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1. Figure D CAUTION If the Charger Input is below 12 volts e A list of items to check is contained in the ECM Reprogramming For Nissan Vehicles general procedure Click here This will link you to the list Step 3 Reprogram the ECM e lf you are not familiar with ECM Reprogramming click here e This will link you back to a general procedure called ECM Reprogramming For Nissan Vehicles 10 11 Step 4 Wrap up After Reprogramming is Finished 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 second then b Turn the ignition switch OFF again for 10 seconds see Figure E e This will reset ECM self learned Data Ignition 2 Sec 2 Sec key ON Ignition key OFF 10 Sec 10 Sec TP030626b Figure E 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 lf the MIL comes ON use CONSULT II with the Diagnostic red white Card to erase any DTC s that may have stored during the reprogramming procedure 11 112. So this bulletin does not apply e Repair the exhaust leak as needed using repair information from the Service Manual and ASIST e Make sure to clear Self Learn and erase DTC after exhaust leak is repaired 4 11 5 7 Check for intake leaks and leaks at the PCV hose a Carefully inspect the air intake system and PCV hose for leaks b Refer to the Service Manual as needed d If there are no intake leaks go to step 6 e If you find an intake leak the leak is the likely cause of DTC P1273 e So this bulletin does not apply e Repair the intake leak as needed using repair information from the Service Manual and ASIST e Make sure to clear Self Learn and erase DTC after the intake leak is repaired Check the A F Sensor operation per the Service Manual ESM a If the A F Sensor checks OK go to step 7 b If the A F Sensor checks NG e Replace the sensor then e Go to the next page to see if ECM Reprogramming is needed NOTE DO NOT reprogram unless the A F Sensor checks N G If the A F sensor operation is OK and there are no intake or exhaust leaks replace the Rear O2 sensor Clear the ECM Self Learn again using CONSULT II in Work Support mode and make sure DTC P1273 is erased 5 11 CHECK TO SEE IF REPROGRAMMING IS NEEDED Compare your vehicle s ECM P N to those shown under Current ECM PIN in Chart A below e ECM Part Number is on the printout from Step 1 Figure 1 on page 3 VEHICLE Current
3. ECM P N CONFIGURATION 23710 QR25 2004 p 4 cylinder Altima 4 Y 9J310 9J311 50 States M T ASCD ULEV A T ASCD VQ35 V6 This TSB does not apply 50 state mason ASCD A 9J500 9J501 QR25 ATAS _ ASCD 9J505 9J506 2005 4 cylinder MT 9J565 9J566 Altima Chart A CAL M T ASCD 9J570 9J571 SULEV 9J520 9J521 A T ASCD 9J560 9J561 VQ35 V6 This TSB does not apply California Super Ultra Low Emission Vehicle CAL SULEV Ultra Low Emission Vehicles ULEV NOTE States that have traditionally required California emission vehicles may have both 50 state and CAL SULEV vehicles The easiest way to identify the vehicle s emission is with the current ECM P N and referring to chart A above A If your vehicle s ECM P N matches a P N in the chart above e Perform ECM Reprogramming on the next page B If your vehicle s ECM P N does not match a P N in the chart above e Reprogramming is not needed 6 11 ECM REPROGRAMMING Overview e There are 4 basic steps tasks for ECM Reprogramming Step 1 Download transfer reprogramming data from ASIST into CONSULT II Step 2 Preparation steps before reprogramming ECM Step 3 Reprogram the ECM Step 4 Wrap up after ECM reprogramming is finished NOTE e If you re not familiar with the latest ECM reprogramming procedures click here This will link you to the ECM Reprogramming For Niss
4. Technical Bulletin wae oa uaa sey Classification EC05 016a Date May 17 2006 2004 2005 ALTIMA MIL ON P1273 QR25 ENGINE MAY BE CAUSED BY THE REAR O2 SENSOR APPLIED VEHICLE 2004 2005 Altima L31 with QR25 4 cyl engine only IF YOU CONFIRM DTC code P1273 A F SENSOR1 B1 is stored ACTIONS 1 Using CONSULT II print the Freeze Frame FF data and clear the ECM Self Learn 2 Make sure the engine does not have any exhaust leaks intake leaks or leaks at the PCV hose 3 Check for proper operation of the Air Fuel A F sensor per the Service Manual ESM 4 lf the A F sensor is operating correctly and there are no intake or exhaust leaks replace the Rear O2 sensor 5 Clear the ECM Self Learn and make sure DTC is erased NOTE The Rear O2 sensor is used for some OBD II diagnostics of the front A F sensor If the Rear O2 sensor is malfunctioning it can cause a DTC for the front A F sensor IMPORTANT The purpose of ACTIONS above is to give you a quick idea of the work you will be performing You MUST closely follow the entire Service Procedure starting on page 3 as it contains information that is essential to successfully completing this repair 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 safel
5. an Vehicles general procedure e For those familiar with ECM Reprogramming please review the following steps and use them as a Quick Reference for ECM reprogramming 7 11 Step 1 Download Transfer Reprogramming Data From ASIST Into CONSULT II ECU Electronic Control Unit Vehicle SULT Reprogramming Data Model ane T File s selected m 1 File s selected ation Vehicle Configuration 1 E To 23710 XXXXX Engine 1 Trans 1 etc gt To 23710 XXXXX Engine 1 Trans 1 etc To 28710 XXXXX To Senra 2001 E Number E hicle Configuration 3 To 23710 XXXXX Engine 1 Trans 1 etc athfinde V Murano Xterra Frontier Replaces 23710 XXXXX XXXXX as ED i Search by Code e ea 22 ane BES maA continus f This illustration is for example only your vehicle may be different TP030621b Figure A 1 Select vehicle model and model year Example Altima 2004 2 Select the correct reprogramming data a Locate the specific Model Configuration Example QR25 ASCD NOTE Model 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 NOTE The To number will read 23710 XXXXX 3 Click on the Add button e This will add the data you selected to the F
6. ile s Selected list 4 Write the To number on the Repair Order 5 Click on Continue and follow directions to perform data transfer download from ASIST into CONSULT II 8 11 Step 2 Preparation Steps Before Reprogramming ECM 1 Connect a battery charger to the vehicle s battery e Set the charger to a low charge rate trickle charge Do Not Connect A C Power Supply CAUTION For step 2 and step 3 on the ET next page DO NOT connect the Power Supply CONSULT II A C Power Supply see Figure B TP040090 Figure B NISSAN 2 Press SUB MODE see Figure C then ELECTRONIC CONTROL UNIT REPROGRAMMING a From the listed items find and select AER OAC BATTERY CHARGE INITIATE ECU REPROGRAM C Ter Figure C TP030620 9 11 3 Check the CONSULT II s Charger Input Battery Charging CONSULT II Elapsed Discharge Charge Time Vehicle reading see Figure D Battery Battery Voltage 0091 02 00 00 00 00 01 02 Voltage Battery Voltage Charger Input MUST BE NOTE 8 32 12 15 Jhedvors 100 e Battery Voltage is the voltage level of Check Charger E 0 10 20 30 40 50 60 70 80 90 100 Input without CONSULT II s battery AC power Battery Charge IDLE supply connected Charger Input is the voltage level of Ge eee the vehicle s battery It must be above nee eee ee 12 volts TP030625
7. pair performed 2 11 SERVICE PROCEDURE 1 With CONSULT II ON print the Freeze Frame data as follows START Nissan gt gt gt gt Self DIAG Results gt gt F F Data gt gt PRINT 2 Attach this printout to the Repair Order SYSTEM ENGINE DATE XX XX XXXX XX XX XX Pi 23710 XXXXX em Cope e Figure 1 is an example of the F F Data FON Pan S Number e The Freeze Frame data that you ve printed ee ates contains the ECM Part Number P N DTC POXXx ode Example your screen may differ TP020389k Figure 1 e The ECM part number may be used to see if reprogramming is needed later in the Service Procedure 3 Clear the ECM Self Learn using CONSULT II in Work Support mode 3 11 4 Check the exhaust system for leaks a Lift the car in the air with the engine running at idle b Carefully inspect the exhaust system for leaks between the engine and just after the Rear O2 sensor Manifold Three way catalyst Rear O2 sensor is installed at the bottom TP051006 Figure 2 c Inspect carefully Pay special attention to the welded parts of the front tube and the sealed joints between the exhaust manifold and the front tube e Leaks are easier to find if you temporarily restrict the tailpipe to increase exhaust backpressure d If there are no exhaust leaks go to step 5 on the next page e If you find an exhaust leak the leak is the likely cause of DTC P1273 e
8. y 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 PARTS INFORMATION DESCRIPTION PART QUANTITY 226A1 AR210 1 A F Sensor 22693 8U300 1 if needed CLAIMS INFORMATION Submit a Primary Part PP type line claim using the following claims coding OP CODE DESCRIPTION a a DIA FRT RPL Rear O2 Sensor DE49AA Diagnosis DTC P1273 Ess9gaa 1 Reference the Parts Information table and use the indicated Rear O2 sensor P N as the PFP 2 Reference the current Nissan Warranty Flat Rate Manual and use the indicated FRT OR DESCRIPTION __PFP__ OPCODE SYM DIA FRT RPL Air Fuel Sensor DE53AA o dal Diagnosis DTC P1273 EJg89gaa 3 Reference the Parts Information table and use the indicated A F Sensor P N as the PFP 4 Reference the current Nissan Warranty Flat Rate Manual and use the indicated FRT And if necessary for RPL Air Fuel Sensor Only see Step 6 in the Service Procedure DESCRIPTION PFP OP CODE SYM DIA FRT Reprogram ECM per TSB 5 DE98AA HD 32 0 8 hrs 6 6 5 Reference the final CONSULT II print out and use the indicated new ECM P N as the PFP 6 FRT allows adequate time to access DTCs reprogram ECM and perform the A F Sensor function test NOTE Diagnosis time may only be used once per claim regardless of the re
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