Possible Causes
| Possible Causes |
|---|
| INTERMITTENT DTC |
| (G31) AAT SIGNAL CIRCUIT SHORTED TO GROUND |
| (G31) AAT SIGNAL CIRCUIT SHORTED TO (G931) SENSOR GROUND |
| (G31) AAT SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE |
| AMBIENT AIR TEMPERATURE SENSOR |
| FRONT CONTROL MODULE (FCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to *PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .