System Readiness Test (SRT) Drive Patterns (NTB98-018D)

Step 1: Check for DTC

1. Connect CONSULT.
2. Turn ignition ON and read the program card ID on CONSULT screen (Fig 2).
   • If this screen indicates a card identification other than UE991, refer to "Loading Program Card" on page 7 of this bulletin for details.
     Fig 2: CONSULT Screen - Program Card ID

     
     Fig 3: CONSULT Screen - Program Card

     
3. If the UE991 card is loaded, Touch: Start, Engine, Self Diagnosis Results  (Fig 3).
   • If any Diagnostic Trouble Codes (DTCs) come up, they must be repaired at this time. Refer to ASIST and the service manual for diagnostic information.
     NOTE: Normal warranty coverage will apply to the above repairs.
   • If the CONSULT screen indicates: "No Self Diagnostic Failure Indicated," go to the next step. Touch the "Back"  key on CONSULT keypad and return to the Engine  menu.
     NOTE: DO NOT touch "Erase" or you will lose previously completed SRT items.

Step 2: Check SRT Status

Starting from CONSULT's Engine  menu:

1. Touch SRT-Confirmation, then touch SRT Status.
2. The screen will display the status of all SRT items for the vehicle being inspected (Fig 4).
   Fig 4: CONSULT Screen - SRT Status

   

In some cases, the normal driving that occurs between the time the vehicle was referred by the State Emissions Inspection Station and it is brought into the dealership for SRT evaluation may allow the ECM to complete the SRT. If this occurs, no further action is necessary on the part of the dealership. Always check SRT status before performing the SRT drive pattern. 

Step 3: Identify the Vehicle

To verify the SRT status and to choose the Drive Pattern, it is extremely important to accurately identify the model, engine, ECM part number, model year, powertrain, and emissions certification of the vehicle.

• Print or photocopy the Vehicle Identification Worksheet provided on page 10 of this bulletin.
• Carefully follow the instructions to completely fill out the worksheet.
• Attach a copy of the completed worksheet to the hard copy of the Work Order.

Step 4: Check ECM Part Number

Use CONSULT to display the ECM part number (Fig 5).

1. From the Engine menu, touch: ECM Part Number. 
   Fig 5: CONSULT Screen - ECM Part Number

   
2. Touch the blank key on CONSULT's key pad to print the screen (Fig 5).
3. Attach the printout or write the ECM part number in the space provided on the SRT Vehicle Identification Worksheet  (page 10).
4. Touch "Back"  on the CONSULT keypad to return to the Engine  menu.
   • Compare the ECM part number displayed by CONSULT with the list of ECM part numbers provided in the Nissan SRT System Chart (page 11) to determine the drive pattern for the vehicle being inspected. Write that information on the SRT Vehicle Identification Worksheet. 
   • If the ECM part number displayed by CONSULT does not match a part number listed on the SRT System Chart for that vehicle, either 1) the vehicle was identified incorrectly or 2) the vehicle has the wrong ECM installed. The SRT cannot be completed with the incorrect ECM.

Step 5: SRT Road Test

To properly obtain an SRT reading of "COMPLETE,"  it is necessary to drive the vehicle under the exact conditions required by the vehicle's ECM. This bulletin contains specific driving patterns for every 1996 and 1997 Nissan vehicle. Be sure to select the correct pattern. The SRT will not set  if the wrong drive pattern for the vehicle is selected.

1. Select the Drive Pattern based on the information from the SRT Vehicle Identification Worksheet and the SRT System Chart:
   • Use the "Bookmark" on the left side of the ASIST screen to choose the correct model and year.
   • Verify that the vehicle ECM P/N as displayed by CONSULT matches EXACTLY  an ECM P/N listed on the Drive Pattern sheet you chose.
   • Print out the pattern to take with you on your test drive.
2. Prior to driving the vehicle, review the Drive Pattern and prepare to complete it from start to finish:
   • Confirm the ECM part number displayed on CONSULT for this vehicle matches with an ECM part number on the drive pattern selected.
   • Review the Pre-Check items listed on the drive pattern and ensure all conditions are met.
   • Determine the vehicle speeds required by the drive pattern.
   • Plan your route to minimize traffic and traffic signals that might interrupt the Drive Pattern tasks.
   • Review the Drive Pattern section(s) that must be restarted if you are interrupted.
   • Do not use the ASCD (cruise control) during any section of the Drive Pattern that contains the "No ASCD" symbol.
   • Some EVAP-equipped vehicles will require fuel be added to the tank between the first and second trip. Be prepared to purchase fuel or plan your route to accommodate this step.
   • For these EVAP-equipped vehicles, begin road test with less than 1/2 tank of fuel. If fuel level is greater than 1/2, more time may be required to complete EVAP sections of the drive pattern. You also may be unable to add fuel as required.
3. Preparing to drive the vehicle:

   Vehicles without OBD-II monitored EVAP System: 

   1. Starting with the CONSULT Engine  Menu, touch: SRT Confirmation, SRT Work Support, Main Signals. CKPS-RPM (POS), THRTL POS SEN, and B/Fuel SCHDL will automatically be selected as monitor items. (Fig 6)
      Fig 6: CONSULT Screen - SRT Work Support Screen

      
   2. Proceed to # 4, "Driving the vehicle", on the next page.

   Vehicles with OBD-II monitored EVAP System: 

   1. Starting with the CONSULT Engine Menu, touch: SRT Confirmation, SRT Work Support, Main Signals.
   2. If TANK F/Temp SE is not already displayed, touch the BACK key to return to the SRT Work Support screen.
   3. Touch: Selections From Menu and select CKPS-RPM (POS), THRTL POS SEN, and B/FUEL SCHDL if not already highlighted. Also select TANK F/TEMP SE then touch the ENTER key.
   4. Proceed to # 4, "Driving the vehicle", below.

   TIP:  Monitor the Fuel Temperature if the EVAP SRT is "INCOMPLETE."  One part of the EVAP SRT diagnostic logic requires a 3° C. increase in fuel temperature from the time the ignition key is turned to "on" as part of the test criteria. Fluctuations in the fuel temperature reading can extend the time required for the EVAP SRT to indicate "COMPLETE."  If the fuel temperature change is not sufficient after completing the SRT Drive pattern, idle the vehicle until a fuel temperature increase of at least 3° C. is noted or until the EVAP SRT indicates "COMPLETE." 

   NOTE: If the fuel temperature increases 3° C. or more but the SRT still indicates "INCOMPLETE,"  the SRT Drive Pattern may need to be repeated.
   Fig 7: Identifying SRT Work Support Screen

   
   Fig 8: Identifying SRT Work Support Screen

   
4. Driving the vehicle:
   IMPORTANT: Nissan requires and flat rate time allows using a driver and an assistant to conduct SRT driving patterns. The assistant should read the drive pattern, CONSULT data and drive time and convey driving instruction to the driver. It is the driver's responsibility to observe and react to traffic conditions. Always drive the vehicle in a safe manner and obey all traffic laws. 
   • To ensure all ECM Self Test requirements are met, drive the ENTIRE pattern  whenever any SRT items indicate "INCOMPLETE." 
   • Some vehicles require that sections of the Drive Pattern be driven two times  to satisfy the self diagnosis two trip logic. This requirement is called out in the Nissan SRT System Chart and by a double line in the actual drive patterns. For vehicles that require two trips, the pre-check engine coolant temperature must be met before beginning Section 1 of the second trip.
5. Start the Drive Pattern test:
   • After meeting the Pre-Check conditions, start the engine and carefully follow the specific instructions and time requirements listed in each section of the drive pattern.

TIP:  The Base Fuel Schedule (B/FUEL SCHDL) is an indication of engine load. It will be easier to match high B/FUEL SCHDL values when driving up slight hills in the recommended gear range. It will be easier to match low B/FUEL SCHDL values when driving down slight hills in the recommended gear range. Turning the A/C compressor ON  will increase  the B/FUEL SCHDL value, while turning it OFF  will decrease  the value of the B/FUEL SCHDL.

Step 6: Recheck for DTC

Upon completion of the Drive Pattern determine if any DTCs have been stored. Refer to Step  1 on for details. Only in rare cases will this occur.

• If a DTC has been stored after completing the Drive Pattern, it must be repaired. Refer to ASIST and the service manual for diagnostic information.
  NOTE: Normal warranty coverage will apply to these repairs.
• Once the DTC is repaired, touch "Erase"  on the CONSULT Self Diagnosis Results  screen to clear the Self Diagnosis Memory and turn ignition switch "Off" for 10 seconds. Restart the ignition and repeat the entire Drive Pattern (Step 5)  to set the SRT.
• If no DTCs have been stored, DO NOT touch the "Erase" key or all SRT items will reset to "INCOMPLETE." 

Step 7: Confirm All SRT "COMPLETE"

Refer to the procedure in Step 2  to check the SRT status using SRT-OBD Confirmation mode.

• If all SRT items for this vehicle as shown on the Drive Pattern sheet or Nissan SRT System Chart indicate "COMPLETE  ," the inspection is complete.

CONSULT Program Card Loading Instructions 

To load program card UE991 into CONSULT memory:

1. With one hand, touch and hold the upper two corners of the CONSULT screen (Fig 9).
2. While holding the upper corners, push the "on" switch with the other hand. The two screen corners must be held when the switch is turned "on." If not an alarm will sound.
3. The screen should indicate: "Initialize by card" and provide an alphabet key pad (Fig 9). If it does not, or you hear an alarm sound, push the "off" button and repeat steps one and two.
4. Insert the program card in the card slot. Be sure the end of the card with the connector holes faces in and the card seats fully in the slot.
5. Touch the "Y" key. The screen will begin to list a series of four letter codes. This indicates the program is loading. It will take several minutes to load. Do not disturb or touch any buttons while it is loading. When the program loading is complete the screen will display "Initialization End" (Fig 9).
   Fig 9: CONSULT Screen - CONSULT Program Card Loading Instructions

   
6. Push the "off" button and allow CONSULT to power down.
7. Push the "on" button. CONSULT should display the new program card number on the "START" screen. If so, the new program is ready to use. If not repeat all steps.