ECD SYSTEM, Diagnostic DTC:P2002
| DTC Code | DTC Name |
|---|---|
| P2002 | Particulate Trap Efficiency Below Threshold (Bank1) |
DESCRIPTION
Tech Tips
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For more information on the DPNR*1 catalytic converter and TOYOTA D-CAT*2, refer to the following procedures Click here.
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If P2002 is present, refer to the DTC table for TOYOTA D-CAT Click here.
Tech Tips
*1: Diesel Particulate NOx Reduction System
*2: Diesel Clean Advanced Technology
The DPNR catalyst has an ability to reduce particulate matter (PM), hydrocarbons (HC), carbon monoxides (CO) and nitrogen oxides (NOx). The DPNR catalyst is a monolithic type catalyst. Alternating passages in the catalyst have either their inlet or outlet blocked. This forces the exhaust gasses to flow through the walls of the passages (see illustration). Due to the flow of the exhaust gases through micro-cavities in the passage walls, it is called a "wall-flow" type converter.
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
|---|---|---|
| - | The Catalyst Record exceeds the threshold (Thermal deterioration malfunction) (1 trip detection logic). |
DPNR catalytic converter (Exhaust manifold converter sub-assembly) |
| DTC No. | Data List |
|---|---|
| P2002 | DPF Thermal Deteriorate |
MONITOR DESCRIPTION
In order to detect abnormality in the DPNR catalytic converter, the ECM monitors the exhaust gas temperature as well as differential pressure in front of and behind the DPNR catalyst.
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Furthermore, the ECM calculates and integrates the Catalyst Record of catalyst thermal deterioration data with the catalyst temperature. If Catalyst Record exceeds the threshold, the ECM interprets this as a malfunction in the DPNR catalyst and illuminates the MIL.
Thermal deterioration malfunction
INSPECTION PROCEDURE
Note
After replacing the DPNR catalyst, clear the thermal deterioration data stored in the ECM.
Tech Tips
Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
PROCEDURE
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REPLACE DPNR CATALYTIC CONVERTER
Tech Tips
When the DPNR catalytic converter (Exhaust manifold converter sub-assembly) is replaced, the catalyst record of DPNR thermal deterioration stored in the ECM must be cleared.
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Replace the DPNR catalytic converter (Exhaust manifold converter sub-assembly) Click here.
NEXT 
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CATALYST RECORD CLEAR
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Connect the intelligent tester to the DLC3.
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Turn the ignition switch to ON and turn the tester on.
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Enter the menu options in this order: Powertrain / Engine and ECT / Utility / Catalyst Record Clear.
NEXT 
END
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