Chrysler 2005 Crossfire SRT6 Service Manual page 2183

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(P0173) FUEL SYSTEM 2/1 RICH CONTROL OVER LIMIT (AT LOAD) (CONTINUED)
10.
O2 SENSOR SIGNAL CIRCUIT
With the ignition on.
With the DRB III , monitor the O2 Sensor voltage.
Is the voltage below 0.45 volt?
Yes >> Go To 11
No >> Check the O2 Signal circuit for a short to ground, open, or
short to voltage. Inspect the O2 Sensor connector and the
PCM harness connector. If OK, replace and program the
Powertrain Control Module. (Refer to 8 - ELECTRICAL/
ELECTRONIC
CONTROL MODULE - REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
11.
SENSOR GROUND CIRCUIT
With the ignition on.
Measure the voltage of the Sensor Ground circuit at the O2 Sensor
harness connector.
Is the voltage below 0.1 volt?
Yes >> Check the fuel system for contaminates. Also, check the
exhaust system for any leaks. (Refer to 11 - EXHAUST
SYSTEM - INSPECTION).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
No >> Check the Sensor Ground circuit for a short to ground,
open, or short to voltage. Inspect the O2 Sensor connector
and the PCM harness connector. If OK, replace and pro-
gram the Powertrain Control Module. (Refer to 8 - ELEC-
TRICAL/ELECTRONIC
POWERTRAIN CONTROL MODULE - REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
12.
FUEL PUMP INLET STRAINER
WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE (EVEN WITH THE ENGINE OFF).
BEFORE TESTING OR SERVICING ANY FUEL SYSTEM HOSE, FITTING OR LINE, THE FUEL SYSTEM PRES-
SURE MUST BE RELEASED
With the ignition off.
Remove and inspect the Fuel Pump Inlet Strainer.
Is the Fuel Pump Inlet Strainer plugged?
Yes >> Replace the Fuel Pump Inlet Strainer. (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY/FUEL FILTER -
REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
No >> Replace the Fuel Pump. (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY/FUEL PUMP - REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
CONTROL MODULES/POWERTRAIN
CONTROL
ENGINE - ELECTRICAL DIAGNOSTICS 9 - 259
MODULES/