Saab 9000 - Page 128

Fault diagnosis 125
Diagnostic trouble code P01.35 (contd.)
1
[[ ~ P0135, P0141 I
ODDO
ODDO
DODO
ODDO
□□ CJ
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 P0135 and P0141 present?
I YES I Continue with point 2.
I NO I Continue with point 3.
2
~.
~ >5min
1.8-4.0Q
2 Check the oxygen sensors' heating circuit re-
sistance
The engine should have been switched off for at least
5 minutes.
- Check fuse 28 and change it if necessary.
- Unplug the 4-pin connectors of both oxygen
sensors.
- Check the resistance of both sensors:
pins 1-2 ________ 1.8-4.0 ohms
Are the resistance readings OK?
I YES I Repair or replace the leads between pin 1 of
the connectors of both oxygen sensors and
fuse 28. Then continue with point 4.
I NO I Change the · relevant oxygen sensor and
proceed to point 4.
Saab 9000
I