1. Turn the ignition switch to OFF.
2. Disconnect the ground cable from battery.
3. Disconnect the ECM connector.
4. Set the ST between the ECM and body harness. 
| ST 18460AA010 | CHECK BOARD |
5. Connect the ground cable to battery.
6. Disconnect the DPF pressure difference sensor hoses A and B from the DPF pressure difference sensor, and connect the Mighty Vac to the DPF pressure difference sensor A.
|
(A) |
DPF pressure difference sensor |
(B) |
Mighty Vac |
7. Turn the ignition switch to ON. (engine OFF)
8. Using the Mighty-Vac, apply pressure up to 100 kPa (1 kgf/cm2, 14 psi) while measuring the voltage between the check board connector terminals.
CAUTION:
Do not pressurize over 150 kPa (1.5 kgf/cm2, 21.7 psi) to prevent damaging the DPF pressure difference sensor.
Terminals:
No. 56 (+) — No. 72 (−):
|
Pressure kPa (kgf/cm2, psi) |
Voltage (V) |
|
0 (0, 0) |
0.48 — 0.52 |
|
100 (1, 14) |
4.42 — 4.58 |
9. After inspection, install the related parts in the reverse order of removal.