Trip Computer

NO OUTSIDE TEMPERATURE

Fault Symptom

- The SID unit shows --°C

Diagnostic Procedure

1 Connect a 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 - 5v.

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.

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 Checking the Basics. Checking the Basics

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.