 | Home > Puma (Tdci) > Puma 2.4 not starting ..... immobiliser??? |
 
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554  |
P1602 Immobilizer/ECM Communication Error
U0100-87 - Lost communication with Engine Control Module/Power train control module A" |
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1st Feb 2017 3:36pm |
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| ziduz Member Since: 20 Sep 2014 Location: Hong Kong Posts: 8 
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Hi 4wd-junky,
I had the same problem, and I think I have temporarily found the fix. I wonder when your vehicle refuse to start, what does the cluster act like? Does the Temperate gauge go way up to the top or the cluster is kinda dim with the ABS light on? That 2 symptoms happened to me before. My 10AS and the cluster are in good-clean condition when we were performing a check. At the end, We found out that the some of the ground wires at the main harness was loosen (behind the clock, behind center of the dash, behind the main air ducting pipes), we soldered those wires, and the problem has not come back (yet). |
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20th Feb 2017 12:45am |
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| ziduz Member Since: 20 Sep 2014 Location: Hong Kong Posts: 8
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The attached is one of those connector.
Btw, in case if you concern I drive a 2011 Defender 110 2.4  Click image to enlarge |
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20th Feb 2017 12:53am |
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| 4wd-junky Member Since: 31 Aug 2014 Location: UK Posts: 89 
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Hi Zidus
My cluster (IPAC) instruments and lights all worked as normal, ie. temp gauge was normal and ECM light always stayed off. In my case the non starting was caused by 10AS signal only intermittently reaching the ECM as a result of a faulty IPAC. |
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20th Feb 2017 10:47am |
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| craig1990 Member Since: 22 Mar 2018 Location: northern ireland Posts: 1
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hi im new to this. I have a landrover defender doing the exact same thing as what has been talked about on this post. my defender 2007 2.4 deiesel. it seems to be quite basic as there are no key fobs. only turns for a split second and then cuts out. I have done a few checks and its dropping power to the starter and after reading through this post I think it to do with the 10as not communicating to the ecm.
my question is how to I diagnose if it is the 10as or ecm or the ipac. thanks in advance |
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23rd Mar 2018 8:43am |
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| leisure7 Member Since: 30 Mar 2018 Location: Halifax Posts: 2
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Hello there, I am having the same problem with my Land Rover 90, turning over and then cutting out and not starting. Getting code P1602 Noticed you mentioning a Shunt and a fault with the IPAC. I would appreciate some help on sorting the problem as I am stuck at the moment. Thank you |
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30th Mar 2018 1:05pm |
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| leisure7 Member Since: 30 Mar 2018 Location: Halifax Posts: 2
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Just so everyone knows and if it is helpful in the future I have sorted the issue I believe.
It was a bad connection between the two bottom wires (the brown & white wire with the black terminal and the red and white wire with the red terminal) on the ignition switch. I tested the ignition switch and that was working fine. So sanded down the terminals and made the connectors tighter and used some contact cleaner to ensure a good connection. I did this for all the terminals on the ignition switch. Then another fault was found which was the connection with the clocks (instrument cluster) was not very good so sorted this issue and it is now running fine. Hope this helps someone out.  |
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31st Mar 2018 8:12am |
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| johnnyd Member Since: 13 Apr 2013 Location: Chippenham Posts: 1006 
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Hello
I think I might be suffering this same thing, just replaced the battery which i am non to happy about, although the other was 11 years old, and still it turns over 4 times then cuts out, go to start it again, and the engine does not even turnover........occasionally it starts...... Can anyone direct me to how to do this shunt bypass please, its a 2.4 2008 Puma......... This only seems to happen in the heat bizzarly..... Thanks JD 2008 TDCi 2.4 XS CSW |
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28th Jun 2018 1:35pm |
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| johnnyd Member Since: 13 Apr 2013 Location: Chippenham Posts: 1006
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If anyone could pm me any details about how to do this bypass I would appreciate it...
Thanks JD 2008 TDCi 2.4 XS CSW |
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29th Jun 2018 2:49pm |
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| johnnyd Member Since: 13 Apr 2013 Location: Chippenham Posts: 1006
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Update on this, it seems if the external temperature is above 28 or so, i have trouble starting it, below that is seems to start fine. Are we looking at circuit boards with a hairline crack here expanding in the heat? Is it likely to be the immobiliser? It turnsover 4 times then nothing when the fault is there, its a new battery so enough volts. I still dont know how to isolate the immobiliser to rule it out.
JD 2008 TDCi 2.4 XS CSW |
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15th Jul 2018 11:18am |
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| Crosslanes Member Since: 02 Oct 2019 Location: Stafford upon avon Posts: 10 
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Hi I have a 2.2 2013 puma , same problem you are talking about on this post, I’ve checked the fob and it’s sending rf out fine, diagnostics won’t communicate with immobiliser at all, red light stays on dash solid, it cranks for a couple of secs then nothing until you cycle ignition and same again, connections to 10as look clean and all looks dry, I can’t get the eka out the ecu due to no communication with 10as, is there a bypass you could help me with? Thanks in advance Paul |
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2nd Oct 2019 6:29pm |
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| johnnyd Member Since: 13 Apr 2013 Location: Chippenham Posts: 1006
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Hi Crosslanes, see this post also, mine turned out to be an incorrectly installed replacement ignition switch also OEM so not a good replacement part.......since Martin replaced it, no issues at all........
https://www.defender2.net/forum/topic66670.html JD 2008 TDCi 2.4 XS CSW |
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2nd Oct 2019 6:51pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6604 
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The bypass doesn't apply to the 2.2, the link isn't there to bypass.
Sounds like a "dead" 10AS to me, have you checked the fuses to it? Fuse 9 (permanent), Fuse 1 (ignition). Do the doors lock/unlock and the indicators flash using the fob? 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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2nd Oct 2019 6:57pm |
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| Crosslanes Member Since: 02 Oct 2019 Location: Stafford upon avon Posts: 10
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Hi thanks for replying
No the fob does nothing but have checked and the fob is transmitting a signal, the indicators don’t flash when door is looked either and i have power probed every fuse and all seem good, ( under drivers seat and below steering wheel) , diagnostics speak fine every module but the immobiliser module, thanks again |
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2nd Oct 2019 7:09pm |
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