Paccar

PACCAR MX (2004 Emissions) Fault Code: P0541 Grid Heater – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (C72) or Pin (C49) 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?–...

PACCAR MX (2004 Emissions) Fault Code: P0542 Grid Heater – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (C72) or Pin (C49) 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?–...

PACCAR MX (2004 Emissions) Fault Code: P0543 Grid Heater – Current Too Low or Open Circuit on ECU (D420) Pin (C72) or Pin (C49) SET CONDITIONS:This DTC is set when the PCI ECU (D420) detects a too low current on the control circuit of the grid heater relay (G014). DIAGNOSTIC CONDITION:This diagnostic runs continuously after the ignition is switched 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?–...

PACCAR MX (2004 Emissions) Fault Code: P0562 PCI ECU Power Supply – Data Valid but Too Low on ECU (D420) Pin (B60) or Pin (B61) or Pin (B62) SET CONDITIONS:The ECU power supply voltage is too low. 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. 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:Check the power supply level...

PACCAR MX (2004 Emissions) Fault Code: P0563 PCI ECU Power Supply – Data Valid but Too High on ECU (D420) Pin (B60) or Pin (B61) or Pin (B62) SET CONDITIONS:The ECU power supply voltage is too high. 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. 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:Check the power supply level....