Service Procedure
SRT WORKFLOW CHART
Step 1, Check For DTC
1. Connect CONSULT.
2. Turn ignition ON and read the program card ID on CONSULT screen (Figure 1).
^ If this screen indicates a card identification other than UE991, refer to "Loading Program Card" in this bulletin for details.
3. If the UE991 card is loaded, Touch: Start, Engine, Self Diagnosis Results (Figure 2).
^ If any Diagnostic Trouble Codes (DTC's) are indicated, they must be repaired at this time. Refer to ASIST and the service manual for diagnostic information.
NOTE: Normal warranty coverage will apply to these repairs.
^ If the CONSULT screen indicates: "No Self Diagnostic Failure Indicated," proceed with the next step. Touch the "Back" key on CONSULT keypad and return to the Engine menu.
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 (Figure 3).
In some cases, the normal driving that occurs between the time the vehicle was referred by the emissions inspector 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 patterns.
Step 3: Identify The Vehicle
To verify the SRT status and to choose the drive pattern correctly, it is extremely important to accurately identify the model, engine, ECM part number, model year, powertrain and emissions certification of the vehicle.
^ Photocopy the Vehicle Identification Worksheet shown in 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 (Figure 11).
1. From the Engine menu, touch: ECM Part Number.
2. Touch the blank key on CONSULT's key pad to print the screen (Figure 11).
3. Attach the printout or write the ECM part number in the space provided on the Vehicle Identification Worksheet.
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 SRT System Chart to determine the drive pattern for the vehicle being inspected. Write that information on the 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 the vehicle was identified incorrectly or the vehicle has the wrong ECM installed. The SRT cannot be completed with the incorrect ECM.
Step 5: SRT Road Test
To set the SRT to "complete" it is necessary to drive the vehicle under the exact conditions required by the ECM. This bulletin contains specific driving patterns for every 1996 and 1997 Infiniti 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. The vehicle ECM P/N as displayed by CONSULT MUST match an ECM P/N listed on the Drive Pattern sheet.
2. Prior to driving the vehicle, review the drive pattern and prepare to carry it out in its entirety:
^ 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.
^ Review Drive Pattern section(s) that must be restarted if interrupted.
^ Do not use the ASCD (cruise control) during any section of the drive pattern that contains the "No ASCO" symbol.
^ Some 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.
^ Always confirm the ECM part number displayed on CONSULT for this vehicle matches with an ECM part number on the drive pattern selected.
^ For vehicles where EVAP is applicable, 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 OBDII monitored EVAP System:
^ 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 5)
^ Perform SRT Drive Pattern as indicated in # 4 Driving the vehicle.
Vehicles with OBDII monitored EVAP System:
^ Starting with the CONSULT Engine Menu, touch: SRT Confirmation, SRT Work Support, Main Signals.
^ If TANK F/Temp SE is not already displayed, touch the BACK key to return to the SRT Work Support screen.
^ Touch: Selections From Menu and select CKPS-RPM (POS), THRTL P05 SEN, and B/FUEL SCH DL if not already highlighted. Also select TANK F/TEMP SE then touch the ENTER key
^ Perform SRT Drive Pattern as indicated in # 4.
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.
4. Driving the vehicle:
Infiniti requires and flat rate time supports 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 sate 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 SRT System Chart and by a double line in the actual drive patterns.
NOTE:
For vehicles that require two trips, the pre-check temperature must be met before beginning Section 1 of the second trip.
^ 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.
TIPS:
^ The Base Fuel Schedule (B/FUEL SCH DL) 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 SCH DL 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 DTC's have been stored. Refer to step 1 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 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 DTC's 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 view the SRT status using SRT-OBD Confirmation mode.
^ If all SRT items for this vehicle as called out on the drive pattern sheet or SRT System Chart indicate complete, the inspection ends.
^ After completing ALL sections of the drive pattern, if one or more SRT items indicate incomplete, call Infiniti TECH LINE for assistance.
Program Card Loading Instructions
To load a program card into CONSULT memory:
1. With one hand, touch and hold the upper two corners of the CONSULT screen (Figure 8a).
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 (Figure 8b). 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" (Figure 8c).
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.