Self-Diagnostics. Cadillac DeVille 1999

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 1999 🢒 DeVille 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 Self-Diagnostics

The following components contain self-diagnostics:

•	The heater and A/C programmer

•	The Climate Control Panel (CCP)

When these self-diagnostics are accessed by the on-board diagnostics or by the use of a Scan Tool , the self-diagnostics will identify the source of any system malfunction as specifically as possible. This identification will differentiate between current type or non-current (history) type malfunctions.

The on-board diagnostics will only allow the following functions:

•	Viewing the DTCs

•	Clearing of the DTCs

Use the Scan Tool to perform any tests or overrides.

The following A/C diagnostic trouble codes (DTCs) will assist with the diagnosis:

DTC	Description
B1310	DTC B1310 Ambient Air Temp Sensor Open Circuit
B1311	DTC B1311 Outside Air Temp Sensor Short Circuit
B1312	DTC B1312 High Side Temp Sensor Open Circuit
B1313	DTC B1313 High Side Temp Sensor Short Circuit
B1314	DTC B1314 Evaporator Inlet Temp Sensor Open CKT
B1315	DTC B1315 Evaporator Inlet Temp Sensor Short CKT
B1316	DTC B1316 In Car Temperature Sensor Open Circuit
B1317	DTC B1317 In Car Temperature Sensor Short Circuit
B1318	DTC B1318 Sunload Sensor Open Circuit
B1319	DTC B1319 Sunload Sensor Short Circuit
B1340	DTC B1340 Air Mix Door #1 Movement Problem
B1341	DTC B1341 Air Mix Door #2 Movement Problem
B1347	DTC B1347 Very Low A/C Refrigerant Warning
B1348	DTC B1348 Very Low A/C Refrigerant Pressure
B1350	DTC B1350 Engine Coolant Over-Temperature
B1982	Diagnostic System Check - Body Control System in Body Control System.
B1981	Diagnostic System Check - Body Control System in Body Control System.
U1016	Diagnostic System Check - Data Link Communications in Data Link Communications.
U1064	Diagnostic System Check - Data Link Communications in Data Link Communications.
U1096	Diagnostic System Check - Data Link Communications in Data Link Communications.
U1152	Diagnostic System Check - Data Link Communications in Data Link Communications.
U1153	Diagnostic System Check - Data Link Communications in Data Link Communications.
U1169	Diagnostic System Check - Data Link Communications in Data Link Communications.
U1255	Diagnostic System Check - Data Link Communications in Data Link Communications.