Information

P1444

Canister Close Valve Circuit. Open/Short to Ground.







Fault symptoms
- CHECK ENGINE.

On-Board Diagnostics
Type of diagnosis:
- Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria
- General condition for this diagnostic trouble code: Atmospheric pressure must exceed 72 kPa as well as coolant and intake air temperature must exceed -7 °C.
- Engine running. Main relay voltage exceeding 10 V. Output not active.

Fault criteria
- Voltage below 2 V for 1 s.

Dependents
- None

System reaction to a fault
- Fuel adaptation and purging are blocked.

OK report
- Enable criteria fulfilled. Fault criteria not fulfilled within 60 s.

Fault handling: For more information, refer to "Fault handling III, other emission related components and function" at Testing and Inspection for Trionic T7. Computers and Control Systems

Diagnostic help
Fault diagnosis concerns an electrical fault in the connecting leads or in the valve.

Functions in the diagnostic tool related to the fault:
- Activate valve output.

For more information, see Menu "Activate".

Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.