Saab 9000 - Page 125

122 Fault diagnosis
Diagnostic trouble codes·Po130, P0132, P0133 (co~td.)
0000
0000
0000
0000
OOc:::J
3 Check the oxygen sensor's electrical inter-
faces
- Unplug the oxygen sensor's 4-pinconnector.
- Replace the sensor with a conventional 1.5 V
battery in good condition.
- Connect the battery's positive (
+) pole to pin 4
of the connector.
- Connect the battery's - positive (
+) pole to
pin 3 of the connector.
- Ignition switch in ON position.
- Connect an ISAT scan tool.
- Select "READ FUNCTIONS".
- Select "O2S 1 ".
Does the ISAT scan tool show about "1.4 V"?
I YESI Change the oxygen sensor and. continue
with point 4;·
INo I Check the leads between:
. pin 4 of the connector and pin 23 of the cont-
rol module and between
pin 3 of the connector and pin 47 of the cont-
rol module for continuity or shorting and re-
pair or replace them as necessary.
Then continue with point 4.
Saab 9000
1.5V
=1.4V