P1676

Read the instructions below then start the fault diagnostic procedure.

Symptom: Engine misfiring or not starting.

P1676

Fault symptoms

•	Engine misfiring or not starting.

On-Board Diagnostics

Type of diagnosis:

-	Continuous. However, it is interrupted once the fault criteria have been fulfilled and does not restart until the next driving cycle.

Enable criteria: (Conditions that must be fulfilled for diagnostics to be performed.)

-	Crankshaft rotating. Main relay voltage above 6V.

Fault criteria: (When enable criteria have been fulfilled, diagnostics will check if the fault criteria have been fulfilled.)

-	Voltage on one of the outputs below 2V when output not active or exceeding 2V when output is active. Fault criteria fulfilled after 2s.

Dependents: (Once fault criteria have been fulfilled, a number of other diagnostics must report OK before the diagnostic trouble code can finally be generated.)

-

None.

System reaction to a fault: (Once the fault criteria have been fulfilled, certain measures will sometimes be taken.)

-	Closed loop control system blocked.

OK report: (This diagnosis may be included as a dependent to another diagnosis and must therefore report OK even if it is continuous. The OK report is also used in fault handling to count down the fault counter.)

-	Enable criteria fulfilled and fault criteria not fulfilled within 60s.

Fault handling: (Refer to section “Fault diagnosis, general” for more information.)

-	Type III. Does not turn on CHECK ENGINE.

Diagnostic help

Fault diagnosis concerns an electrical fault in connecting leads or one of the valves.

Diagnostic tool functions related to this fault:

•	Activation of outputs for all valves.

Refer also to the description of activations under ”Fault diagnosis, general” for more information.

Check the wiring

Jiggle the wiring harness at several points and in different directions to check if there are intermittent breaks and short-circuits in the leads. Observe the multimeter, test lamp or diagnostic instrument during the test.