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Old 06-28-2011, 07:49 AM
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Possible bad sensor?

Hey guys,
Just got around to checking my voltage. My MAP is 1.231V and my EBP 0.86V with KOEO. With KOER, My EBP jumps to 1.22V. According to a TSB (below) they should be about the same. One of them is obviously bad, but which one? I'm located in Surprise, AZ, which is about 1100 ft.

Quote:
Typically, this is 14.7 PSI/0.88-0.9 volts at sea level, decreasing one PSI/0.10 volt for every 2000 feet of elevation. It should be within 0.5 PSI of BARO and MAP sensor pressure signals.
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Old 06-28-2011, 08:04 AM
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Well if your engine isn't running you shouldn't have any EBP so it stands to reason that it would jump with the engine running. What was your map at for the KOER?
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Old 06-28-2011, 08:12 AM
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Here's some more info from the AE datalog.

KOEO KOER
Baro 30.82 30.82
MAP 13.92 14.1
EBP 14.3 17.9
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Old 06-28-2011, 11:59 AM
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After further review, I am thinking my MAP sensor is bad and the PCM commands the turbo to increase EBP so that they are consistent. Does anyone know if there is a way to check?
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Old 06-28-2011, 12:21 PM
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MAP sensor reference voltage from the "book"
Key on, engine off 1.35
Low Idle 1.41
High Idle 1.61
Operating range 0.5 - 4.5
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Old 06-28-2011, 12:24 PM
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PID for MAP
key on: 96 (14)
low idle: 96 (14)
High idle: 103 (15)
Operating range: 41-324 (6-47)

kPa (psi)

Don't know if those will help, but that is what I found.
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Old 06-28-2011, 12:33 PM
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Hmmm, well the MAP signal matches those from the book. Do you also have the EBP reference values? I really appreciate your assistance.
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Old 06-28-2011, 12:41 PM
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What issues are you having Shawn?
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Old 06-28-2011, 12:43 PM
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EP reference voltages per the book

Key on: 1.0
Low idle: 1.2
High Idle: 1.4
operating range: 0.4 - 4.7

pid's to follow
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Old 06-28-2011, 12:48 PM
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EP sensor pid:
Key on: 103 (15)
Low Idle: 110 (16)
High Idle: 110 (16)
Operating range: 55-607 (8 - 88)

kPa (PSI)


There is a pid for EP voltage as well:

EP_V:
Key on: 0.8
low idle:1.2
High Idle: 1.3
operating range: 0.4- 4.7
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