NOX Sensor Control Module - J583 -, Checking

General Description

The Nox Sensor Control Module -J583- / Nox Sensor Control Module 2 -J881- monitors the raw emissions of NOx in the exhaust and thus calculates the amount of AdBlue to inject into the exhaust system upstream of the SCR catalyst.

The Nox Sensor Control Module -J583- contains the following components:

Nox Sensor -G295-.

The Nox Sensor Control Module -J583- components cannot be serviced separately, it must be serviced as a unit.

Special Tools And Workshop Equipment Required

Multimeter.
Wiring Diagram.
Scan Tool.

Test Requirements

Fuses OK.
Battery voltage OK.
Switch OFF all electrical and electronic accessories.
Vehicles with Auto. Transmission, ensure Selector Lever position is in "P".
Vehicles with Man. Transmission, ensure Shifter Lever position is in "N" with Parking Brake applied.
Observe all safety precautions: SAFETY PRECAUTIONS .
View clean working conditions: CLEAN WORKING CONDITIONS .
For Hybrid vehicles refer to: HIGH VOLTAGE SYSTEM GENERAL WARNINGS .

Test Procedure

Step	Procedure	Result / Action to Take
1	PERFORM: Preliminary Check to verify the customers complaint. Refer to PRELIMINARY CHECK . -- Was Complaint verified?	-- YES: GO TO: Step 2 Nox Sensor Control Module - J583 -, CHECKING - 2 . -- NO: GATHER more information from customer about the complaint.
2	IGNITION: OFF. DISCONNECT: Nox Sensor Control Module -J583- harness connector. IGNITION: ON. CHECK: Nox Sensor Control Module -J583- harness connector terminals 1 to 2 for voltage. SPECIFIED VALUE: Battery voltage. IGNITION: OFF. -- Were Values obtained?	-- YES: GO TO: Step 3 Nox Sensor Control Module - J583 -, CHECKING - 3 . -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 4 Nox Sensor Control Module - J583 -, CHECKING - 4 .
3	REMOVE: Engine Control Module - J623-. Refer to appropriate repair manual. CHECK: Nox Sensor Control Module -J583- harness connector terminal 3 to the Engine Control Module - J623- harness connector T94 / 35 for resistance. CHECK: Nox Sensor Control Module -J583- harness connector terminal 4 to the Engine Control Module - J623- harness connector T94 / 36 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values obtained?	-- YES: REPLACE: Nox Sensor Control Module -J583-. Refer to appropriate repair manual. GO TO: Step 4 Nox Sensor Control Module - J583 -, CHECKING - 4 . -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 4 Nox Sensor Control Module - J583 -, CHECKING - 4 .
4	Final Procedure Perform a road test to verify repair. -- Does the original DTC return?	-- YES: CHECK: Engine Control Module -J623- harness connector for any damaged, pushed-out pins. REPAIR: As necessary. Clear the DTC's. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY . Repair is complete. Generate Readiness Code. Refer to READINESS CODE . Return vehicle to Customer. If all electrical connections are OK: REPLACE: Engine Control Module -J623-. Refer to appropriate repair manual. Repair is complete. Generate Readiness Code. Refer to READINESS CODE . Return vehicle to Customer. -- NO: Perform the diagnostic procedure for any DTC's. If no DTC's return the repair is complete. Return vehicle to customer.