NOx SENSOR INSPECTION [SKYACTIV-D 2.2]

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DTC Inspection

1.  Connect the M-MDS to the DLC-2.

2.  Perform the DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].)

•  If any DTC related to the NOx sensor is present, repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].)

Visual Inspection

Caution

•  Do not disconnect the connector between the NOx sensor control module and NOx sensor. Otherwise, it could adversely affect the NOx sensor control module.

•  To prevent a malfunction, do not clean the NOx sensor.

1.  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

2.  Remove the NOx sensor No.1 or No.2. (See NOx SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

3.  Visually inspect the NOx sensor No.1 or No.2 for the following malfunction:

•  Damage, cracks, soiling

•  Sensor end clogging

•  Rusted sensor terminal

•  Bent sensor terminal

•  Damage to exterior of wiring harness

―  If there is any malfunction, repair or replace the NOx sensor No.1 or No.2. (See NOx SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)