P1493

Test 1 - 3:

Test 4 - 5:

SYMPTOM
P1493-AMBIENT/BATT TEMP SEN VOLTS TOO LOW

WHEN MONITORED
The ignition key on.

SET CONDITION
Ambient Temperature Sensor is less than 0.098 volt at the PCM for 5 seconds.

POSSIBLE CAUSES
- (K25) AAT sensor voltage below 0.3 volts
- Ambient temperature sensor internal failure
- (K25) AAT sensor signal shorted to ground
- (K25) AAT sensor signal shorted to (K4) sensor ground circuit
- PCM terminal condition
- PCM