Diagnostic Method
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Judgment value
JUDGMENT VALUE SPECIFICATION - DIAGNOSIS 1 (POWER SUPPLY SHORT)
| Malfunction Criteria | Threshold Value |
|---|---|
| High-pressure fuel pump supply voltage - High-pressure fuel pump terminal voltage (+) | 2 V or less |
JUDGMENT VALUE SPECIFICATION - DIAGNOSIS 2 (GROUND SHORT)
| Malfunction Criteria | Threshold Value |
|---|---|
| High-pressure fuel pump terminal voltage (-) - Ground | 2 V or less |
JUDGMENT VALUE SPECIFICATION - DIAGNOSIS 3 (OPEN CIRCUIT)
| Malfunction Criteria | Threshold Value |
|---|---|
| Condition 1 and condition 2 are continuously detected Condition 1: High-pressure fuel pump supply voltage - High-pressure fuel pump terminal voltage (+) |
2 V or less |
| Condition 2: High-pressure fuel pump terminal voltage (-) - Ground |
2 V or less |
JUDGMENT VALUE SPECIFICATION - DIAGNOSIS 4 (SHORT CIRCUIT, OVERCURRENT)
| Malfunction Criteria | Threshold Value |
|---|---|
| High-pressure fuel pump current 4 μs after driving IC command ON | 3 A or more |
Time needed for diagnosis: 75 times
ENGINE SPEED DESCRIPTION - MAP
| Engine speed (rpm) | Time needed for 75 times of diagnosis (sec) |
|---|---|
| 500 | 4.5 |
| 2000 | 1.125 |
| 4000 | 0.5625 |
| 6000 | 0.375 |
Malfunction indicator light illumination: Illuminates as soon as a malfunction occurs.