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Home >> Saab >> 1997 >> 9000 CS, Automatic >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Self-Diagnostics >> Final Check

Final Check

  1. If all tests have been performed for relevant DTC without any faults being discovered, it is possible that ABS ECU is defective. Ensure following steps are performed before replacing ABS ECU.
  2. Check wheel size. Ensure all wheels are same height and width. Ensure air pressure is correct in all tires. Check for play in wheel bearings and correct as necessary. Check all grounds and power supply to ABS ECU.
  3. Clear DTC and test drive vehicle. Retrieve DTCs. If DTC returns, replace ABS ECU.
ABS DTCs

Continuous DTC (Intermittent DTC) (1) Problem
(775B1) ABS ECU Fault
(775B2) ABS ECU Fault (RAM)
42251 (22251)  Defective System Relay
44221 (24221)  No Signal From Left Front Wheel Sensor
44222 (24222)  No Signal From Right Front Wheel Sensor
44223 (24223)  No Signal From Left Rear Wheel Sensor
44224 (24224)  No Signal From Right Rear Wheel Sensor
(2422A)  Incorrect Signal From Left Front Wheel Sensor (Greater Than 25 MPH)
(2422B)  Incorrect Signal From Right Front Wheel Sensor (Greater Than 25 MPH)
(2422C)  Incorrect Signal From Left Rear Wheel Sensor (Greater Than 25 MPH)
(2422D)  Incorrect Signal From Right Rear Wheel Sensor (Greater Than 25 MPH)
(24291)  Incorrect Signal From Left Front Wheel Sensor (Less Than 25 MPH)
(24292)  Incorrect Signal From Right Front Wheel Sensor (Less Than 25 MPH)
(24293)  Incorrect Signal From Left Rear Wheel Sensor (Less Than 25 MPH)
(24294)  Incorrect Signal From Right Rear Wheel Sensor (Less Than 25 MPH)
(24251)  Incorrect Signal From Left Front Wheel Sensor
(24252)  Incorrect Signal From Right Front Wheel Sensor
(24253)  Incorrect Signal From Left Rear Wheel Sensor
(24254)  Incorrect Signal From Right Rear Wheel Sensor
53421 (33421)  Left Front Inlet Valve Inoperative
53422 (33422)  Left Front Outlet Valve Inoperative
53423 (33423)  Right Front Inlet Valve Inoperative
53424 (33424)  Right Front Outlet Valve Inoperative
53425 (33425)  Left Rear Inlet Valve Inoperative
53426 (33426)  Left Rear Outlet Valve Inoperative
53427 (33427)  Right Rear Inlet Valve Inoperative
53428 (33428)  Right Rear Outlet Valve Inoperative
(334B1) Hydraulic Fault In Left Front Outlet Valve
(334B2) Hydraulic Fault In Right Front Outlet Valve
(334B3) Hydraulic Fault In Left Rear Outlet Valve
(334B4)  Hydraulic Fault In Right Rear Outlet Valve
45721 (25721)  Travel Sensor Fault
44792 (24792)  Pump Operates Without Control Signal
E75B1 Hydraulic Fault
(1) Intermittent DTCs are in parentheses.