P0070

Test 1 - 4:

Test 5 - 7:

Test 8:

SYMPTOM
P0070-AMBIENT TEMP SENSOR STUCK

WHEN MONITORED
Engine Running.

SET CONDITION
After 4 warm-up cycles, the PCM did not see a 2° C (35° F) change in the Ambient Temperature Sensor voltage within 200 miles Two Trip Fault

POSSIBLE CAUSES
- Good trip equal to zero
- (k25) AAT signal circuit shorted to battery voltage
- Ambient Air temperature sensor voltage below 1.0 Volt
- (K25) AAT signal circuit open
- (k4) sensor ground circuit open
- (k25) AAT signal circuit shorted to ground
- (k25) AAT signal circuit shorted to (K4) sensor ground
- PCM low
- PCM high