Description

First of all check damage of terminals : Check terminals for contact resistance, corrosion and deformation. Before measuring resistance, you must calibrate(0Ω) the tester.

In case of abnormal "Air mass meter" data, Inspect the EGR Actuator valve.

Diagnostic Procedure
EGR Actuator valve resistance inspection.
1.

IG KEY "OFF", ENGINE "OFF"

2.

Disconnect EGR Actuator valve connector.

3.

You must calibrate (0Ω) the tester.

note

Refer to "Multimeter calibration" of detail inspections (Equipment settings).

4.

Measure the resistance between EGR Actuator valve terminal 1 and 2.

A.

Specification : 7.5 Ω ± 10% ( 20℃ )

EGR Actuator valve sticking inspection.
5.

Disconnect EGR Actuator valve connector.

6.

Inspect the EGR Actuator valve after supplying battery voltage to EGR Actuator valve terminals.

☞ Inspect EGR Actuator valve operating sound, EGR Actuator valve operation (opening ↔ closing).

☞ Inspect carbon deposit in the EGR Actuator valve.

Symptom

Inspection procedure

Case1

● EGR Actuator valve is open stuck.

● Engine poor acceleration occurs and engine discharges black smoke, etc…because of excessive EGR gas recirculation.

● Replace the EGR Actuator valve.

Case2

● In case that EGR Actuator valve is close stuck.

● DTCs of EGR system are displayed and engine discharges excessive NOx, etc... because EGR gas can not be recirculated.

● Replace the EGR Actuator valve.

Case3

● EGR Actuator valve operation is normal.

● If EGR Actuator valve operation is normal but MAFS current data is abnormal,

☞ Go to "MAFS inspection" procedure.

Яндекс.Метрика