Saab 9000 - Page 103

100 Fault diagnosis
Diagnostic trouble codes ·P0105, P0106, P0107, P0108
Manifold absolute pressure sensor
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Symptom of fault
The CHECK ENGINE lamp {MIL) is on.
Impaired driveability.
Basic boost pressure only.
Possible existence of other DTCs (misfiring, closed
loog., boost
pressure control).
T~A/C
compressor
does not work.
Conditions
P0105: All-embracing DTC.
P0106: <50 kPa or> 140 kPa when the ignition switch
is turned to the ON position or when the engine is run-
ning and the pressure is constant for 60 seconds de-
spite throttle position changes.
P0107: Ignition switch in the ON position:
<10 kPa for 2 seconds at wide throttle opening.
P0108: Ignition switch in the ON position:
>245 kPa for 2 seconds at slight throttle opening.
589
2243
67
Diagnostic help
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The pressure sensor reading can be obtained on an
ISAT scan tool.
Turn the ignition switch to the ON position and then
back to the OFF position.
- Connect an ISAT scan tool.
- Select "READ FUNCTIONS".
- Select "INTAKE PRESSURE".
The reading obtained on the ISAT scan tool should
be about 102 kPa.
(NOTE: the reading obtained is dependent on the in-
take air pressure).
- Engine running at idling speed.
If the pressure sensor is in perfect working order the
reading obtained on the ISAT scan tool should be
40-60 kPa.
Saab 9000