Circuit Description
In order to reduce the engine temperature the PCM has the ability to
disable a number of fuel injectors during an engine over temperature condition.
The PCM considers the engine over temperature whenever the ECT reaches
131°C (268°F). This DTC sets in order to show that the PCM detected
an over temperature condition and the PCM enabled the protection mode.
Conditions for Running the DTC
| • | DTCs P0117, P0118, P0125 are not set. |
Conditions for Setting the DTC
| • | The engine coolant temperature is greater than 132°C (270°F). |
| • | The above conditions exist for more than 10 seconds. |
Action Taken When the DTC Sets
| • | The PCM illuminates the malfunction indicator lamp (MIL) when
the diagnostic runs and fails. |
| • | The PCM records the operating conditions at the time the diagnostic
fails. The PCM stores this information in the Freeze Frame and/or Failure
Records. |
Conditions for Clearing the MIL/DTC
| • | The PCM turns OFF the malfunction indicator lamp (MIL) after
3 consecutive ignition cycles that the diagnostic runs and does not
fail. |
| • | A last test failed, or current DTC, clears when the diagnostic
runs and does not fail. |
| • | A history DTC clears after 40 consecutive warm-up cycles,
if no failures are reported by this or any other emission related diagnostic. |
| • | Use a scan tool in order to clear the MIL and the DTC. |
Diagnostic Aids
Important:
| • | Remove any debris from the PCM\TAC module connector surfaces before
servicing the PCM\TAC module. Inspect the PCM\TAC module connector gaskets
when diagnosing/replacing the modules. Ensure that the gaskets are
installed correctly. The gaskets prevent contaminate intrusion into
the PCM\TAC modules. |
| • | For any test that requires probing the PCM or a component
harness connector, use the Connector Test Adapter Kit J 35616
. Using this kit prevents damage
to the harness/component terminals. Refer to
Using Connector Test Adapters
in Wiring Systems. |
| • | If an overheating condition exists, repair the overheat condition
and change the engine oil and filter. |
| • | Using the Freeze Frame and/or Failure Records data may aid in
locating an intermittent condition. If you cannot duplicate the DTC, the information
included in the Freeze Frame and/or Failure Records data can help
determine how many miles since the DTC set. The Fail Counter and
Pass Counter can also help determine how many ignition cycles the
diagnostic reported a pass and/or a fail. Operate the vehicle within
the same freeze frame conditions (RPM, load, vehicle speed, temperature
etc.) that you observed. This will isolate when the DTC failed. |
| • | For an intermittent condition, refer to
Symptoms
. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
A cooling system condition will enable the engine protection mode.
Refer to
Engine Overheating
in Engine Cooling.
