Aston Martin diagnostic trouble code
P1798: CAN TCM/CEM/DIM Circuit Malfunction
Use this reference to understand the recorded condition, confirm the available V8 Vantage or DB9 manual coverage, and follow the documented diagnostic checks before replacing parts.
- Code family
- Powertrain
- Vehicle system
- Transmission
- Manual coverage
- DB9
- Warning-lamp status
- DB9: MIL
What Aston Martin code P1798 means
CAN TCM/CEM/DIM Circuit Malfunction
DB9 preliminary diagnostic manual · section 2-284
Manufacturer fault-analysis procedure
Manual fault definition
P1798 CAN-TCM-CEM-DIM circuit malfunction.
P1799 CAN-TCM-ABS circuit malfunction.
P1799 CAN-TCM-ABS circuit malfunction.
Test sequence and decision path
1. Connect the WDS and confirm that P1798 or
P1799 is logged.
2. Analyse the problem using the High Speed CAN
Bus and Low Speed CAN BUS fault analysis procedures in the introduction section of this manual.
Open the corresponding manual page for wiring diagrams and figures
P1799 is logged.
2. Analyse the problem using the High Speed CAN
Bus and Low Speed CAN BUS fault analysis procedures in the introduction section of this manual.