Monitor Description
The ECM performs idle speed control (ISC) by monitoring the idle speed and airflow at idle. When the difference between the target engine idle speed and actual engine idle speed exceeds the threshold value for 30 seconds or more, the ECM judges it as an ISC system failure.
MONITOR STRATEGY
| Related DTCs | P0506: Idle speed control (ISC) functional check P0507: Idle speed control (ISC) functional check |
| Required Sensors/Components (Main) | Electronic throttle control system |
| Required Sensors/Components (Related) | Crankshaft position sensor E.F.I. water temperature sensor Vehicle speed sensor |
| Frequency of Operation | Continuous |
| Duration | 30 seconds |
| MIL Operation | 2 operation cycle |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
| Overlap prohibited DTC | P0030, P0031, P0032 (air/fuel ratio sensor - heater) P0068, P0107, P0108 (Vacuum (MAP) sensor) P0117, P0118, P0125 (Engine Coolant Temperature (ECT) sensor) P0122, P0123, P0222, P0223 (Throttle position sensor) P0131, P0132 (air/fuel ratio sensor - ECM input voltage) P0134, P2195, P2196 (Air/fuel ratio sensor - Output voltage) P0300, P0301, P0302, P0303, P0304 (misfire) P0461, P0462, P0463 (Fuel Level sensor (FL)) P0500 (Vehicle Speed Sensor (VSS)) P0604, P0605 (ECM ROM) P0851, P0852 (neutral position switch) P1160 (throttle return spring) P2101, P2102 (Throttle actuator control motor) P2109 (Throttle position sensor minimum stop) P2119 (Throttle actuator control) P2122, P2123, P2127, P2128 (Accelerator Pedal Position Sensor (APPS) circuit) P2135 (Throttle position sensor (TPS) degree of correlation) P2138 (Accelerator pedal position sensor (APPS) degree of correlation) |
| Fuel Level | 15% or more |
| Atmospheric pressure | 75.06 kPa {563 mmHg} or more |
| Battery Voltage | 10.9V or more |
| Engine coolant temperature | 60°C {140°F} or more |
| Elapsed time after starting the engine | 10.49 seconds or more |
| Closed control of | ISC Control in progress |
| λ | 0.81 to 1.1 |
| Elapsed time after turning the A/C switch OFF ↔ON | More than 5.1 seconds |
| Elapsed time after fluctuation of intake manifold pressure =< 4 kPa {30 mmHg} | More than 5.1 seconds |
| Vehicle speed | 0 km/h {0 MPH} |
| Elapsed time after turning the neutral switch OFF ↔ON | More than 5.1 seconds |