PACCAR DTC 24709 is documented in Chapter 12 of the PACCAR Electrical System Service Manual, publication PM819010/KM815054, revised 04/01/2010. The page belongs to the section headed Engine Related DTCs, which covers DTC8409, DTC9109, DTC17102, DTC17131, DTC18409, DTC19009, DTC24709, DTC24809, DTC91709, DTC102809, DTC524502 and DTC524602. The two-page flow tells you whether to chase the databus or a single sensor. This excerpt runs 2 pages and starts at manual page 12-94.
What PACCAR DTC 24709 means
The reported symptom is that numerous engine related components are inoperative. The ICU/CECU takes many of its inputs from V-CAN (J1939) datalink communications, and PACCAR DTC 24709 is stored when an Engine Control Module databused message is not received. The fault therefore points at the message path, not necessarily at the component whose reading has gone blank.
Document details and coverage
| Brand | PACCAR |
|---|---|
| Model coverage | PACCAR cab instrumentation with ICU/CECU, 2005-2010 |
| System / group | Chapter 12 Electrical System – DTCs, Cab (2005-2010) |
| Publication no. | PM819010/KM815054 |
| Revision | 04/01/2010 |
| Pages | 2 |
| File size | 0.1 MB |
| Format / language | PDF, English |
Procedure sections in this excerpt
- Symptom statement and how the ICU/CECU receives its engine data
- Step 1 – turn the ignition key ON, start ESA and select “Connect” to reach the vehicle
- Step 2 – select “Diagnose” to read Engine Control Module diagnostic trouble codes
- Branch A – many Engine Control Module message codes logged at the same time
- Branch B – only a single or a few engine related codes present
- Cross-reference to the J1939 Lite Diagnostic Procedure
Wiring and pin references
The decision rule is simple and it is the whole point of the page. If numerous Engine Control Module message codes are present and were set at the same time, the manual treats that as a J1939 communication failure between the Engine Control Module and the CECU and sends you to the J1939 Lite Diagnostic Procedure. If only one or a few engine related codes are present, the manual reasons that a communication loss would have logged more codes, so the fault is more likely an individual sensor or a sensor-to-ECM problem, and it refers you to the OEM engine service information.
Who needs this PACCAR DTC 24709 manual
Truck electricians and fleet workshops that already run the Electronic Service Analyst and need to decide, in one step, whether to open up the databus or to go straight to the engine side. Confirm coverage against the official PACCAR corporate site before ordering parts.
The full PDF is free to read in the DiagTechPro manuals library, where an account is needed to download it.
Related manuals library
