Circuit Description
The Coolant Temperature telltale on the instrument panel (I/P) has the ability
to illuminate as a result of an engine overtemperature condition. The PCM will send
a message to the I/P cluster over the Class II link to turn the Coolant Temperature
telltale On if the engine coolant temperature (ECT) exceeds the temperature calibration
value listed under DTC parameters. The coolant temperature gage will read approximately
7/8 of the way toward HOT when the telltale is turned On.
Conditions for Setting the DTC
DTC P0217 will set if:
| • | Engine coolant temperature (ECT) is greater than 118°C (244°F) |
| • | No other ECT sensor DTCs have been set |
DTC P0217 diagnostics run continuously once the above conditions have
been met.
P0217 is a (type D) DTC
Diagnostic Aids
Possible causes of DTC P0217:
| • | Cooling fan(s) inoperative |
| • | Engine cooling system overheated condition (thermostat, low engine coolant
etc.) |
| • | Radiator or condenser air flow restricted |
| • | Air dam missing or loose |
| • | Overload due to trailer towing |
| • | ECT sensor leaking engine coolant into ECT sensor harness connector causing
elevated temperatures |
Refer to ECT Sensor General Description for a Temperature vs. Resistance chart.
The PCM will command the A/C relay Off if the temperature of the engine coolant
is greater than 120°C (248°F) to protect the engine and transaxle.
