My van cranks over but won't start. Checked for spark none. Checked 4 wires to coil for power and won't light a test light on any, key on or turning over.

Doing the key bump I get p1388 code. Checked and replaced asd relay with a working one from fuse panel. Checked under fuse panel. Found a corroded wire and replaced the bad spot. Checked still no spark. Had a look at all other wires and not seeing any other bad ones.

Checked connections to computer beside the battery and no corrosion in or around plug-ins. Wires to the computer all look clean and good. On the left frame rail there's a computer, transmission computer? Does this one have anything to do with spark or the asd relay code I get?

Any suggestions or advice please!

 

The ASD can be difficult to diagnose. It powers MANY things, If you don't have access to a meter and diagrams, it's gonna be tough to find it unless you get lucky. Since you mentioned 4 coil wires I will assume it's a V-6.

Possible Causes.


ASD RELAY CONTROL CIRCUIT SHORT TO GROUND
PCM

 

test for power at the asd? try jumping the asd terminals and see if power shows to the coil?

 

Haven't tried jumping it, How do I go about trying that?

 

oh and yes it's a 6 cyl 3.3l 220000 kms forgot to mention.

 

paper clip is how I'd jumper the relay

 

tried jumping the asd, no fire to coil. The bottom of the fuse center had a really corroded plug, there was power to this plug though. I cleaned it up and still the same no fire. There also was a corroded wire that I replaced. Checked for volts @ the relay and there doesn't seem to be any. This should have some voltage in the 4/5 clips where the asd relay plugs in?

 

have you checked continuity between the ASD and the coil?

 

The third wire on the coil (brown/white) to the connector (30) where the asd relay plugs in has continuity (turns from 1 to 0) sorry new to this but a quick learner.

 

Put power to the brown and white wire on the coil and the van starts, runs rough but starts, what are your thoughts now? I'm still lost :/