Re: check engine light.. code p1520
Here is the trouble code chart for P1520:
Key On Engine Off: GO to HU15
Key On Engine On: GO to HU15
Continuious Memory: GO to HU15
The diagnostic chart for HU15 is:
HU15 DTCS P1516, P1517, P1518, P1519, P1520, P1537, P1538 VISUAL INSPECTION
Note: Refer to the PCM connector pin numbers in the beginning of the pinpoint test.
View linkage or cable routing. Check for any binding or improper routing. Cable core wire (if applicable) at IMRC(Inlet Manifold Runner Control)/IMSC housing attachment must have slack and lever must contact close plate stop screw. For Focus, Escort, 2.3L Ranger and 4.2L E/F Series, a visual inspection may not be appropriate. GO to HU17 . Refer to the IMRC/IMSC system description in Section 1 , Intake Air and Throttle Body, for illustrations.
Note: The IMRC/IMSC return springs are strong. Make sure the return springs operate properly and plates open and close fully. On vacuum operated systems engine must run for 20 seconds to restore vacuum then return to KOEO for testing.
Manually open and close IMRC/IMSC plates at intake manifold and feel for sticking/binding.
If a condition is indicated it says go to HU16 and if no go to HU17. It continues on and on. If you need the info send me a pm with your email and I'll copy the file and send it to you.
There was no description for the P1520 code listed on the Ford CD, only the diagnostic chart.
P1519 is Inlet Manifold Runner Control Malfunction (Stuck Closed).
'00 XLT 3.0 Exted cab
Mods: Roush hood & cai, ASP pwr pulley, hot wtr bypass, 180 therm, e-fan, Gibson exh., 4.10 l/s, FabTech lift, kyb's, bii sway bar. 31x10.50 Yokahama ATs, Panther rims, light bar, SS grille, 03 stang buckets, explorer console, hurst shifter
Last edited by littleblue; 06-12-2011 at 02:39 PM.