity to try and find a short. Since only 1 wire goes to ground (#7 out of the Air Flow meter) I do not think there is anything wrong with the wires. I'm thinking that the problem may be in my ECU.

Anyone else had similar problems?
 
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Did you measure the pin on the ECM to ground with the cable disconnected?

The # 7 wire you are measuring. Does it go to the ECM? It might be permanently shorter to ground through a problem in the ECM.

Also could unplug the cable going to the air flow meter and turn on the cruiser and see what voltage you measure there. I don't know if doing this would hurt anything. You could leave the cables connected and stick the leads in and measure the voltage that way.

I would look at some of my manuals and see if I have a schematic.
 
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Kevin,

according to the manual I have, #7 is grounded in the engine compartment..

I am checkin my voltages tonight, but as of the latest trouble shooting, the ECM could be bad.

Thanks,

Tim
 

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