<TABLE cellSpacing=0 width="95%"><TBODY><TR><TD>AU: Manifold Absolute Pressure (MAP)/Barometric Pressure (BARO) Correlation
</TD><TD align=right width="25%">http://www.fordtechservice.dealerconnection.com/pubs/auxf/~WS-V-B/3829/arrowbak.gif AU: Introduction (http://www.fordtechservice.dealerconnection.com/pubs/content/~WV5C/~MUS~LEN/15/V5C5082.htm)</TD></TR></TBODY></TABLE>
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AU1 PRELIMINARY DIAGNOSIS FOR DTC P0069
Retrieve and record all DTCs.
Record the freeze frame data.
Clear all DTCs.
Carry out the KOEO on-demand self-test.
Carry out the continuous on-demand self-test.Is DTC P0069 present along with other DTCs?
<TABLE cellSpacing=0 cellPadding=3 width="92%" border=1><TBODY><TR><TH width="50%">Yes </TH><TH width="50%">No </TH></TR><TR><TD width="50%">REFER to Section 4 (http://www.fordtechservice.dealerconnection.com/renderers/reload_frames.asp?leftside=/pubs/content/~WV5C/~MUS~LEN/17/V5Cs4l.htm&rightside=/pubs/content/~WV5C/~MUS~LEN/17/V5Cs4r.htm&contenttype=PCED&workunit=V5C&market=US&language=EN&viewer=IE) Diagnostic Trouble Code (DTC) Descriptions. to continue diagnosis.
For DTC P0069 only, GO to AU2 (http://www.fordtechservice.dealerconnection.com/pubs/content/~WV5C/~MUS~LEN/15/V5C5083.htm#pptAU2) . </TD><TD width="50%">UNABLE to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the fault. REPAIR as necessary. REFER to Section 3 (http://www.fordtechservice.dealerconnection.com/renderers/reload_frames.asp?leftside=/pubs/content/~WV5C/~MUS~LEN/17/V5Cs3l.htm&rightside=/pubs/content/~WV5C/~MUS~LEN/17/V5Cs3r.htm&contenttype=PCED&workunit=V5C&market=US&language=EN&viewer=IE) if a driveability concern exists. </TD></TR></TBODY></TABLE>
AU2 DIAGNOSTIC TROUBLE CODE (DTC) P0069
Note: Most weather reports include a local barometric pressure that has been corrected to factor in sea level. However, the BARO PID reports the barometric pressure for the vehicle's actual altitude. Local weather conditions (high or low pressure) change the local barometric pressure by several inches of mercury.
Possible causes:
BARO sensor
MAP sensor
PCM
Key ON, engine OFF.
Access the BARO and MAP PIDs.
Record the BARO and MAP values.
Verify that the BARO PID reading is approximately the same as the barometric pressure reading for the location, day, and altitude where the vehicle is being repaired.Does the BARO PID reading compare with the daily barometric report for the local area?
<TABLE cellSpacing=0 cellPadding=3 width="92%" border=1><TBODY><TR><TH width="50%">Yes </TH><TH width="50%">No </TH></TR><TR><TD width="50%">GO to AU3 (http://www.fordtechservice.dealerconnection.com/pubs/content/~WV5C/~MUS~LEN/15/V5C5083.htm#pptAU3) . </TD><TD width="50%">INSTALL a new BARO sensor. CLEAR the DTCs. REPEAT the self-test. </TD></TR></TBODY></TABLE>
AU3 COMPARE THE BARO KOER AND KOEO READINGS
Key ON, engine running.
Access the BARO PID.
Compare the BARO KOER value with the KOEO value.Is the BARO PID value equal to the recorded value?
<TABLE cellSpacing=0 cellPadding=3 width="92%" border=1><TBODY><TR><TH width="50%">Yes </TH><TH width="50%">No </TH></TR><TR><TD width="50%">GO to AU4 (http://www.fordtechservice.dealerconnection.com/pubs/content/~WV5C/~MUS~LEN/15/V5C5083.htm#pptAU4) . </TD><TD width="50%">INSTALL a new BARO sensor. CLEAR the DTCs. REPEAT the self-test. </TD></TR></TBODY></TABLE>
AU4 COMPARE THE KOER BARO AND MAP PID VALUES
Key ON, engine running.
Access the BARO and MAP PIDs.
Compare the BARO and MAP values with the KOEO values.Is the MAP sensor reading within 30 kPa (4.3 psi) of the BARO reading?
<TABLE cellSpacing=0 cellPadding=3 width="92%" border=1><TBODY><TR><TH width="50%">Yes </TH><TH width="50%">No </TH></TR><TR><TD width="50%">INSTALL a new PCM. CLEAR the DTCs. REPEAT the self-test. </TD><TD width="50%">CHECK the MAP sensor hose for damage. REPLACE the hose if a concern is found. If no hose concern is detected, INSTALL a new MAP sensor. CLEAR the DTCs. REPEAT the self-test. </TD></TR></TBODY></TABLE>