Chrysler 2005 Crossfire SRT6 Service Manual page 2180

9 - 256 ENGINE - ELECTRICAL DIAGNOSTICS
(P0173) FUEL SYSTEM 2/1 RICH CONTROL OVER LIMIT (AT LOAD) (CONTINUED)
4.
O2 SENSOR OPERATION
Note: If one of the O2 Sensors Signal or Ground circuits are
shorted to ground or voltage, all the other O2 Sensor voltage
readings will be affected.
Note: After the repairs have been made, verify proper O2 Sensor
operation. If all the O2 Sensor voltage readings have not returned
to normal, follow the diagnostic procedure for the remaining O2
Sensors.
Start the engine.
Allow the engine to reach normal operating temperature.
With the DRB III , read the O2 Sensor voltage.
Is the voltage switching between 0.4 and 0.6 volt?
Yes >> Go To 5
No >> Go To 9
5.
O2 SENSOR HEATER OPERATION
Turn the ignition off.
Note: Allow the O2 Sensor to cool down before continuing the
test. Raising the hood may help in reducing under hood temper-
atures.
Connect a jumper wire between ground and the Oxygen Sensor
Heater Control circuit at the PCM harness connector leaving the har-
ness connector connected to the PCM.
Turn the ignition on.
With the DRB III , monitor O2 Sensor voltage for at least 2 minutes.
CAUTION: Remove the jumper wire after this Step is complete.
Does the voltage stay above 0.6 volt?
Yes >> Replace the Oxygen Sensor. (Refer to 14 - FUEL SYS-
TEM/FUEL INJECTION/O2 SENSOR - REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
No >> Go To 6
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