Classification:

Reference:

Date:

EC98-002f

ITB98-011f

June 7, 2013

SYSTEM READINESS TEST (SRT) DRIVE PATTERNS
This bulletin has been amended. Additional changes were made on page 9.
Please discard all previous versions of this bulletin.

APPLIED VEHICLES: 1996 and newer Model Years as required by State Emissions Inspections
Regulations.

SERVICE INFORMATION
As part of an enhanced emissions test for Inspection & Maintenance (I/M), some States may require the
System Readiness Test (SRT) status be checked.
•

The SRT is used to indicate whether the engine control module (ECM) has completed self diagnosis of
major emissions systems and components.

•

In these instances the State may require completion of the SRT before permitting the emissions
inspection to proceed.

The State Emissions Inspection Station may advise an Infiniti customer to return to the dealership for service
due to one or more SRT items coming up “INCOMPLETE.” Use the information in this Bulletin to help you
“COMPLETE” the SRT.
•

In most cases the ECM will automatically complete its self diagnosis cycle during normal vehicle usage,
and the SRT status will indicate “COMPLETE” for each applicable system.

•

Once indicating “COMPLETE,” the SRT status remains “COMPLETE” until the Self Diagnosis memory
is erased.

•

Occasionally, certain portions of the self diagnostic test may not be completed as a result of the
customer’s normal driving pattern. In these cases the SRT will indicate “INCOMPLETE” for these items.
NOTE: The SRT will also indicate “INCOMPLETE” if:
•

The self diagnosis memory is erased for any reason, or

•

The ECM memory power supply is interrupted for several hours.

Infiniti 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 Infiniti dealer to determine if this
applies to your vehicle.
1/27

This bulletin contains information to help you perform a comprehensive road test (Drive Pattern) that enables
the ECM to complete the SRT.
•

A separate Drive Pattern sheet for each 1996 and 1997 vehicle variation is included with this Bulletin.

•

For 1998 and newer vehicles, refer to the EC section of the appropriate Service Manual for the required
Drive Pattern. They are listed under On Board Diagnostic > System Readiness Test.

NOTE: You must select the Drive Pattern that correctly corresponds with all variables for the vehicle
being serviced (i.e. model, model year, engine, emissions certification, transmission, powertrain, and
for 1996/1997 models, ECM part number.

NOTE: To ensure all ECM Self Test requirements are met, it is important to drive the entire Drive
Pattern even if only one SRT item indicates “INCOMPLETE.”

CLAIMS INFORMATION:
Refer to the current Warranty Flat Rate Manual for claims information.

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ITB98-011f

SERVICE PROCEDURE
SRT WORKFLOW
Vehicle Referred by IM Inspector

Start
Step 1
Check DTCs

DTC

Use ASIST to diagnosis and
repair DTCs

**Do Not Erase**

Step 2:
Check SRT Status

All SRTs “COMPLETE”

Step 3:
ID the Vehicle

Step 4:
Obtain ECM P/N
(1996 & 1997 only)

Step 5:
Perform Road Test
(Drive Pattern)

Step 6:
Recheck DTCs

DTC

Use ASIST to diagnosis and
repair DTCs

**Do Not Erase**

Step 7:
Confirm all SRTs
“COMPLETE”

All SRTs “COMPLETE”

END

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ITB98-011f

Step 1: Check for DTC
1. Use a CONSULT tool to check for any stored DTCs.
•

If any DTCs are stored they must be repaired at this time.

•

Refer to ASIST for diagnostic and repair information.
NOTE: Normal warranty coverage will apply for DTC repairs.

2. If no DTCs are stored, go to the next step.
NOTE: DO NOT touch “Erase” or you will lose previously completed SRTs.

Step 2: Check SRT Status
Check the SRT Status (Complete or Incomplete).
•

Use the appropriate CONSULT tool.

•

For older vehicles, a Generic Scan Tool may be needed to check SRT status.

NOTE: 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 SRTs. If this occurs, no further action is necessary.
Always check SRT status before performing the SRT Drive Pattern.

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ITB98-011f

Step 3: Identify the Vehicle
You must select the Drive Pattern that correctly corresponds with all variables for the vehicle being serviced:
Model__________________
Model Year______________
Engine_________________
Emissions certification______________________
•
•

Some models have different drive patterns depending on the emissions certification (i.e. California,
Federal, 50 State).
Check the under hood emissions label to determine the emissions certification for the vehicle being
inspected.

Transmission_____________________________
Powertrain (2WD or 4WD) ___________________
For 1996/1997 models, ECM part number)______________________________

Step 4: Obtain ECM Part Number (1996 and 1997 models only)
1. Use a CONSULT tool to obtain the ECM part number.
2. Write the ECM part number in the space provided above.
3. Compare the vehicles ECM part number with the list of ECM part numbers provided in the Infiniti SRT
System Chart (page 10) to determine the Drive Pattern for the vehicle being inspected.
NOTE: For 1996 and 1997 models; if the vehicles ECM part number 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.

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ITB98-011f

Step 5: SRT Road Test (perform Drive Pattern)
To properly obtain SRT readings of “COMPLETE,” it is necessary to drive the vehicle under the exact
conditions required by the vehicle’s ECM.
Be sure to select the correct Drive Pattern. The SRTs will not complete if the wrong drive pattern for
that vehicle is used.
1. Select the Drive Pattern based on the Vehicle Identification (see Step 3).
•

For 1996 and 1997 vehicles:
¾ This bulletin contains a specific Driving Pattern for every 1996 and 1997 Infiniti vehicle.
¾ Use the “Bookmark” on the left side of the ASIST screen to choose the correct model and year.
¾ Verify that the vehicle ECM P/N matches EXACTLY an ECM P/N listed on the Drive Pattern
sheet you chose.
¾ Print the Drive Pattern to take with you.

•

For 1998 and newer vehicles, refer to the EC section in the appropriate Service Manual for the required
Drive Pattern. It is listed under On-Board Diagnostics > System Readiness Test.
¾ Print the Drive Pattern to take with you.

2. Prior to driving the vehicle, review the Drive Pattern and prepare to complete it from start to finish:
•

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 that 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 the road test with less than ½ tank of fuel. If the fuel level is
greater than ½, more time may be required to complete the EVAP sections of the Drive Pattern and
you may not be able to add fuel as required.

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ITB98-011f

Step 5: SRT Road Test (continued)
3. Review the Drive Pattern for any input signals that need to be monitored during the drive.
•

If needed, Connect a CONSULT tool to the vehicle to monitor required signals.

NOTE:
•

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.”

•

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. Note the following items before starting the Drive Pattern:
•

IMPORTANT: Nissan requires 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”. For vehicles that require two trips, the pre-check engine coolant temperature
must be met before beginning Section 1 of the second trip.

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ITB98-011f

5. Perform the Drive Pattern:
a. Make sure all Pre-Check conditions are met.
b. Drive the vehicle and carefully follow the specific instructions and time requirements listed in each
section of the Drive Pattern.
NOTE: If you monitor the (B/FUEL SCHDL):
•

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 B/FUEL SCHDL value.

Step 6: Recheck for DTC
Upon completion of the Drive Pattern, determine if any DTCs have been stored. 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 for
diagnostic and repair information.
NOTE: Normal warranty coverage will apply for DTC repairs.

•

Once the DTC is repaired, erase the stored DTC. Turn the ignition OFF for 10 seconds, and then
repeat the entire Drive Pattern (Step 5) to “COMPLETE” the SRTs.

•

If no DTCs have been stored, DO NOT touch “Erase” or all SRT items will reset to “INCOMPLETE.”

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ITB98-011f

Step 7: Confirm All SRTs “COMPLETE”
If all SRT items indicate “COMPLETE,” the inspection is complete.
•

If Catalyst and/or O2 Sensor Monitors show “INCOMPLETE” perform step A or B below.
A. Check Self Learning Value (Long Term Fuel Trim (LTFT)) and A/F ALPHA (Short Term Fuel
Trim (STFT)). If either value is +10% or more above target of 100%, clear Self Learning Value.
•

Perform DTC diagnosis for P0171 or P0174 and check for the following possible causes:
¾
¾
¾
¾
¾
¾
¾

Intake air leaks
Front heated oxygen sensors
Injectors
Exhaust gas leaks
Incorrect fuel pressure
Lack of fuel
Mass air flow sensor

B. Check Self Learning Value (Long Term Fuel Trim (LTFT)) and A/F ALPHA (Short Term Fuel
Trim (STFT)). If either value is -10% or more below target of 100%, clear Self Learning Value.
•

Perform DTC diagnosis for P0172 or P0175 and check for the following possible causes:
¾
¾
¾
¾
¾
¾
¾

•

Intake air leaks
Front heated oxygen sensors
Injectors
Exhaust gas leaks
Incorrect fuel pressure
Lack of fuel
Mass air flow sensor

After repairs have been made, run the prescribed drive pattern and check that A/F ALPHA is within
±10% of the target of 100% during the steady state portions of the drive cycle. If it is not, then continue
repairs. If it is, return to STEP 5.

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ITB98-011f

Infiniti SRT System Chart
1 trip or 2 trip SRT
Model

Model
Year

G20

T/M

ECM Part No.23710-XXXXX

M/T

0J600
0J601, 0J602
0J610
0J611, 0J612
53U00, 53U01, 53U02, 53U03, 53U04, 53U06
53U10, 53U11, 53U12, 53U13, 53U14,
53U15, 53U16
54U00, 54U01, 54U02, 54U03, 54U04,
54U05, 54U06, 56U60, 56U61, 56U62,
56U64, 56U66
54U10, 54U11, 54U12, 54U13, 54U14,
54U15, 54U16, 56U70, 56U71, 56U72,
56U73, 56U74, 56U75, 56U76
0L700, 0L701, 0L702, 0L707, 0L708, 0L709,
0L760, 0L761, 0L762, 0L763, 0L767, 0L768,
0L769
0L710, 0L711, 0L712, 0L717, 0L718, 0L719,
0L770, 0L771, 0L772, 0L773, 0L777, 0L778,
0L779
18Y00, 18Y01
18Y61, 18Y62
18Y10, 18Y11, 18Y12, 18Y13, 18Y14
1W205, 1W206, 1W207, 1W208, 1W209,
1W265, 1W266, 1W204, 1W260, 1W203,
1W201, 1W200
68U04, 68U09, 68U10, 68U14, 68U19,
87U00, 87U01, 87U02, 87U03, 87U10,
87U11, 87U12, 87U13, 68U12
6P100, 6P101, 6P102, 6P103, 6P104, 6P106,
6P107, 6P600, 6P601, 6P602, 6P603, 6P604,
6P606, 6P607

‘96
A/T
I30
(Fed)

‘96

I30

M/T
A/T
M/T

(Cal)

‘96

A/T

I30

‘97

M/T
A/T

J30

‘96
A/T

QX4

‘97
‘97

A/T

Q45

‘96

A/T

Q45

‘97

A/T

Note:

Drive
Pattern
1
2
3
4
5
6

O2
Sensor
1 trip

Catalyst

EVAP

1 trip

O2
Heater
1 trip

1 trip

N/A

1 trip

1 trip

1 trip

1 trip

N/A

1 trip

1 trip

1 trip

1 trip

2 trip

2 trip

2 trip

2 trip

2 trip

2 trip

11
12
13
14