P1380

Circuit Description
This diagnostic DTC is used to determine when the EBTCM has lost the ability to provide rough road data to the PCM for misfire detection (DTC P0300). When the PCM sees this condition is present via serial data. DTC P1380 will set.

Conditions for Running the DTC
^ Engine speed 7969 RPM or less.
^ Engine load 79.7% or less.
^ DTC P0300 is set and requesting the MIL ON.

Conditions for Setting the DTC
Rough road indicator not being sent by EBTCM.

Action Taken When the DTC Sets
^ The Malfunction Indicator Lamp (MIL) will not illuminate.
^ No message will be displayed.

Conditions for Clearing the DTC
^ A History DTC will clear after forty consecutive warm-up cycles with no failures of any non-emission related diagnostic test.
^ A Last Test Failed (current) DTC will clear when the diagnostic runs and does not tail.
^ Use a scan tool to clear DTCs.
^ Interrupting PCM battery voltage may or may not clear DTCs. This practice is not recommended.

Diagnostic Aids
If this DTC is set along with DTC P0300, it may represent an invalid misfire due to a loss of rough road data.
Several ABS system problems could cause a loss of rough road indication from the EBTCM. All ABS/TCS system problems and DTCs should be corrected first. Then duplicate the conditions under which DTC P1380 set and see if the problem reoccurs.

Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.
2. Other conditions may cause this DTC to set. Diagnose them first.