B1343

Solar sensor, open circuit/short circuit.

Action
1 Connect the ISAT and read the "SOLAR SENSOR VALUE".
The value can vary between 0 - 1390W/sq.m Illuminate the solar sensor with a lamp and check that the value increases.
(A 60 W lamp gives approx. 600-1200 W/sq.m.) The solar sensor primarily measures infrared radiation which means that a fluorescent tube cannot be used.
2 Unplug the solar sensor connector and measure the voltage supply in the connector.
- The voltage between pins 1 and 4 should be about 12 volts.
- The voltage between pins 1 and 2 should be about 6.5 volts.
If the value is incorrect, proceed to point 4.
3 Change the solar sensor.
4 Unplug the Automatic Climate Control (ACC) control module connector. Connect a BOB between the following pins and check the leads for open/short circuits to ground:
- The lead between pin 35 on the ACC control module connector and pin 4 on the solar sensor connector.
- The lead between pin 6 on the ACC control module connector and pin 2 on the solar sensor connector.
- The lead between pin 5 on the ACC control module connector and pin 1 on the solar sensor connector.
5 If the fault remains, proceed to "Action Before Changing A Control Module". Before Changing a Control Module