Paccar

PACCAR MX (2004 Emissions) Fault Code: U179D CAN Communication – Message (TSC1 xxe) Data Error SET CONDITIONS:This DTC is set if a fault is detected in the Torque Speed Control message coming from the Adaptive Cruise Control. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC will change to inactive immediately 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, repair successful– Yes, repair unsuccessful POSSIBLE CAUSES:1. External interference of...

PACCAR MX (2004 Emissions) Fault Code: U179E CAN – Message (TSC1 xxe) Time-Out 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: U17A0 Accelerator Pedal 1 Frequency – Data Valid but Too Low on ECU (D420) Pin (B41) SET CONDITIONS:The PCI ECU (D420) detects that the frequency of accelerator pedal position sensor 1 is less than 180 Hz. DIAGNOSTIC CONDITION:This diagnostic runs continuously when the ignition is on. CORRESPONDING OBD READINESS MONITOR:None RESET CONDITION:This DTC changes to inactive when the fault is no longer detected. To validate the repair, monitor the accelerator pedal sensors with the diagnostic service tool. REPAIR VERIFICATION:1. Clear all DTCs.2. Test drive or operate the vehicle to meet the diagnostic conditions and...

PACCAR MX (2004 Emissions) Fault Code: U17A1 Accelerator Pedal 2 – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (B45) SET CONDITIONS:This DTC is set when the ECU detects a higher voltage than expected on the signal or control circuit of the ECU. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on. 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, repair...

PACCAR MX (2004 Emissions) Fault Code: U17A2 Accelerator Pedal 2 – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (B45) SET CONDITIONS:This DTC is set when the ECU detects a lower voltage than expected on the signal or control circuit of the ECU. DIAGNOSTIC CONDITION:The diagnostic runs continuously when the ignition is keyed on. 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, repair...