Section 12 (Anti-Lock Brake System (Fwd))
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 1990 Pontiac Bonneville, 1990 Oldsmobile Ninety-Eight, 1990 Oldsmobile Eighty-Eight, 1990 Cadillac Fleetwood, and 1990 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
- Description
- Operation
- Bleeding Brake System
- Abs Function Check
- Symptom Diagnosis Charts
- Notes
- Abs Diagnostic Codes
- Abs Code-To-Test Menu
- Chart A1, Codes 11 & 12 - EBCM Problem
- Chart A-2, Code 21 - Main Valve
- Chart A3, Code 22 - Left Front Inlet Valve
- Chart A4, Code 23 - Left Front Outlet Valve
- Chart A5, Code 24 - Right Front Inlet Valve
- Chart A6, Code 25 - Right Front Outlet Valve
- Chart A7, Code 26 - Right Inlet Valve
- Chart A8, Code 27 - Rear Outlet Valve
- Chart A9, Codes 31/35/41/55 Or 75 - Left Front Sensor
- Chart A10, Codes 32/36/42/56 Or 76 - Right Front Sensor
- Chart A-11, Codes 33/37/43/57 Or 77 - Right Rear Sensor
- Chart A-12, Codes 34/38/44/58/78 - Left Rear Sensor
- Chart A-13, Codes 45/46/47/48 - Missing Wheel Sensor Signal
- Chart A-14, Codes 51-54/71-74 - Pressure Reduction Fault
- Pressure Fault Menu
- Chart A-15, Code 61 - Low Fluid Pressure
- Chart B, Abs Lamp "On"
- Chart B1, Ignition Enable Circuit
- Chart B2, EBCM Loop Circuit Open
- Chart B3, EBCM Loop Grounded
- Chart B4, Main Relay Circuit
- Chart B5, Abs Lamp Circuits
- Chart B6, Miscellaneous EBCM Inputs
- Chart C, Brake Lamp "On"
- Chart D, Abs & Brake Lamps "On"
- Chart D1, Pump Inoperative
- Chart D2, Hydraulic Unit Functional Check
- Chart D4, Extended Pump Operation
- Chart D5, Pressure SWTCH Performance
- Chart D6, Hydraulic Unit LEAKDOWN
- Chart E, Symptom Diagnosis
- Symptom-To-Chart Menu
- Chart E1, Abs Lamp Inoperative
- Chart E2, Abs Lamp Dim
- Chart E3, Valve Chatter During Stops
- Chart E-4, Low Or Spongy Brake Pedal
- Chart E5, Poor Tracking During Stops
- Test F, Wheel Sensor Output
- Chart F1, RR Sensor Output
- Chart F2, LF Sensor Output
- Chart F3, LR Sensor Output
- Chart F4, RF Sensor Output
- Chart G, Solenoid Valve Operational Test
- Diagnosis & Testing
- Note On INTERMITTENTS
- Installing Pressure Gauge
- Abs Safety Precautions
- Removal & Installation
- Wiring Diagrams