MAF/Map - TP Rationality Test
The MAF or MAP and TP sensors are cross-checked to determine whether the sensor readings are rational and appropriate for the current operating conditions. (P0068) The test uses the calculated load value (LOAD) which can be computed from MAF for a mass air flow system or from MAP for a speed density system.
MAF/TP RATIONALITY CHECK OPERATION
| DTCs | P0068 - MAP / MAF - Throttle Position Correlation |
| Monitor Execution | Continuous |
| Monitor Sequence | None |
| Sensors OK | |
| Monitoring Duration | 3 seconds within test entry conditions |
TYPICAL MAF/TP RATIONALITY CHECK ENTRY CONDITIONS
| Entry Condition | Minimum | Maximum |
| Engine RPM | 550 rpm | min of 5000 rpm |
| Engine Coolant Temp | 150 °F |
TYPICAL MAF/TP RATIONALITY CHECK MALFUNCTION THRESHOLDS
| Load > 60% and TP < 2.4 volts or Load < 30% and TP > 2.4 volts |