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2002 Infiniti G20 crank no start
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Pokie1313
New User
Jul 26, 2014, 11:32 AM
Post #1 of 5
(11050 views)
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2002 Infiniti G20 crank no start
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2002 Infiniti G20
2.0 L base (not turbo)
165k miles
My daughter's car
Engine is cranking but will not start. There was no spark upon testing with in line tester connected to plug wire, old school from screwdriver wedged into plug wire or plug +wire connected and held to ground.
No codes.
No fuses are blown.
Battery voltage present at coil (terminal 8) with ignition on and also while cranking.
Ground continuity at dizzy terminals 1 and 5. I do get some resistance and 0.1V on terminal 5 while cranking.
Have 0.4V at dizzy terminal 6 while cranking.
Did the obligatory coil resistance tests and of course primary and secondary ohms within spec.
So, I replaced the distributor with new OEM from dealer. Distributor on this integrates coil, power transistor and cam sensor into one expensive black box.
Still, no spark.
Went back over all the tests from the FSM. Tried old distributor cap and rotor. Main relay tests good. Rotor bug spins while engine cranking. Pulled terminals from distributor connectors, all look good.
Head banging, why no spark?
CEL comes on and stays on with ignition on.
Could it be the immobilizer? The security light comes on after about 5 seconds and stays on solid with ignition on. Also, with all doors, hood, trunk closed, key out, NO LIGHT. Tried a different key, no change.
Question 1. Does immobilizer on these models prevent spark? If so, how does it do that while still making it look like ignition has everything it needs to work (power, ground).
Question 2. What did I miss in the diagnosis? This thing is kicking my ass and I don't want to tow to a shop for them to find something simple stupid I overlooked.
Question 3. It' s 2014, do I still have to have nissan proprietary data connector and software to diagnose and update the immobilizer on a 2002 model?
Thank you in advance for any assistance you can provide.
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Discretesignals
Ultimate Carjunky
/ Moderator
Jul 26, 2014, 12:07 PM
Post #2 of 5
(11034 views)
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Re: 2002 Infiniti G20 crank no start
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Immobilizer system doesn't disable spark.
Are there any codes stored in the PCM? If so, what are the numbers? Do you have injector pulse?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jul 26, 2014, 12:09 PM)
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Pokie1313
New User
Jul 26, 2014, 1:41 PM
Post #3 of 5
(11022 views)
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Re: 2002 Infiniti G20 crank no start
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I was going to check codes again just now but I broke my obd2 to laptop cable. I'm having a bad day! No codes were stored before or after the distributor was replaced. Well I did have a cam sensor code after distributor replaced, but I'm pretty sure that was due to trying to start it with the distributor connector accidentally disconnected.
I am getting 12 V to injector with ignition on. Unable to crank test now due to valve cover is off (checked to see if engine out of time) and the replacement gasket won't be in till tomorrow.
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Pokie1313
New User
Aug 5, 2014, 6:33 PM
Post #4 of 5
(10956 views)
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Re: 2002 Infiniti G20 crank no start
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Okay, I pulled codes and got p1610 and 1612, which are codes for the immobilizer.
I had the car towed to the dealer and they replaced the NATS antenna amp, reprogrammed keys and now the problem is resolved.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 5, 2014, 11:34 PM
Post #5 of 5
(10951 views)
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Re: 2002 Infiniti G20 crank no start
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Dealer found and fixed/resolved. I'll close thread as 'resolved.' and can be reopened upon request my any moderator,
T
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