Section 4 (Engine Controls - Tests W/Codes - Pcm/BCM)
WARNING: This page is about a different car, the 1993 Buick Riviera and 1992 Buick Riviera. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Self-Diagnostic System
- Diagnostic Charts
- Self-Diagnostic System Check
- Chart A-1, No Service Engine Soon Light
- Chart A-2, Service Engine Soon Light Won't Go Out Or Flash
- Chart A, Blank Odometer Display
- Chart B, Odometer Displays Error (Loss Of Serial Data)
- Chart B-1, BCM Power & Grounds
- Chart C, ECCP Display Problems (Loss Of ECCP Communications)
- Chart D-1, Grounded Serial Data Circuit
- Chart D-2, Serial Data Circuit Shorted To Voltage
- Code B110, Outside Temperature Sensor Circuit
- Code B111, A/C High Side, Temperature Sensor Circuit
- Code B112, A/C Low Side Temperature Sensor Circuit
- Code B113, In-Car Temperature Sensor Circuit
- Code B115, Sun Load Sensor Circuit
- Code B119, Twilight Photocell Circuit
- Code B120, Twilight Delay Potentiometer
- Code B120 & B122, Twilight Delay & Panel Dimming
- Code B121, Twilight Enable Switch Circuit
- Code B122, Panel Dimming Potentiometer Circuit
- Code B123, Courtesy Lamp Switch Circuit
- Code B132, Engine Oil Pressure Sensor Circuit Faulty
- Code B333, Loss Of Supplemental Inflatable Restraint (Sir) Data
- Code B334, Loss Of ECM Data
- Code B335, Loss Of ECCP Serial Data
- Code B336, Loss Of IPC Serial Data
- Code B337, Loss Of HVAC Programmer Data
- Serial Data Circuit, Multiple Intermittent Codes
- Code B410, Charging System Circuit Fault
- Code B411 Or B412, Battery Voltage Too High Or Too Low
- Code B440, Air Mix Valve (Door) Circuit Problem
- Codes B446, B447 & B448, Refrigerant System Problem (1 Of 2)
- Codes B446, B447 & B448, Refrigerant System Problem (2 Of 2)
- Code B449, A/C High Side Temperature Too High
- Code B450, Coolant Temperature Too High
- Code B552, BCM Keep Alive Memory Error
- Code B556, Odometer (Ee) Prom Error