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5. If there are no diagnostic trouble codes present, select “Inputs/Outputs” and read the brake 6. If no other problem are found, it will be neces- sary to road test the vehicle. THE DRB MUST 7. The following conditions should be considered NORMAL operation, and no repairs should be – Brake pedal feedback during an ABS stop (clicking, vibrating) – Clicking, groaning or buzzing at 10 Km/h (6 mph) (drive off self test) – Groaning noise during an ABS stop – Slight brake pedal drop and pop noise when ignition is initially turned on – Brake pedal ratcheting down at the end of an ABS stop 8. If the complaint is ABS “cycling” at the end of a stop at low speeds, it may be caused by a 9. After a road test in which problems were found, refer to any Technical Service Bulletins that may 5.0 REQUIRED TOOLS AND DRBIII t (diagnostic read-out box) jumper wires 6.0 GLOSSARY OF TERMS ABS antilock brake system AC alternating current BCM Body Control Module CAB controller − antilock brake CCD Chrysler Collision Detection DC direct current DLC data link connector DRB diagnostic read-out box EDW electrical distribution wiring EMI electro magnetic interference HCU hydraulic control unit HZ Hertz ISO International Standards JBLK junction block JTEC Jeep and Truck Engine Controller LF left front LR left rear PCM Powertrain Control Module PDC power distribution center P/M pump motor RF right front RR right rear RFI radio frequency interference SCI Serial Communication Interface SOL Solenoid WSS Wheel Speed Sensor 7 GENERAL INFORMATION |