1993 Cadillac AllanteFACTORY OEM SERVICE PROCEDURE

Diagnostic Trouble Code Definitions

BCM DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC Description
B110 (1) Outside Temperature Sensor Circuit
B111 (1) A/C High Side Temperature Sensor Circuit
B112 (1) A/C Low Side Temperature Sensor Circuit
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 Switch
B122 (2) Panel Dimming Failure
B132 (2) Oil Pressure Sensor Failure
B333 B334  , B335  , B336  , B337  Or B339 Multiple Intermittent Data Codes
B332 (3) Loss Of ABS/TCS Data
B333  Loss Of DERM Data
B334  Loss Of PCM Data
B335  Loss Of Combo Panel Data
B336  Loss Of IPC Data
B337  Loss Of HVAC Programmer Data
B339 (4) Loss Of Road Sensing Suspension (RSS) Data
B410 (5) Charging System Circuit
B411 Or B412 (5) Battery Voltage Too Low Or Too High
B440 (1) Air Mix Valve (Door) Circuit Problem
B446 Or B447 (1) Low Refrigerant Charge
B448 (1) Low Refrigerant Pressure
B446, B447 Or B448 (1) Refrigerant System Problem
B449 (1) HVAC - High Side Temperature Too High
B450 (1) HVAC - Coolant Temperature To High
B552  BCM Keep Alive Memory Error
B556  Odometer EEPROM Error
L110  Headlight Switch Communication Failure
L411  Lighting System Low Voltage Warning
(1) Perform appropriate test in AUTOMATIC A/C-HEATER SYSTEMS -- ALLANTE article in HEATING & AIR CONDITIONING.
(2) Perform appropriate test in INSTRUMENT PANELS -- ALLANTE article in ACCESSORIES & EQUIPMENT.
(3) Perform appropriate test in ANTI-LOCK & TRACTION CONTROL -- ALLANTE article in BRAKES.
(4) Perform appropriate test in ELECTRONIC -- SPEED DEPENDENT DAMPING -- ALLANTE article in SUSPENSION.
(5) Perform appropriate test in GENERATORS & REGULATORS -- ALLANTE article in STARTING & CHARGING SYSTEMS.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.