SAAB WIS ONLINE

T8 / P0033 00

Read the instructions below then start the fault diagnostic procedure.

Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general) Limp home

  P0033 00


System Bypass, charge air control, malfunction

Fault symptom

Fault indicator lamp (for further information see WIS Fault diagnosis, general)

Limp home

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Battery voltage must be between 11 - 16 V.
NONE of the following DTCs must be detected:
P0685, P0686, P0687
Engine running.
Engine speed less than 3500 rpm.
Output to solenoid valve is inactive.
The boost pressure should be more than the atmospheric pressure + 35kPa.
Intake pressure should be less than or equal to 35 kPa.
When the conditions are fulfilled, the values for boost pressure and air mass are stored for evaluation.

Fault criteria:

When the average values for boost pressure and air mass exceed 1.3 kPa and 2.4 g/s, respectively.

Dependent:

None

System reaction to a fault:

Torque limited to max. 170Nm.
Boost pressure adaption is blocked and reset.
Boost pressure control is blocked.
The system continues to function with a calculated air mass instead of the value from the mass air flow sensor.

OK report:

When the average value for boost pressure and air mass is below 0.6 kPa and 1.3 g/s, respectively.

Fault handling:

Type III
(See section Fault handling III, "Other emission-related components and functions" for more information.)

Checking the wiring harness

Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.

Diagnostic help

Diagnosis regards:

The vacuum section of the system and the function of the valve.
Tip!

The by-pass function is checked when the accelerator pedal is rapidly released during moderate acceleration.

Functions in the diagnostic tool related to the fault:

Test value:
Tachometer
Absolute pressure sensor, charge air
Manifold absolute pressure sensor
Air Mass
Atmospheric Pressure
Charge Air Bypass Valve

Activation:
Charge Air Bypass Valve

(See also description of readings/activations in diagnostic tool)