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engine relays clicking

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ricsrx

engine relays clicking
« on: January 17, 2008, 06:33:50 PM »
Hello, I have a 1991 sidekick with the EFI 1.6,    When i turn on the key the main relay, fuel pump relay and other emission relay's start clicking, motor turns over but will not start, checked plugs, no spark, I read in another post that this happens when there is a fault in the ECU, but it contained no further details on how to repair,
ricsrx
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Offline Skyhiranger

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Re: engine relays clicking
« Reply #1 on: January 17, 2008, 07:41:12 PM »
Most people swap out the ECM for another one.
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enigma

Re: engine relays clicking
« Reply #2 on: January 17, 2008, 07:58:39 PM »
yep just had mine rebuilt--exact same problem
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ricsrx

Re: engine relays clicking
« Reply #3 on: January 17, 2008, 08:23:05 PM »
What was the cost of a rebuild?
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Offline ack

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Re: engine relays clicking
« Reply #4 on: January 18, 2008, 12:31:52 PM »
Quote from: ricsrx on January 17, 2008, 08:23:05 PM
What was the cost of a rebuild?


 go to http://bbs.zuwharrie.com and pm Surly (do a search for ECM to find a post of his) with your problem.  Indicate the year and model.

He has been known to rebuild ECMs for a reasonable price.
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Ack

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ricsrx

Re: engine relays clicking
« Reply #5 on: January 19, 2008, 12:19:42 PM »
installed a new compputer today, its doing the same thing,  any one have any other ideas :(
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Offline Rhinoman

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Re: engine relays clicking
« Reply #6 on: January 19, 2008, 12:53:30 PM »
You may have a short somewhere. Try disconnecting the sensors one by one to try and isolate the fault.
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2000 Vitara 1.6, 3+3 Lift, 33"MTs, 5:83s, LWB brakes, Winch, Snorkel, Safari Rack
1986 SJ413K PickUp, 1.6L conversion.

OBD1 - Full diagnostics on a PC/Laptop: http://www.rhinopower.org
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ricsrx

Re: engine relays clicking
« Reply #7 on: January 19, 2008, 02:40:34 PM »
thats what i am doing now, if i had a good print it would help, icant seam to find all sensors , i am unpluging them ine at a time, but only when i unplug the computer does the chattering stop. I am chasing that blue black wire all over
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Offline Skyhiranger

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Re: engine relays clicking
« Reply #8 on: January 19, 2008, 03:07:27 PM »
Do the relays continually click when you are trying to start it?  Or do they just click once when you turn the key on, then if you wait about 3 seconds (without trying to start it), they will click once more?

Could be a bad ground, could be a bad relay (or two).
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ricsrx

Re: engine relays clicking
« Reply #9 on: January 19, 2008, 03:18:58 PM »
as soon as you turn on the key they start,, its probably a short , they take turns chattering after checking different items and trying the key , it looks ugly , im tyring to locate a print online, i also found an ald unused car alarm under the dash, what a scabed job.
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Offline Rhinoman

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Re: engine relays clicking
« Reply #10 on: January 19, 2008, 04:30:53 PM »
ECU wiring diagram is here:

http://www.btinternet.com/~j_holland/docs/installation.jpg
http://www.btinternet.com/~j_holland/docs/key.jpg

The Black/Blue wire is the 12V feed to the solenoids and stuff. Are you sure that the replacement ECU is good?
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2000 Vitara 1.6, 3+3 Lift, 33"MTs, 5:83s, LWB brakes, Winch, Snorkel, Safari Rack
1986 SJ413K PickUp, 1.6L conversion.

OBD1 - Full diagnostics on a PC/Laptop: http://www.rhinopower.org
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ricsrx

Re: engine relays clicking
« Reply #11 on: January 20, 2008, 02:46:11 PM »
i cant see two ECU's doing the same thing,

now after pulling wires i have lost power up to the key switch, what a mess
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blackandtan

Re: engine relays clicking
« Reply #12 on: January 20, 2008, 03:22:19 PM »
Quote from: ricsrx on January 20, 2008, 02:46:11 PM
i cant see two ECU's doing the same thing,

now after pulling wires i have lost power up to the key switch, what a mess

My first guess would be a bad ground, that is the usual sympton
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Offline Skyhiranger

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Re: engine relays clicking
« Reply #13 on: January 20, 2008, 06:45:35 PM »
Quote from: ricsrx on January 19, 2008, 03:18:58 PM
as soon as you turn on the key they start,, its probably a short , they take turns chattering after checking different items and trying the key , it looks ugly , im tyring to locate a print online, i also found an ald unused car alarm under the dash, what a scabed job.

Sounds like either bad relays or a bad ground. 
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Offline Rhinoman

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Re: engine relays clicking
« Reply #14 on: January 21, 2008, 04:48:15 AM »
Quote from: ricsrx on January 20, 2008, 02:46:11 PM
i cant see two ECU's doing the same thing,


I can, the symptoms that you have indicate that there is a problem with the 12V injector power circuit or the switched 12V supply (black/blue). This may be a problem internal to the ECU, usually caused by bad capacitors. The relay chatter is caused the by the ECU continuously resetting itself. It does this when it detects a major fault. It could still be a short or a bad contact in the connector but its usually the ECU.
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2000 Vitara 1.6, 3+3 Lift, 33"MTs, 5:83s, LWB brakes, Winch, Snorkel, Safari Rack
1986 SJ413K PickUp, 1.6L conversion.

OBD1 - Full diagnostics on a PC/Laptop: http://www.rhinopower.org
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