B1353

Cabin temperature sensor, open/short circuit to BPV.

Conditions
Cabin temperature sensor, open/short circuit to BPV.

Action
1 Connect the ISAT scan tool and read "INDOOR TEMP.SENSOR".
The values are displayed in Celsius and Fahrenheit.
The temperature readings should correspond to the ambient air temperature.

2 Unplug the cabin temperature sensor connector and check the voltage between pins 2 and 3 in the connector.
The voltage should be between about 10 and 11 volts.
If the value is incorrect, proceed to point 4.
3 Measure the resistance directly across the cabin temperature sensor. The resistance should vary with temperature according to the adjacent table.
Change the cabin temperature sensor if the data is incorrect. Erase the diagnostic trouble codes and check that the codes are not regenerated.

°C (°F) Min. (k Ohms) Max. (k Ohms)
0 (32) 30.0 34.9
+10 (50) 18.5 21.1
+20 (68) 11.8 13.2
+25 (77) 9.5 10.5
+30 (86) 7.6 8.5
+40 (104) 5.0 5.7







4 Unplug the Automatic Climate Control (ACC) control module connector. Connect a BOB to the wiring harness and check the leads for open/short circuits as follows:
- Between pin 15 on the ACC control module connector and pin 2 on the sensor connector.
- Between pin 33 on the ACC control module connector and pin 3 on the sensor connector.
5 Proceed to "Action Before Changing A Control Module". Before Changing a Control Module