NOX SENSOR INSPECTION [MZR-CD 2.2]SM2445004
NOX SENSOR INSPECTION [MZR-CD 2.2]

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Sensor Output Value Inspection

1.Connect the M-MDS to the DLC-2.

2.Start the engine.

3.Monitor the following items using the PID/data monitor function. (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)

• PID NOX_CON
• PID NOX_STAT

4.Perform the diesel particulate filter manual regeneration. (See DIESEL PARTICULATE FILTER REGENERATION [MZR-CD 2.2].)

5.Inspect the NOx sensor using the following procedure after the diesel particulate filter manual regeneration is finished:

Procedure

Inspection

Action

1
Is 30 displayed for PID NOX_STAT?
Yes
Go to Step 2.
No
Go to Step 3.
2
Does the PID NOX_CON value increase as speed increases and decrease as speed decreases while repeating the following procedure three times?
• After racing the engine to 4,000 rpm slowly, decrease the idle speed to idle once.
Yes
The NOx sensor is normal.
Verify if there is any other malfunction.
No
Replace the NOx sensor.
3
Is any malfunction other than the NOx sensor verified?
Yes
Inspect for any other malfunction and after repairing, re-inspect.
No
Replace the NOx sensor.