How 'bout this.....

DTC 1-2-2 OUTSIDE TEMP. SENSOR CIRCUIT OPEN OR SHORTED TO POWER

1) Ensure DTCs 1-2-2, 1-2-4, 1-2-6, 2-1-1, 2-2-1, 2-3-1, 2-3-
3 or 2-3-5 are not present at the same time. If any of these codes are
present at the same time, check for an open circuit in the common
ground wire. If only DTC 1-2-2 is present, go to next step.

2) Turn ignition off. Install test unit and adapter between
ECC control module and harness connector. Using ohmmeter, connect test
leads between ground and test unit pins No. 6, 9, 10 and 56. Ohmmeter
should read zero ohms in each terminal. If resistance is as specified,
go to next step. If resistance is not as specified, check for open
circuit.

3) Turn ignition on. Connect voltmeter between test unit pins
No. 10 and 14. Check voltage to outside temperature sensor. Voltage
should be about 2.6 volts at 68  F (20  C). If voltage reading is 5
volts, check for open in circuit or in outside temperature sensor. If
voltage reading is 12 volts, check for open in circuit between sensor
harness terminal No. 1 and ECC control module.

4) Turn ignition off. Disconnect Adapter (981 3194) from ECC
control module. Disconnect outside temperature sensor connector
(located on right rear of engine compartment). See Figs. 4 and 5.
Install jumper wire between sensor harness terminals. Connect ohmmeter
between test unit pins No. 10 and 14. If ohmmeter reads zero ohms,
wire is okay. Check for faulty sensor. If ohmmeter reads infinity,
sensor is okay. Check for open circuit.

Hope this helps......


Mike