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Home >> Cadillac >> 1990 >> Allante 440T4/ME9 >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Computer Module >> Self-Diagnostic System >> Diagnostic Trouble Code Definitions
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Diagnostic Trouble Code Definitions

NOTE: For information on ECM diagnostic trouble code diagnosis, see SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
BCM DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC Description
B110 (1) Outside Temperature Sensor Circuit
B111 (1) A/C High Side Temperature Sensor
B112 (1) A/C Low Side Temperature Sensor
B113 (1) In-Car Temperature Sensor Circuit
B115 (1) Sunload Sensor Circuit
B119  Twilight Photocell Circuit
B120  Twilight Delay Switch Pot Circuit
B120 & B122  Twilight Delay & Panel Dimming
B122 (2) Panel Dimming Switch
B124  Vehicle Speed Sensor Circuit
B127 (2) PRND321 Sensor
B132 (2) Oil Pressure Sensor Circuit
EO47 (3) , B333 B334  , B335  , B336  Or B337  Multiple Intermittent Data Codes
B333  Loss Of DERM Data
B334  Loss Of ECM Data
B335  Loss Of CCDIC Data
B336  Loss Of IPC Data
B337  Loss Of HVAC Programmer Data
B410 (4) Charging System Problem
B411 Or B412 (4) Battery Voltage Too Low Or Too High
B420  Relay Circuits
B421  Relay Circuits
B440 (1) HVAC - Air Mix Door Circuit
B441 (1) Cooling Fans Problem
B446, B447 Or B448 (1) Refrigerant System Problem
B449 (1) HVAC - High Side Temperature Too High
B450 (1) HVAC - Coolant Temperature To High
B480 (5) Anti-Lock/TCS Data Problem
B552  BCM Keep Alive Memory Error
B556  Odometer EEPROM Error
(1) Perform appropriate test in AUTOMATIC A/C-HEATER SYSTEMS article.
(2) Perform appropriate test in INSTRUMENT PANEL article.
(3) Perform appropriate test in ENGINE PERFORMANCE, SELF-DIAGNOSTICS article.
(4) Perform appropriate test in STARTING & CHARGING SYSTEM article.
(5) Perform appropriate test in BRAKES article.
NOTE: Lighting codes (L-Codes) are set by the BCM when a fault is detected with the distributed lighting system. To effectively determine a fault in the lighting system, LIGHTING Chart A-1 must be followed or misdiagnosis may result. See LIGHTING CHART A-1: L - CODE DIAGNOSIS  .
LIGHTING DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC Description Go To
L010 Redundant Taillamp Relay L010 
L011 Redundant Headlamp Relay L011 
L110 LCP Communication Failure L110 
L202 OSM No. 2 Communication Failure L202 
L203 OSM No. 3 Communication Failure L203 
L204 OSM No. 4 Communication Failure L204 
L205 OSM No. 5 Communication Failure L205 
206 OSM No. 6 Communication Failure L206 
L207 OSM No. 7 Communication Failure L207 
L208 OSM No. 13 Communication Failure L208 
L209 OSM No. 9 Communication Failure L209 
L210 OSM No. 10 Communication Failure L210 
L302 OSM No. 2 Output Failure ALL 300 "L" SERIES DTC'S 
L303 OSM No. 3 Output Failure ALL 300 "L" SERIES DTC'S 
L304 OSM No. 4 Output Failure ALL 300 "L" SERIES DTC'S 
L305 OSM No. 5 Output Failure ALL 300 "L" SERIES DTC'S 
L306 OSM No. 6 Output Failure ALL 300 "L" SERIES DTC'S 
L307 OSM No. 7 Output Failure ALL 300 "L" SERIES DTC'S 
L308 OSM No. 13 Output Failure ALL 300 "L" SERIES DTC'S 
L309 OSM No. 9 Output Failure ALL 300 "L" SERIES DTC'S 
L310
OSM No. 10 Output Failure		 ALL 300 "L" SERIES DTC'S 
L411 Lighting System Low Voltage Warning L411 
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