1999 Infiniti QX4FACTORY OEM SERVICE PROCEDURE

Setting SRT Codes

To set all SRT codes as complete, self diagnosis for the items specified must be performed one or more times. See appropriate SYSTEM READINESS TEST (SRT) CODE IDENTIFICATION table. With scan tool connected to Data Link Connector (DLC), start engine and allow vehicle to warm to operating temperature and coolant temperature greater than 158°F (70°C). Drive vehicle according to procedure shown in illustration. See Fig 1. Perform driving procedure one or more times. If driving procedure is interrupted, repeat procedure. On A/T models, operate vehicle with shift lever in "D" position and overdrive ON. On M/T models, shift gears at suggested speeds. See M/T SHIFT POINTS  table.

Fig 1: Setting System Readiness Test (SRT) Codes
G98C01294Courtesy of NISSAN MOTOR CO., U.S.A.
M/T SHIFT POINTS

Application Shift Speed MPH
Altima
Cruising Below 4000 Ft. Elevation
1-2 15
2-3 18
3-4 30
4-5 39
Acceleration Below 4000 Ft. Elevation
1-2 15
2-3 25
3-4 36
4-5 40
Quick Acceleration
1-2 15
2-3 25
3-4 40
4-5 45
Frontier 4-Cylinder
1-2 15
2-3 25
3-4 40
4-5 45
Frontier V6, Pathfinder & QX4
Cruising Below 4000 Ft. Elevation
1-2 15
2-3 18
3-4 30
4-5 39
Acceleration Below 4000 Ft. Elevation
1-2 15
2-3 25
3-4 36
4-5 40
Quick Acceleration
1-2 15
2-3 25
3-4 40
4-5 45
Maxima
Cruising Below 4000 Ft. Elevation
1-2 13
2-3 16
3-4 27
4-5 36
Acceleration Below 4000 Ft. Elevation
1-2 13
2-3 23
3-4 33
4-5 39
Quick Acceleration
1-2 15
2-3 25
3-4 40
4-5 45
Sentra
1-2 15
2-3 25
3-4 40
4-5 45
SYSTEM READINESS TEST (SRT) CODE IDENTIFICATION (ALTIMA, FRONTIER 4-CYL., QUEST & SENTRA)

Category/System Monitored DTC/(1) MIL Code
Catalyst System
Three Way Catalyst P0420/0702
EVAP System
EVAP Control System
Small Leak - Negative Pressure P0440/0705
Small Leak - Positive Pressure P1440/0213
Purge Flow P01447/0111
HO2S Sensor
Front HO2S
Circuit P0130/0303
Lean Shift P0131/0411
Rich Shift P0132/0410
Response P0133/0409
High Voltage P0134/0412
Rear HO2S
Minimum Voltage P0137/0511
Maximum Voltage P0138/0510
Response P0139/0707
High Voltage P0140/0512
HO2S Sensor Heater System
Front P0135/0901
Rear P0141/0902
EGR System
EGR Function
Closed P0400/0302
Open P1402/0514
EGRC-BPT Valve Function P0402/0306
(1) Malfunction Indicator Light (MIL) fault codes. See ENTERING SELF-DIAGNOSTICS.
SYSTEM READINESS TEST (SRT) CODE IDENTIFICATION (FRONTIER V6, MAXIMA, PATHFINDER & QX4)

Category/System Monitored DTC/(1) MIL Code
Catalyst System
Three Way Catalyst
Right Bank P0420/0702
Left Bank P0430/0703
EVAP System
EVAP Control System
Small Leak - Negative Pressure P0440/0705
Small Leak - Positive Pressure P1440/0213
Purge Flow P1447/0111
HO2S Sensor
Front HO2S
Circuit P0130/0503 & P0150/0303
Lean Shift P0131/0411 & P0151/0415
Rich Shift P0132/0410 & P0152/0414
Response P0133/0409 & P0153/0413
High Voltage P0134/0412 & P0154/0509
Rear HO2S
Minimum Voltage P0137/0511
Maximum Voltage P0138/0510
Response P0139/0707
High Voltage P0140/0512 & P0160/0315
HO2S Sensor Heater System
Front P0135/0901 & P0155/1001
Rear P0141/0902 & P0161/1002
EGR System
EGR Function
Closed P0400/0302
Open P1402/0514
EGRC-BPT Valve Function (2) P0402/0306
(1) Malfunction Indicator Light (MIL) fault codes. See ENTERING SELF-DIAGNOSTICS.
(2) Except Maxima.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.