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G (Acceleration) Switch: The CAB monitors the acceleration switch at all times. The switch Brake Warning Indicator Switch: The brake warning indicator switch is a fluid level sending t. 3.2 ABS DIAGNOSTIC TROUBLE CODES The Teves Mark 20 Antilock Brake System (ABS) module may report any of the following diagnostic • Brake Fluid Level Switch Circuit • CAB Power Feed Circuit • Cluster Fault • Controller Failure • G Switch Not Processable • Left Front Sensor Circuit Failure • Left Front Sensor Signal Failure • Left Rear Sensor Circuit Failure • Left Rear Sensor Signal Failure • PCI Bus Communication • Pump Motor Circuit Not Working Properly • Right Front Sensor Circuit Failure • Right Front Sensor Signal Failure • Right Rear Sensor Circuit Failure • Right Rear Sensor Signal Failure • System Overvoltage • System Undervoltage Diagnostic trouble codes are retained in memory until erased using the DRB, or automatically erased 3.2.1 SYSTEM INITIALIZATION System initialization starts when the key is turned to ‘‘run’’. At this point, the CAB performs a complete self-check of all electrical components in At 20 km/h (12 mph) a dynamic test may be performed. If the brake lamp switch is activated the If any component causes a diagnostic trouble code during system initialization or dynamic check, the 3.2.2 DIAGNOSTIC MODE For a Mark 20 system to enter a diagnostic mode, vehicle speed must be below 10 km/h (6 mph) and t. The following are characteristics of diagnostic mode: • The amber ABS warning indicator will blink 1 ⁄ 2 second on and 1 ⁄ 2 second off). If a hard trouble code is present, such as a CAB • Antilock operation is disabled. 3.2.3 INTERMITTENT DIAGNOSTIC If the malfunction is not present while perform- ing a test procedure, the diagnostic procedures will • loose or corroded conditions • damaged components (sensors, tone wheels) • damaged wiring • excessive axle shaft runout • hydraulic system leaks • regular brake system problems, non-ABS related If no obvious problems are found, erase diagnostic trouble codes and with the key on, wiggle the wire 3.3 USING THE DRBIII T Refer to the DRBIII t user’s guide for instructions and assistance with reading diagnostic trouble t functions. 4 GENERAL INFORMATION |