Paccar

PACCAR MX (2004 Emissions) Fault Code: U177B Accelerator Pedal 1 – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (B41) 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: U177C Accelerator Pedal 1 – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (B41) 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...

PACCAR MX (2004 Emissions) Fault Code: U177D Accelerator Pedal Sensor 1 Duty Cycle – Data Valid but Too High on ECU (D420) Pin (B41) SET CONDITIONS:The PCI ECU (D420) detects that the duty cycle of accelerator pedal position sensor 1 is higher than expected. 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...

PACCAR MX (2004 Emissions) Fault Code: U177E Accelerator Pedal Sensor 1 Duty Cycle – Data Valid but Too Low on ECU (D420) Pin (B41) SET CONDITIONS:The PCI ECU (D420) detects that the duty cycle of accelerator pedal position sensor 1 is lower than expected. 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...

PACCAR MX (2004 Emissions) Fault Code: U177F Accelerator Pedal 1 Frequency – Data Valid but Too High on ECU (D420) Pin (B41) SET CONDITIONS:The PCI ECU (D420) detects that the frequency of accelerator pedal position sensor 1 is more than 220 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...