Mode D (Clogging of pipe diagnosis and leak pressure measurement)
WARNING: This page is about a different variant/trim than selected.
- Clogging of pipe
Purpose: Measure the time required for the evaporative emission system to reach the target negative pressure by the vacuum pump, and detect the clogging of pipe trouble.
Judge as clogging of pipe malfunction if the evaporative emission system reaches to the target negative pressure within the specified time.
- Leak pressure measurement
Purpose: Measure the pressure (leak pressure) when the evaporative emission system becomes the negative pressure by the vacuum pump.
Store the pressure as a leak pressure while the following conditions are met.
Phase D
JUDGMENT VALUE SPECIFICATION
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| Time required to reach to the target negative pressure | ≤ 27500 ms | P1451 |
| <Large leak (0.04 inch)> | P0455 | |
| Leak pressure | ≥ Value of Map 6 | |
| <Very small leak (0.02 inch)> | P0456 | |
| Leak pressure | < Reference pressure of 0.018 inch (Pa) and < Value of Map 6 |
MAP 6 VALUE SPECIFICATION
| Reference pressure (Pa) | -4856 | -4000 | -2750 | -1500 | -824 |
| Threshold Value (Pa) | -1785 | -1463 | -991 | -520 | -265 |
Formula for threshold value = Reference pressure x 0.377 - 0.341
Time needed for diagnosis: 23 min