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P1658

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE. Possible noise when accelerator released.

P1658


Charge Air Bypass Valve Circuit. Open / Short to Ground.


Fault symptoms


• CHECK ENGINE.

• Possible noise when accelerator released.


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.)


- Engine running. Main relay voltage exceeding 10V. Output not active.


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


- Voltage on the output below 2V for more than 1s.


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.)


- None.


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.)


- As for P1110: Enable criteria fulfilled and amplitude below 1 kPa. The criteria must be fulfilled on three consecutive occasions during the same driving cycle.


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


- Type III.


Diagnostic help

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

Diagnostic tool functions related to this fault:


• Activation of the output for the valve.


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.