Operation Section Table 2. Diagnostic Fault Codes (Flash Codes) cont’d. (*) Fault actions shown are default values specified by the OEM. 74 DFC PROBABLE FAULT FAULT ACTION * CORRECTIVE ACTION FIRST CHECK 551 (55) SensVoltRangeLow Sensor reference voltage XDRP too low (1) TurnOnMil (2) EngineShutdown Measure transducer power at the TMAP connector with a multimeter TMAP Pin 3 XDRP +5 Vdc to TMAP Pin 1 XDRG GND Verify transducer power at the SECM with a multimeter SECM Pin B24 +5 Vdc to SECM Pin B1 XDRG GND Verify transducer power at ETC with a multimeter ETC Pin 3 XDRP PWR to ETC Pin 2 XDRG GND Verify transducer power to the foot pedal with a multimeter.
561 (56) SensVoltRangeHigh Sensor reference voltage XDRP too high (1) TurnOnMil (2) EngineShutdown Measure transducer power at the TMAP connector with a multimeter TMAP Pin 3 XDRP +5 Vdc to TMAP Pin 1 XDRG GND Verify transducer power at the SECM with a multimeter SECM Pin B24 +5 Vdc to SECM Pin B1 XDRG GND Verify transducer power at ETC with a multimeter ETC Pin 3 XDRP PWR to ETC Pin 2 XDRG GND Verify transducer power to the foot pedal with a multimeter.
571 (57) HardOverspeed Engine speed has exceeded the third level (3 of 3) of overspeed protection (1) TurnOnMil (2) HardRevLimit Usually associated with additional ETC faults • Check for ETC Sticking or other ETC faults Verify if the lift truck was motored down a steep grade 572 MediumOverspeed Engine speed has exceeded the second level (2 of 3) of overspeed protection (1) TurnOnMil (2) MediumRevLimit Usually associated with additional ETC faults • Check for ETC Sticking or other ETC faults Verify if the lift truck was motored down a steep grade 573 SoftOverspeed Engine speed has exceeded the first level (1 of 3) of overspeed protection (1) TurnOnMil (2) SoftRevLimit Usually associated with additional ETC faults • Check for ETC Sticking or other ETC faults Verify if the lift truck was motored down a steep grade 611 (61) APP1RangeLow APP1 sensor voltage out of range low, normally set if the APP1 signal has shorted to ground, circuit has opened or sensor has failed (1) TurnOnMil (2) CheckEngineLight Check foot pedal connector • Check APP1 signal at SECM PIN B7