1990 Jeep Wagoneer Service and Repair Manual

VEHICLE DESCRIPTION: VEHICLES EQUIPPED WITH ANTILOCK BRAKE SYSTEM (ABS). THE ANTILOCK BRAKE SYSTEM (ABS) HYDRAULIC CONTROL UNIT CAN EXPERIENCE EXCESSIVE BRAKE ACTUATOR PISTON SEAL WEAR WHICH COULD

IF THIS OCCURS, THE ABS FUNCTION WOULD BE LOSE AND REDUCED POWER ASSIST WOULD BE EXPERIENCED DURING

DEALERS WILL TEST THE VEHICLE'S ABS AND REPAIR AS NECESSARY. THE WARRANTY ON ALL ABS COMPONENTS WIL

IMPROPER INSERTION/CRIMPING OF THE HOSE-TO-END FITTINGS OF THE HIGH PRESSURE HOSE ON THE ANTI-LOCK BRAKE SYSTEM CAN CAUSE DETACHMENT OF THE HOSE FROM THE ABS SYSTEM, AND DISCHARGE OF HYDRAULIC FLUID.

DETACHMENT OF THE HOSE FROM THE ABS SYSTEM CAUSES THELOSS OF THE ABS FUNCTION AND HYDRAULIC BRAKE AS

REPLACE THE ABS HIGH PRESSURE HOSE.

VEHICLE DESCRIPTION: PASSENGER AND MULTI-PURPOSE VEHICLES ORIGINALLY SOLD OR CURRENTLY REGISTERED IN THE STATES OF CONNECTICUT, ILLINOIS, INDIANA, MAINE, MARYLAND, MASSACHUSETTS, MICHIGAN, NEW HAMP

THE REDUCED STRENGTH CAN ALLOW THE CAST IRON WEAR SURFACE TO SEPARATE FROM THE HUB, REDUCING THE BRA

DEALERS WILL REPLACE THESE ROTORS WITH ROTORS THAT ARE COATED WITH A CORROSION PROTECTION.

THERE MAY BE HYDRAULIC FLUID CONTAMINATION FROM CONDENSATION FORMATION THAT CAN PLUG THE ABS BRAKE BOOSTER PUMP FILTER; STRESS CORROSION OF THE MASTER CYLINDER SNAP RING HAS BEEN TRACED TO CHLORINE LE

CONTAMINATION OF THE HYDRAULIC FLUID CAN CAUSEMALFUNCTIONING OF THE ANTI-LOCK BRAKE SYSTEM; LOW PRES

REPLACE ABS LOW PRESSURE HOSE; REBUILD MASTER BRAKE CYLINDER; INSPECT, SERVICE INTERFERENCE PROBLEMS

MALFUNCTION OF FUEL INJECTION SYSTEM THROTTLE POSTITION SENSOR COULD CAUSE INTERMITTENT HIGH ENGINE IDLE SPEED IMMEDIATELY AFTER STARTING ENGINE.

HIGH ENGINE IDLE WHEN CAR IS FIRST PLACED IN GEAR COULDRESULT IN UNEXPECTED ACCELERATION.

REPLACE THROTTLE POSITION SENSORS WITH SENSORS THAT WOULD SEND CORRECT SIGNALS TO THE FUEL INJECTION