Nox Sensor Control Modules --, CHECKING
WARNING: This page is about a different car, the 2012 Volkswagen Touareg and 2011 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.
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 Modules -- are:
- Nox Sensor Control Module -J583-.
- Nox Sensor Control Module 2 -J881-.
The Nox Sensor Control Module -J583- contains the following component:
The Nox Sensor Control Module 2 -J881- contains the following component:
The Nox Sensor Control Modules -- components cannot be serviced separately, and they 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:
-- NO:
- GATHER more information from customer about the complaint.
|
| 2 |
- IGNITION: OFF.
- DISCONNECT: Nox Sensor Control Module -J583- / Nox Sensor Control Module 2 -J881- harness connector.
- IGNITION: ON.
- CHECK: Nox Sensor Control Module -J583- / Nox Sensor Control Module 2 -J881- harness connector terminals 1 to 2 (and 5, if equipped) for voltage.
- SPECIFIED VALUE: Battery voltage.
- IGNITION: OFF.
-- Were Values obtained? |
-- YES:
-- 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.
|
| 3 |
- REMOVE: Engine Control Module - J623-. Refer to appropriate Service Information.
- CHECK: Nox Sensor Control Module -J583- / Nox Sensor Control Module 2 -J881- harness connector terminal 3 to the Engine Control Module - J623- harness connector T91 / 52 for resistance.
- CHECK: Nox Sensor Control Module -J583- / Nox Sensor Control Module 2 -J881- harness connector terminal 4 to the Engine Control Module - J623- harness connector T91 / 51 for resistance.
- SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
-- Were Values obtained? |
-- YES:
- REPLACE: Nox Sensor Control Module -J583- or Nox Sensor Control Module 2 -J881-. Refer to appropriate Service Information.
- GO TO: Step 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.
|
| 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.
- If all electrical connections are OK:
- REPLACE: Engine Control Module -J623-. Refer to appropriate Service Information.
- 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.
-- NO:
- Perform the diagnostic procedure for any DTC's.
- If no DTC's return, the repair is complete.
- Return vehicle to customer.
|