Chrysler 2005 Crossfire SRT6 Service Manual page 2040

9 - 116 ENGINE - ELECTRICAL DIAGNOSTICS
(P0128) THERMOSTAT RATIONALITY (CONTINUED)
When Monitored and Set Condition
• When Monitored: With the engine running.
• Set Condition: The PCM predicts a coolant temperature value that it will compare to the actual coolant tem-
perature. If the two coolant temperature values are not within 10°C (18°F) of each other, this DTC is set.
LOW COOLANT LEVEL
THERMOSTAT OPERATION
ENGINE COOLANT TEMPERATURE SIGNAL CIRCUIT SHORT TO VOLTAGE
ENGINE COOLANT TEMPERATURE SIGNAL CIRCUIT OPEN
ENGINE COOLANT TEMPERATURE SIGNAL CIRCUIT SHORT TO GROUND
ENGINE COOLANT TEMPERATURE SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIRCUIT
SENSOR GROUND CIRCUIT OPEN
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
POWERTRAIN CONTROL MODULE
For a complete Powertrain Control Module Circuit Diagram, (Refer to 9 - ENGINE - SCHEMATICS AND DIA-
GRAMS).
Diagnostic Test
1.
PRE-DIAGNOSTIC CHECK OUT
Note: Always perform diagnostics with a fully charged battery.
Note: Check connectors — Clean/repair as necessary. Poor pin to
terminal connections can set DTCs.
Note: Check for applicable TSBs related to the problem.
Turn the ignition on.
With the DRB III , read PCM DTCs.
Using the wiring diagram/schematic as a guide, inspect the wiring and
connectors. Repair as necessary.
Perform this procedure prior to symptom diagnosis.
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POSSIBLE CAUSES
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