Conditions Which Generate This Code:
The ECM detects the following conditions:
• The signal voltage from the ambient air temperature sensor is greater than 4.92 VDC for
more than eight seconds.
• The “Allow Idle Shutdown Override” parameter is programmed to “Outside Temperature Based” or
“J1587 Outside Temperature Based”.
• The ECM has been powered for at least two seconds.
System Response:
The ECM will default to 65 C (149 F) for outside air temperature. “DIAG” will be displayed next to
the status for “Outside Temperature Sensor” on the electronic service tool.
Possible Performance Effect:
“Allow Idle Shutdown Override” is disabled while this code is Active.
Troubleshooting:
Perform the following diagnostic procedure: “Engine Temperature Sensor Open or Short Circuit – Test”
Results:
• OK – STOP.
