Chrysler 2005 Crossfire SRT6 Service Manual page 2181

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(P0173) FUEL SYSTEM 2/1 RICH CONTROL OVER LIMIT (AT LOAD) (CONTINUED)
6.
MAP SENSOR OPERATION
Turn the ignition off.
Connect a Vacuum Gauge to a Manifold Vacuum source.
Start the engine.
Allow the engine to idle.
Note: If engine will not idle, maintain a constant RPM above idle.
With the DRB III , read the MAP Sensor vacuum value.
Is the DRB III reading within 33.9 mbar (1 in. Hg) of the Vac-
uum Gauge reading?
Yes >> Go To 7
No >> Replace the Manifold Absolute Pressure Sensor. (Refer to
14 - FUEL SYSTEM/FUEL INJECTION/MAP SENSOR -
REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
7.
ECT SENSOR OPERATION
Note: For this test to be valid, the thermostat must be operating
correctly.
Note: This test works best if performed on a cold engine (cold
soak)
Turn the engine off.
Turn the ignition on.
With the DRB III , read the Engine Coolant Temperature (ECT) Sen-
sor value. If the engine was allowed to sit overnight (cold soak), the
temperature value should be a sensible value that is somewhere close
to the ambient temperature.
Note: If engine coolant temperature is above 82°C (180°F), allow
the engine to cool until 65°C (150°F) is reached.
Start the engine.
During engine warm-up, monitor the ECT Sensor value. The temperature value change should be a smooth tran-
sition from start up to normal operating temperature 82°C (180°F). The value should reach at least 82°C (180°F).
Did the ECT value increase with a smooth transition and did it reach at least 82°C (180°F)?
Yes >> Go To 8
No >> Replace the Engine Coolant Temperature Sensor. (Refer to 7 - COOLING/ENGINE/ENGINE COOLANT
TEMP SENSOR - REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
ENGINE - ELECTRICAL DIAGNOSTICS 9 - 257