Driver/Vehicle Information Display

Fault symptom
The Saab Information Display (SID) unit shows -°C

Diagnostic procedure
1 Connect a Intellegent Saab Tester (ISAT) Scan Tool, select the "SAAB INFO DISPLAY" menu followed by READ VALUES" and "OUTDOOR TEMPERATURE".
2 If there is nothing wrong with the outside temperature information, the temperature shown on the ISAT Scan Tool display should be the same as the outside temperature.
3 If the ISAT Scan Tool display shows -35°C (-25°F), there is an open circuit between pins 18 and 19.
If the ISAT Scan Tool display shows +50°C (122°F), there is a short circuit between pins 18 and 19.
4 Unplug the outside temperature sensor and inspect the connector for poor contact and corrosion.
Take a voltage reading across the connector pins. The correct reading should be 4.5 - 5 V.
If the voltage reading is not OK, continue with point 7.
5 If the voltage reading is OK, measure the resistance directly across the sensor. Compare the resistance reading with the table.

K ohms Kohms
(minimum) (maximum)
±0 5.8 6.2
±10°C 3.8 4.1
±20°C 2.5 2.8
±30°C 1.7 1.9







6 If the resistance is not OK, change the sensor.
7 The fault is probably of intermittent nature.
Connect the female connector to the sensor and clear the trouble code.

If the trouble code recurs, continue as described in "Before Changing a Control Module".
8 Check the wiring by connecting a BOB to the SID unit connector (SID unit disconnected).
9 Check for continuity/shorting between pins 18 and 2 of the connector and also between pins 19 and 1. Locate the short circuit or break in the wiring and take the necessary remedial action.