Saab 9000 - Page 124

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Fault diagnosis 121
Diagnostic trouble codes P0130, P0132, P0133 (contd.)
1
[[
~
P0135, P0141
I
DODD
DODD
DODD
DODD
O
□
c=J
Diagnostic procedure
1 Check additional diagnostic trouble codes in
the Trionic system
- Obtain readouts of all diagnostic trouble codes
using the ISAT scan tool.
Are P0132 and P0138 present?
I
YES
I
Continue with point 2.
I
NO
I
Continue with point 3.
2
~
OL
2 One of the oxygen sensor leads connected to
electronic control module pin 23, 70 or 47 is
short-circuited to battery positive (B+) in the
wiring harness or in one of the oxygen sen-
sors.
Check the insulation of the oxygen sensors.
- Unplug the 4-pin connectors of both oxygen
sensors.
- Check the resistance of both sensors
• pins 1-3 ________ OL
(Overload= infinite resistance)
• pins
1-4
_________ OL
(Over~oad
=
infinite resistance)
Are all readings OK?
I
YES
I
Rectify the lead between the connectors of
both sensors and pin 23,
70
or
47
of the
electronic control module and then proceed
to point 4.
I
NO
I
Change the relevant oxygen sensor and
proceed to point 4.
.
Saab 9000
I