Strange Closed Loop while driving
03-03-2017, 11:40 AM
#1
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Location: Italy
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Year: 1989
Model: Cherokee
Engine: 6L 4.0
Strange Closed Loop while driving
Hello guys,
running RenixCom.exe software I checked that my cherokee xj 1989 (renix)
has a "strange" Closed Loop mode.
In particular:
DELTA_ALFA (always negative) between -70 and -80
SUM_ALFA is always fixed to 0
WARMUP change from 2 to 0
On "const.$$$" the SUM_ALFA = 38
Thanks for your help.
Regards,
Lucio.
running RenixCom.exe software I checked that my cherokee xj 1989 (renix)
has a "strange" Closed Loop mode.
In particular:
DELTA_ALFA (always negative) between -70 and -80
SUM_ALFA is always fixed to 0
WARMUP change from 2 to 0
On "const.$$$" the SUM_ALFA = 38
Thanks for your help.
Regards,
Lucio.
Last edited by etnaskynet; 03-03-2017 at 11:45 AM.
07-04-2017, 08:14 AM
#2
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Join Date: Dec 2016
Location: Italy
Posts: 49
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Year: 1989
Model: Cherokee
Engine: 6L 4.0
SOLVED!!!!
I replaced the Renix ECU with another one (used) and now the battery voltage measured by the ECU is 14V (instead of 4.6V).
My ideas were right: an internal ECU component damaged.
Cause: alternator + voltage regulator fail --> overvoltage --> ECU damaged (but operative)
Corrective Action: ECU replaced --> WORKS.
Now goes in closed loop very immediately and it's perfect.
Below a screenshot of the ECU diagnose with RenixCom software.
Thanks to everybody for the support!!!
I replaced the Renix ECU with another one (used) and now the battery voltage measured by the ECU is 14V (instead of 4.6V).
My ideas were right: an internal ECU component damaged.
Cause: alternator + voltage regulator fail --> overvoltage --> ECU damaged (but operative)
Corrective Action: ECU replaced --> WORKS.
Now goes in closed loop very immediately and it's perfect.
Below a screenshot of the ECU diagnose with RenixCom software.
Thanks to everybody for the support!!!