Removal and Installation: Removal
WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
- During regeneration, exhaust gas temperature can reach 800°C (1, 500°F), and exhaust system surface temperature can exceed 700°C (1, 300°F), which is hot enough to ignite or melt common materials, and to burn people. The exhaust and exhaust components can remain hot after the vehicle has stopped moving. To avoid the risk of fire, property damage, burns, or other serious personal injury, allow the exhaust system to cool before beginning this procedure or repair and make sure that no combustible materials are located where they are likely to come in contact with hot exhaust or exhaust components.
- Battery acid and battery acid fumes are extremely dangerous and can cause severe burns and explosion. To help reduce the risk of personal injury:
- Wear appropriate goggles and protective clothing.
- Always properly ventilate the area where the service is being performed.
- Never allow battery fluid to come in contact with skin, eyes, fabrics or painted surfaces.
- To avoid arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.
- If acid contacts eyes, skin or clothing, immediately flush with water for 15 minutes and seek medical attention.
- When using compressed air for cleaning, to avoid the risk of personal injury from flying debris and dirt:
- Do not exceed 207 kPa (2.111 kg/cm 2 , 30 psi).
- Wear appropriate eye protection and protective clothing including gloves.
CAUTION:
The DEF dosing valve is a fragile item. Use great care when handling this part. Avoid putting stresses on the fluid connectors, as damage to the component may result.
- Disconnect the battery or batteries. Refer to Battery Disconnect
- Remove the DOC and DPF assembly and the decomposition tube and SCR catalyst assembly together. Refer to Removal and Installation .
- Remove the nuts (A) that connect the DOC and DPF assembly to the decomposition tube and SCR assembly.CAUTION: Do not reuse gasket.
- Once the DOC and DPF assembly is removed from the vehicle, inspect the assembly.
If it must be replaced, follow the steps below:
- Remove the DPF temperature sensor module (2). Refer to Removal and Installation .
- Remove the DPF differential pressure sensor upstream (4) and downstream (3) tubes. Refer to Exploded View .
- Remove the DPF differential pressure sensor module (5). Refer to Removal and Installation .
- Remove the inlet NOx sensor (1). Refer to Removal and Installation .
- Remove clamps.