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PACCAR MX (2004 Emissions) Fault Code: U1788 CAN Communication – Message (PROPB_EST) Not Available, Coolant Temperature from Retarder System

PACCAR MX (2004 Emissions) Fault Code: U1788 CAN Communication – Message (PROPB_EST) Not Available, Coolant Temperature from Retarder System

SET CONDITIONS:
This DTC is set when a CAN message is received correctly, but the content (signal value or status) is not available.

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 successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
A malfunction in the system from which the message originates

PACCAR MX (2004 Emissions) Fault Code: U1787 CAN Communication – Message (PROPB_EST) Out of Range, Coolant Temperature from Retarder System
PACCAR MX (2004 Emissions) Fault Code: U1785 CAN – Message (PROPB_EST) Time-Out from Retarder System
PACCAR MX (2004 Emissions) Fault Code: U1781 CAN – Message (TSC_PE) Time-Out
PACCAR MX (2004 Emissions) Fault Code: U1780 CAN – Message (TSC1 yye) Time-Out
PACCAR MX (2004 Emissions) Fault Code: U1730 CAN Communication – Message (AT1OG1) Out of Range, NOx after SCR from Aftertreatment System
PACCAR MX (2004 Emissions) Fault Code: U1728 CAN – Message (AT1OG1) Time-Out from Aftertreatment System