B1746

Outside temperature sensor, open/short circuit.

Action
1 Connect the ISAT scan tool and read "OUTSIDE TEMP SENS".
Check that the temperature values correspond to ambient air temperature.
2 Check that the temperature display on the Electronic Display Unit (EDU) is working. If not, carry out fault diagnosis on the EDU.
3 Remove the Automatic Climate Control (ACC) control module. Connect a BOB and measure the voltage between pin 18 and pin 1 with the ignition on. The voltage should be about 7 - 13 volts (fluctuating). If the value is correct, proceed "Action Before Changing A Control Module". Before Changing a Control Module
4 Check the lead between pin 18 on the ACC control module and pin 23 on the EDU control module for open/short circuits to ground.
5 Change the EDU control module.