When Monitored and Set Condition
- When Monitored: With the engine running and no fault in the throttle valve actuator.
- Set Condition: The Mass Air Flow (MAF) Sensor value is less than 16 kg/h when the throttle valve angle is greater than 14° for approximately 5 seconds, or the MAF Sensor reading is greater than a calculated value that is determined by engine speed and throttle valve angle for approximately 5 seconds.
| Possible Causes |
|---|
| FUSED ENGINE CONTROL RELAY OUTPUT CIRCUIT OPEN |
| FUSED ENGINE CONTROL RELAY OUTPUT CIRCUIT SHORT TO GROUND |
| SENSOR GROUND CIRCUIT OPEN |
| MASS AIR FLOW SENSOR SIGNAL CIRCUIT OPEN |
| MASS AIR FLOW SENSOR SIGNAL CIRCUIT SHORT TO GROUND |
| 5-VOLT SUPPLY CIRCUIT OPEN |
| 5-VOLT SUPPLY CIRCUIT SHORT TO GROUND |
| MASS AIR FLOW SENSOR |
| POWERTRAIN CONTROL MODULE |
For a complete Powertrain Control Module Circuit Diagram, (Refer to ENGINE - SCHEMATICS AND DIAGRAMS) .