9041982

Component Inspection

■ Visual Inspection on DPF Differential Pressure Sensor

Ignition switch "OFF"

Refer to "Shop Manual" and disconnect DPS connector.

Inspect for corrosion or contamination on DPS terminal.

Inspect for proper installation of DPS, DPS hose and leakage on exhaust system.

Inspect for foreign substance on DPS and DPF assembly.

Inspect for Leakage on exhaust system.

Have any problems been found?

	▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
	▶ Go to "DPS Signal Inspection" procedure.

■ DPS Signal Inspection

Ignition switch "OFF"

Connect VMI to GDS and set up the Oscilloscope.(2 Channel):

Channel A (+) : Pin No. 2 (Signal) terminal (DPS Harness Connector)

Channel A (-) : Ground

10.

Ignition switch "ON" & Engine "OFF"

11.

Inspection condition : Ignition switch "ON" or Engine "ON"

Specification :

Ignition switch "ON" : Approx. 1.0V

Engine "ON" : Output voltage varies in according to actual differential pressure. (Refer to table below)

Differential Pressure [△P] [kPa (kg/cm² / psi)]	Output Voltage (V)
0	1
10 (0.1 / 1.45)	1.35
20 (0.2 / 2.90)	1.7
30 (0.3 / 4.35)	2.05
40 (0.4 / 5.80)	2.4
50 (0.5 / 7.25)	2.75
60 (0.6 / 8.70)	3.1
70 (0.7 / 10.10)	3.45
80 (0.8 / 11.60)	3.8
90 (0.9 / 13.00)	4.15
100 (1.0 / 14.50)	4.5

12.

Is the measured value within specification?

▶ Fault is intermittent caused by poor contact in the sensor’s and/or ECM’s connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of vehicle Repair" procedure.

▶ Carefully re-do this troubleshooting guide steps.

▶ If no problems were found with the circuits or connectors, replace the DPS and go to "Verification of Vehicle Repair" procedure.

caution

•

When DPS is replaced, perform "Essential work after component replacement. Otherwise, vehicle performance and emission control may not work properly until auto learning is completed.

Vehicle S/W Management

■ In case of Differential Pressure Sensor(DPS) is replaced, perform follwoing procedures;

Ignition switch "OFF"

Connect GDS to Data Link Connector (DLC).

Ignition switch "ON" & Engine "OFF"

Perform "Essential Work After Component Replacement" in "Vehicle S/W Management" with GDS.

Select "Differential Pressure Sensor Change"

Fig.1) Vehicle S/W Management list of U2 engine

Fig.2) "Essential Work After Component Replacement"

Fig.3) Differential Pressure Sensor Change

Fig.4) Complete