fusion158
Member Since: 08 Apr 2014
Location: California
Posts: 61
  
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| New AMK Compressor Not Working |
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I have a 2005 LR3 SE V8 and my original Hitachi compressor finally died. Thankfully I had the new AMK upgrade kit on hand the I got from a friend in exchange for a bottle of Bushmills 8)
Anyway, I installed the new compressor, carefully following the steps and installation was a breeze. I then updated the ECU with the necessery AMK software using my GAP tool and it was successful. I installed the new relay and then I started the car. I hear the suspension try to adjust the height of the car and nothing happens. Compressor does not engage at all. Then I get the usual suspension error.
I turned off the car and reset the errors. I disconnected the compressor power connector and connected my multimeter and started the car while watching the multimeter. It remained at 0V the whole time. I checked the fuse and it is good. I checked the new relay on the bench and it is working as well.
I am now out of ideas. Has anyone got any suggestions on how to fix this?
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 9th Jan 2022 10:19 pm |
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fusion158
Member Since: 08 Apr 2014
Location: California
Posts: 61
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Error code is:
C1A20-64 (2E) Pressure Increase too slow when filling reservoir - Algorithim based failure - signal plausibility failure.
This error maskes sense since the compressor is not running at all.
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| 9th Jan 2022 11:30 pm |
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Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1782
  
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Remove the relay and jumper the two large slots - compressor should run. Fuse was changed from 60 to 70 amp.
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| 10th Jan 2022 9:01 am |
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fusion158
Member Since: 08 Apr 2014
Location: California
Posts: 61
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Globetrotter448 wrote:Remove the relay and jumper the two large slots - compressor should run. Fuse was changed from 60 to 70 amp.
I'll give that a try when I get home from work.
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| 10th Jan 2022 9:41 pm |
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fusion158
Member Since: 08 Apr 2014
Location: California
Posts: 61
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Did the test and harness is ok. Getting correct voltage to the compressor connector. I did notice that the some part of the compressor was making a weird high pitched sound even when the car was off. It would only stop when the 6 pin connector was disconnected. Anyone got any ideas?
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| 11th Jan 2022 7:47 am |
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Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1782
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I think that connector has the exhaust valve and sensor wires in it so noise could be exhaust valve leaking
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| 12th Jan 2022 8:22 am |
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Justme
Member Since: 09 Aug 2015
Location: Pwllheli North Wales
Posts: 104
 
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You might be getting voltage at the pins but are you getting current?
Test with a load not a DVM.
You could have a mad joint / high resistance that will allow the volts to show ok but the power cant flow.
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| 12th Jan 2022 10:12 am |
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fusion158
Member Since: 08 Apr 2014
Location: California
Posts: 61
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Globetrotter448 wrote:I think that connector has the exhaust valve and sensor wires in it so noise could be exhaust valve leaking
Definitely not exhaust valve leaking. System is depressurized. I should clarify it's a high pitch electrical noise.
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| 12th Jan 2022 6:32 pm |
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fusion158
Member Since: 08 Apr 2014
Location: California
Posts: 61
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Justme wrote:You might be getting voltage at the pins but are you getting current?
Test with a load not a DVM.
You could have a mad joint / high resistance that will allow the volts to show ok but the power cant flow.
I'll check if I can borrow a meter than can read the high current. My meter can only read a maximum of 10 amps. In the mean time I will see if I can check the resistance from the harness connector to the compressor motor.
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| 12th Jan 2022 6:34 pm |
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