Chrysler 2005 Crossfire SRT6 Service Manual page 2037

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(P0128) FORCED LIMITED POWER EXCESSIVE HIGH COOLANT TEMP (CONTINUED)
2.
LOW COOLANT LEVEL
Note: If any ECT or Radiator Fan Control Module DTCs have set
along with this DTC, diagnose them first before continuing.
Note: If a Engine Coolant Temperature (ECT) DTC is set along
with this code, diagnose the ECT DTC first.
Note: Inspect the ECT terminals and related PCM terminals.
Ensure the terminals are free from corrosion and damage.
Note: The best way to diagnose this DTC is to allow the vehicle
to sit overnight outside in order to have a completely cold soaked
engine.
WARNING: NEVER OPEN THE COOLING SYSTEM WHEN THE
ENGINE IS HOT. THE SYSTEM IS UNDER PRESSURE. EXTREME
BURNS OR SCALDING MAY RESULT. ALLOW THE ENGINE TO
COOL BEFORE OPENING THE COOLING SYSTEM.
Check the coolant system to make sure that the coolant is in good condition and at the proper level.
Is the coolant level and condition OK?
Yes >> Go To 3
No >> Inspect the vehicle for a coolant leak and add the necessary amount of coolant.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
3.
THERMOSTAT OPERATION
Note: This test works best if performed on a cold engine (cold
soak).
Turn the ignition on.
With the DRBIII , read the ENG COOLANT TEMP 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 tempera-
ture.
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 ENG COOLANT TEMP value.
The temperature change should be a smooth transition from start up
to normal operating temp 82°C (180°F). Also, monitor the actual cool-
ant temperature with a thermometer.
Note: As the engine warms up to operating temperature, the actual coolant temperature (thermometer read-
ing) and the ENG COOLANT TEMP value in the DRB III should stay relatively close to each other.
Using the appropriate service information, determine the proper opening temperature of the thermostat.
Did the thermostat open at the proper temperature?
Yes >> Go To 4
No >> Replace the thermostat. (Refer to 7 - COOLING/ENGINE/ENGINE COOLANT THERMOSTAT -
REMOVAL).
Perform POWERTRAIN VERIFICATION TEST VER - 2.
ENGINE - ELECTRICAL DIAGNOSTICS 9 - 113