Chrysler 2005 Crossfire SRT6 Service Manual page 2168

9 - 244 ENGINE - ELECTRICAL DIAGNOSTICS
(P0172) FUEL SYSTEM 1/1 LEAN CONTROL BELOW LIMIT (AT LOAD) (CONTINUED)
2.
CHECK FOR CURRENT DTC
Note: Check for contaminates that may have damaged the O2
Sensor: contaminated fuel, unapproved silicone, oil and coolant.
Note: Diagnose any Misfire, Throttle Body, or Accelerator Pedal
Position Sensor DTC(s) first, if set along with the fuel system
DTC.
Note: If the PCM detects and stores a DTC, the PCM also stores
the engine/vehicle operating conditions under which the DTC was
set. Some of these conditions are displayed on the DRB III at the
same time the DTC is displayed.
Note: Before erasing stored DTCs, record these conditions.
Attempting to duplicate these conditions may assist when check-
ing for a DTC.
Turn the ignition on.
With the DRB III , erase PCM DTCs.
Note: It maybe necessary to road test the vehicle for this DTC to set.
With the DRB III , read PCM DTCs.
Did this DTC set again?
Yes >> Go To 3
No >> Go To 13
3.
CHECKING FUEL PRESSURE
WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRES-
SURE (EVEN WITH THE ENGINE OFF). BEFORE TESTING OR
SERVICING ANY FUEL SYSTEM HOSE, FITTING OR LINE, THE
FUEL SYSTEM PRESSURE MUST BE RELEASED.
Turn the ignition off.
Install a fuel pressure gauge.
Turn the ignition on.
With the DRB III , actuate the Fuel Pump and observe the fuel pres-
sure gauge.
Note: Fuel pressure specification is 3.7 to 4.2 bar (54 to 61 psi).
Turn the ignition off.
CAUTION: Stop All Actuations.
Choose a conclusion that best matches your fuel pressure reading.
Within Specification
Go To 4
Below Specification
Go To 12
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