Monitor Description
OUTLINE OF DIAGNOSIS
Detect output characteristics malfunction of the pressure sensor in the canister pump module.
Judge as NG when the pressure sensor output value in the canister pump module is largely different from the intake manifold pressure when the ignition switch is ON.
COMPONENT DESCRIPTION
| *1 | Canister pump module | *2 | Switching valve |
| *3 | Reference orifice (0.02 inch orifice) | *4 | Pressure sensor |
| *5 | Vacuum pump | *6 | Drain filter |
| *7 | Purge valve | *8 | Intake manifold |
| *9 | Fuel tank assembly | *10 | Charcoal canister assembly |
EXECUTION CONDITION
| Secondary parameters | Execution condition |
|---|---|
| Elapsed time after ignition switch is turned to ON | 500 ms or more and Less than 60000 ms |
| Soaking time | 60 s or more |
| Vacuum pump in the canister pump module | Not in operation |
| Switching valve in the canister pump module | Open |
| Purge control | Not in operation |
GENERAL DRIVING CYCLE
Perform the diagnosis only once at ignition switch ON.
DIAGNOSTIC METHOD
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgment value
| Malfunction Criteria | Threshold Value |
|---|---|
| Pressure sensor output value in canister pump module - Intake manifold pressure (absolute pressure) when ignition switch is ON | -5.9 kPa (-44.6 mmHg, -1.8 inHg) or less, or 5.9 kPa (44.6 mmHg, 1.8 inHg) or more |
Time needed for diagnosis
320 ms
Malfunction indicator light illumination
Illuminates when malfunction occurs in 2 continuous driving cycles.