Paccar

PACCAR MX (2004 Emissions) Fault Code: U1073 Humidity Sensor – CAN, Message Time-Out SET CONDITIONS:The PCI ECU (D420) lost communication with the humidity sensor (F852). DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive after the ignition is keyed off for at least 15 seconds and keyed on again, and the fault is no longer detected. REPAIR VERIFICATION:1. Clear all DTCs.2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.3. Did the DTC come back?– No, repair successful– Yes, repair unsuccessful POSSIBLE CAUSES:1. E-CAN...

PACCAR MX (2004 Emissions) Fault Code: U1074 Inlet Air Temperature Before Compressor – Data Erratic, Intermittent or Incorrect SET CONDITIONS:The PCI ECU (D420) receives a CAN message from the humidity sensor (F852) that contains an out-of-range value for the temperature. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive after the ignition is keyed off for at least 15 seconds and keyed on again, and the fault is no longer detected. REPAIR VERIFICATION:1. Clear all DTCs.2. Test drive or operate the vehicle to meet the diagnostic conditions and set...

PACCAR MX (2004 Emissions) Fault Code: U1104 CAN – Message (ACC1) Time-Out from Advanced Emergency Braking System SET CONDITIONS:This DTC is set when the repetition rate of the received CAN message is lower than expected or when the message is not received at all. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on or when the engine is running. RESET CONDITION:The DTC changes to inactive after the diagnostic runs and passes. POSSIBLE CAUSES:1. Wiring issues (interruption or contact resistance)2. Defective components3. Incorrect software configuration

PACCAR MX (2004 Emissions) Fault Code: U1105 CAN Communication – Message (PROBA_BBM_to_Eng) Out of Range, Engine Stop from Body Builder Module SET CONDITIONS:This DTC is set when a CAN message is received correctly, but the content (signal value or status) is out of the expected range. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on or when the engine is running. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:The DTC changes to inactive after the diagnostic runs and passes. REPAIR VERIFICATION:1. Clear all DTCs.2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.3. Did the...

PACCAR MX (2004 Emissions) Fault Code: U1110 CAN – Message (RC_DR) Time-Out from Retarder System SET CONDITIONS:This DTC is set when the repetition rate of the received CAN message is lower than expected or when the message is not received at all. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on or when the engine is running. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:The DTC changes to inactive after the diagnostic runs and passes. REPAIR VERIFICATION:1. Clear all DTCs.2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.3. Did the DTC come back?– No,...