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Author Topic:  Need Electrical Help - 2010 SHO 5V Reference Circuit  (Read 226 times)

Offline guitar333

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Need Electrical Help - 2010 SHO 5V Reference Circuit
« on: October 03, 2021, 08:52:46 PM »
Hey guys,

My 2010 SHO starts but runs pretty rough.


Codes:
P0193: Fuel Rail Pressure Sensor Circuit A High
P0236: Turbo Boost Sensor A Circuit Range
P0642: 5V Sensor Reference Circuit Low


The Turbo Boost, Fuel Rail Pressure, and MAP sensors all share this same 5V reference - which is only reading .3V.
I remove the intake and did a visual inspection of the wiring and can't find any chaffing/short etc
I unplugged the 3 sensors on this circuit and still was only getting .3V at the ECM so i replaced even replaced the computer.....still have the same issue (doh!)


I'm getting 5 volts at pins 1 and 3 of both the MAP and TCBP connectors and only .3v on the reference circuit


Any ideas or hand holding before I throw in the towel? Anybody have access to the pinout tests?


Thanks!!




« Last Edit: October 03, 2021, 09:09:24 PM by guitar333 »
2010 SHO - CAI, Downpipes, CR Rebuilt Turbos, LMS SIII Tune, H&R

1990 SHO - 3.2 Supercharged, all the modz

Offline guitar333

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Re: Need Electrical Help - 2010 SHO 5V Reference Circuit
« Reply #1 on: October 03, 2021, 08:55:23 PM »

CODES:

DIAGRAM:

Connectors:
2010 SHO - CAI, Downpipes, CR Rebuilt Turbos, LMS SIII Tune, H&R

1990 SHO - 3.2 Supercharged, all the modz

 

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