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Won't start - suspect Fuel Relay or Pump. Help needed.
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Posted by ben9kspg (more from ben9kspg) on Sat, 7 Nov 2009 15:06:05 Share Post by Email
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Cranks strong, and based on Ari's checklist (http://www.saabnet.com/tsn/bb/9000/index.html?bID=215551) I've determined that at least the following are good:

Fuses
Control Module (Check engine Light)
Main Relay (6 second voltage to DI)
DI (I carry a good spare in trunk)
Crankshaft position sentor

I haven't tested the Anti-theft, Pump Relay or Pump. I can't seem the hear the pump going, but I always have music playing so honestly, I may not be able to discern.

Here are parts of Ari's list that I'm having trouble with (hence the request for help)


Jumper fuse 14 to fuse 22.
Does the fuel pump run?
No – check the wiring at the fuel pump, but chances are the fuel pump is bad.
YES – fuel pump is OK – Go to Test 2.

--> Do I just short the top of both fuses?

Test 2 -Fuel Pump relay Part 1
Ignition OFF
Connect a voltmeter between ground and fuse 14.
Remove fuse 23 for 5 seconds, then re-insert.
Ignition ON –The voltage should jump up for a couple of seconds, then drop back down.
What voltage did you see?
0 volts – Fuel pump relay may be dead. Go to Test 3
12 volts – There’s a problem with the fuel pump
Less than 10 volts, but more than 0 – dirty fuel pump relay contacts.

Test 3 – Fuel Pump relay/Anti-Theft
Note – this is for US anti-theft systems.
Ignition OFF
Remove the fuel pump relay. Connect a voltmeter from pin 86 to ground.

--> Where is this relay located, and which is pin 86?

Ignition ON.
What voltage did you see?
12 volts – Anti-theft is OK, relay is bad
0 volts – Anti-theft module is keeping the fuel pump off.
Go to Anti-theft box on the right hand side of the passenger compartment, by the knee bolster. Make sure the contacts are OK. Jumper pins 9 to 21.

--> What is the pin layout?

Thanks in advance,
Ben




posted by 67.180.3...

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