`on` with dtc p0420 - Engine
Contents
1. key ON About 2 Sec About 2 Sec Ignition key OFF 10 Sec 10 Sec TP030626a Figure 7 3 Start the engine and check the idle speed e f idle speed is too low perform Idle Air Volume Learning IAVL See the appropriate Service Manual ESM for this procedure NOTE If the engine will not idle hold the engine RPM at about 2000 then slowly bring it down to an idle IAVL can now be performed 4 Confirm the engine is operating normally 5 Make sure the MIL is OFF e If it s still ON use CONSULT II with the Diagnostic red white Card to erase any DTCs that may have stored during the reprogramming procedure 11 112. NISSAN NORTH AMERICA INC EN Technical Bulletin 5 opyright m 8 SERVICE BULLETIN EC05 017a NTB06 004a April 3 2007 MIL ON WITH DTC P0420 CATALYTIC CONVERTER IS UNDAMAGED This bulletin has been amended to expand the Applied Vehicle and VIN DATE range A diagnostic flowchart has also been added The ACTION statement has been changed Chart A has been amended No other content has been changed APPLIED VEHICLES 2004 2006 Altima L31 APPLIED ENGINE SULEV QR25 Engine Only California emission specification Super Ultra Low Emission APPLIED VIN DATE Vehicles built before 1N4AL11D 6 C 207000 Smyrna production Vehicles built before March 17 2006 APPLIED VIN DATE Vehicles built before 1N4AL11D 6 N 392000 Canton production Vehicles built before March 20 2006 IF YOU CONFIRM e The check engine light is ON e DTC P0420 is stored in the ECM ACTION Refer to the flowchart on page 3 to see if this bulletin applies Nissan Bulletins are intended for use by qualified technicians not do it yourselfers Qualified technicians are properly trained individuals who have the equipment tools safety instruction and know how to do a job properly and safely NOTE If you believe that a described condition may apply to a particular vehicle DO NOT assume that it does See your Nissan dealer to determine if this applies to your vehicle 1 11 CLAIMS INFORMATION Submit a Primary
3. This illustration is for example only your vehicle may be different TP030621g Figure 3 1 Select vehicle model and model year Example Altima 2005 2 Select the correct Reprogramming Data a Locate the specific Vehicle Configuration Example A T ASCD NOTE Vehicle Configuration may include items such as engine type transmission type and vehicle options such as ASCD TCS ABS etc b Select click on the To number for your Vehicle Configuration for the Reprogramming Data Write the To number on the repair order NOTE The To number will read 23710 XXXXX 3 Click on the Add button e This will add the selected data to the File s Selected list 4 Click on Continue and follow the on screen directions to perform data transfer download from ASIST into CONSULT II 8 11 Step Two Preparation Steps Before Reprogramming 1 Connect a battery charger to the vehicle s battery e Set the charger to a low charge rate trickle charge CAUTION For number 2 below and number 3 on the next page DO NOT connect the CONSULT II AC power supply 2 Press SUB MODE see Figure 5 then a From the listed items find and select BATTERY CHARGE 9 11 Do Not Connect A C Power Supply Consult Il A C Power Supply TP040090 Figure 4 NISSAN ELECTRONIC CONTROL UNIT REPROGRAMMING AERO2C 2 INITIATE ECU REPRO
4. oil pan gt De Z4 Front Exhaust oe Nee NOTE The stud s may come out of the Catalyst when removing the nut this is okay Just re install them later Figure 1 2 Remove the two nuts that hold the front exhaust pipe to the muffler see Figure 2 Then separate the front exhaust pipe from the muffler Discard the old gasket Replace with a new gasket during reassembly Replace gasket Slide the front exhaust pipe hanger pin out of the front exhaust pipe hanger see Figure 3 Z eS LS Remove the exhaust pipe from the vehicle Ws SS amp Front exhaust ppe acs 5 co S Front exhaust ppe E S hanger pin so TP0301 12a 7 Inspect the entire catalyst lower surface condition as shown in Figure 4 5 11 IMPORTANT Make sure you inspect the entire lower surface You are looking for cracks or holes in the lower surface OK powder scratch discoloration NG crack hole Seer OAL eee Ce Gs Nae aah CME ADE va ATA aT oe eg OON SOCADOS Boo Inspect catalyst lower surface ee 1P030611b Figure 4 e lf the catalyst is NG with cracks or holes Replace the catalyst using standard Warranty procedures This bulletin does not apply e If the catalyst is OK with only powder scratch or discoloration do not replace the catalytic converter reassemble the vehicle in the reverse
5. 2005 M T 23710 9J56B 9J56A 9J567 9J566 9J565 2005 M T ASCD 23710 9J57B 9J57A 9J572 9J571 9J570 2006 A T 23710 ZD84D ZD84C ZD84B ZD84A 2006 A T ASCD 23710 ZD85D ZD85C ZD85B ZD85A 2006 M T 23710 ZD86D ZD86C ZD86B ZD86A 2006 M T ASCD _ 23710 ZD87D ZD87C ZD87B ZD87A Up to Applied Date VIN shown on page 1 of this bulletin e f your vehicle s ECM P N_matches one of the Current ECM P Ns in the chart above this bulletin applies Go to Step B e f your vehicle s ECM P N does not match one of the Current ECM P Ns in the chart above this bulletin does not apply Go back to ASIST for further diagnostic and repair information Step B P0420 DTC Confirmation Procedure In the respective ESM perform P0420 DTC Confirmation Procedure Overall Function Check and Diagnostic Procedure However stop at the point of replacing the catalytic converter Do not replace the catalytic converter e lf the Diagnostic Procedure checks are not OK this bulletin does not apply e lf all Diagnostic Procedure checks are OK do not replace the catalytic converter go to Step C 4 11 Step C Remove the front exhaust pipe and inspect the catalyst lower surface 1 Remove the two nuts that hold the front Lower exhaust exhaust pipe to the exhaust manifold fiend catalyst see Figure 1 Discard the old gasket Replace with a new gasket during reassembly A C 28 Hi Engine Y i
6. Part PP type line claim using the following claims coding DESCRIPTION PFP OP CODE SYM DIA FRT DTC P0420 Diagnosis 1 EJ41AA HD 32 2 1 Reference the CONSULT II printout and use the indicated ECM P N as the PFP 2 Reference the current Nissan Warranty Flat Rate Manual and use the indicated FRT And only if diagnosis is OK DESCRIPTION OP CODE FRT R amp R Front Exhaust Tube FD10AA 2 2 Reference the current Nissan Warranty Flat Rate Manual and use the indicated FRT And only if Catalytic Converter is NOT damaged DESCRIPTION OP CODE FRT Reprogram ECM per TSB DE98AA 0 5 hrs And IF necessary DESCRIPTION OP CODE FRT Perform IAVL Procedure DE96AA 2 2 Reference the current Nissan Warranty Flat Rate Manual and use the indicated FRT PARTS INFORMATION DESCRIPTION PART QUANTITY Bearing Seal exhaust joint 20695 8J010 r Gasket exhaust 20692 65J00 1 2 11 DIAGNOSTIC FLOWCHART Step A Does the current ECM P N match one in Chart A page 3 YES Step B Perform P0420 DTC Confirmation Procedure page 4 Checks are OK Do not replace the catalytic converter Perform Step C Visually inspect the catalyst lower surface page 5 NO Catalyst is NOT damaged Checks not OK Catalyst is damaged Do not replace the catalyst Go to step D Reprogram This bulletin does not apply the ECM page 7 Replace the ca
7. GRAM Ter TP030620a Figure 5 3 Check the CONSULT II Charger Input reading see Figure 6 NOTE e Battery Voltage is the voltage level of the CONSULT II battery e Charger Input is the voltage level of the vehicle s battery It must be above 12 volts Battery Charging CONSULT II Elapsed Discharge Charge Time Vehicle Batter Voltage 0091 02 00 00 00 00 01 02 are Battery Voltage Charger Input MUST BE 2 12 1 00 VOLT m n 12 00 VOLTS 0 100 E Check Charger O 10 20 30 40 50 60 70 80 90 100 Input without AC power Battery Charge IDLE supply connected Start Discharge amp Charging Charge MODE BACK LIGHT COPY TP030625 CAUTION If the Charger Input is below 12 volts Figure 6 A list of items to check is contained in the ECM Reprogramming for Nissan Vehicles General Procedure Click here o link to it Step Three Reprogram The ECM e lf you are not familiar with ECM Reprogramming clicl here Procedure 10 11 This will link you back to the ECM Reprogramming for Nissan Vehicles General Step Four ECM Reprogramming Wrap up 1 Turn the ignition switch OFF and CONSULT II OFF 2 Wait more than 10 seconds then a Turn the ignition switch ON for 2 seconds then b Turn the ignition switch OFF again for 10 seconds see Figure 7 e This will reset ECM self learned Data Ignition
8. order of disassembly and go to step D 6 11 Step D Reprogram the ECM Vehicle ECU Reprogramming Overview e There are four basic steps Step 1 Download reprogramming data transfer it from ASIST into CONSULT II Step 2 Preparation steps before reprogramming Step 3 Reprogram the ECM Step 4 ECM reprogramming Wrap up If you are familiar with ECM reprogramming e Review Step One though Step Four starting on page 8 e Use them as a Quick Reference for ECM reprogramming If you are not familiar with ECM Reprogramming click here e This will link you to the ECM Reprogramming for Nissan Vehicles General Procedure 7 11 Step One Download Reprogramming Data Transfer Data From ASIST Into CONSULT II lt ECU Electronic Control Unit Vehicle CONV Reprogramming Data NS Model 3502 J on Click the Add button i a 5 2 Som our e a TFile s selected ehicie Contiguration 5 1A To 23710 XXXXX Engine 1 Trans 1 etc Altima WI Z002 J E 1B To 23710 XXXXX Engine 1 Trans 1 etc To 28710 XXXXX Vehic configuration 2 Sentra 2A To 23710 XXXXX Engine 1 Trans 1 etc 2B To 23710 XXXXX Engine 1 Trans 1 etc hicle Configuration 3 To 23710 XXXXX Engine 1 Trans 1 etc X E To Frontier Number Search by Code a ayal aes aoj esf e
9. talyst under normal Warranty procedures END y y This bulletin does not apply Go back to ASIST for further diagnostic assistance NOTE This bulletin and the associated reprogramming only apply to vehicles with undamaged three way catalysts SERVICE PROCEDURE Step A Confirm This Bulletin Applies Check the Current ECM Part Number P N 1 With CONSULT II ON print the ECM Part Number as follows 2 Attach this printout to the Repair Order e Figure 1 is an example of the ECM Part 23710 XXXXX Number printout e You will use the ECM Part Number P N to see if this bulletin applies Figure 2 TP050001 3 11 Compare Your Current ECM P N To Chart A Using the ECM P N printout from Step 2 Figure 2 e Compare your vehicle s ECM P N to those shown under Current ECM P N in Chart A below Chart A CAUTION Some States that have required California emissions may have both CAL SULEV and 50 State Emissions Level vehicles e tis best to refer to the Current ECM P N to determine the vehicle configuration M Y Configuration Current ECM P Ns 2004 A T 237 10 9J34B 9J34A 9J321 9J320 2004 A T ASCD 23710 9J35B 9J35A 9J361 9J360 2004 M T 237 10 9J36B 9J36A 9J366 9J365 2004 M T ASCD 23710 9J37B 9J37A 9J371 9J370 2005 A T 23710 9J54C 9J54B 9J54A 9J522 9J521 9J520 2005 A T ASCD 23710 9J55C 9J55B 9J55A 9J562 9J561 9J560
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