Accessport & Accesstuner Data Monitors 
 

GT-R Engine Control Module (ECM) Data Monitors

Supported Applications:

• WM 2008-2016 (UDSM 2009-2017)

**Bolded Monitors indicate default data log parameter for Accessport.

Units: (standard, metric)

1. A/C System Pressure - (MPa) A/C system pressure.
2. A/F ALPHA (Avg. Learning) B1 - (%) – Average learned fuel correction bank 1.
3. A/F ALPHA (Avg. Learning) B2 - (%) – Average learned fuel correction bank 2.
4. A/F Ratio B1 - (AFR, Lambda) – Internal wide-band oxygen sensor bank 1. Actual AFR/Lambda reported by the ECU.
5. A/F Ratio B2 - (AFR, Lambda) – Internal wide-band oxygen sensor bank 2. Actual AFR/Lambda reported by the ECU.
6. Air Fuel B1 CMD – AFR/Lambda final request before compensations.
7. Air Fuel B2 CMD – AFR/Lambda final request before compensations.
8. Active Map Slot – (#) -Real time switchable map currently in use by the ECU (0-8)
9. Accelerator pedal Pos. – (%) Input from the driver.
10. Accelerator pedal Pos. Hijack – (%) Debug monitor for engine safety and rolling boost system. This is used to verify the throttle request during an engine safety event or rolling boost.
11. Barometric Pressure - A measure of atmospheric pressure
12. Battery Voltage – (V)
13. Clutch Torque - (nm, ft/lbs) - Output value from the clutch torque table, sent to the transmission control unit and affects clutch lock-up.
14. Coolant Temp - (deg. F, deg. C) – Engine coolant temperature.
15. Differential Fuel Pressure - (psig) - Fuel pressure minus manifold relative pressure (sea level), this is the effective pressure used for injector flow determination.
16. Differential Fuel Pressure Compensation - (%) - The amount of compensation applied by the differential fuel pressure compensation table.
17. Differential Fuel Pressure Error (PSI) - (psi error) - The amount of differential fuel pressure error in PSI as referenced against the base fuel pressure table.
18. Differential Fuel Pressure Error (Percent) - (% error) - The amount of differential fuel pressure error in % as referenced against the base fuel pressure table.
19. Dynamic Advance (DBA) - ( deg.) – monitor used for DBA ignition timing only. Degrees of advance added or subtracted due to current engine noise or detonation
20. End of injection Timing - (deg.) – Timing for end on injection in rotational degrees after top dead center.
21. Engine Oil Temp. – (Deg. F, Deg. C) – Engine oil temperature.
22. Engine Speed – (RPM) – Engine speed in revolutions per minute.
23. Ethanol % - (%) – Custom monitor for COBB Flex fuel. Reports ethanol content when fitted with appropriate hardware and enabled in map.
24. Enabled BOTL – (0-1) Custom monitor for COBB Boost off the line. When enabled this monitor will display a value of 1. If the system is not engaged it will display a value of 0.
25. Enabled ROLL – (0-1) Custom monitor for COBB Rolling Boost. When enabled and active this monitor will display a value of 1. If the system is not engaged it will display a value of 0.
26. Enabled SAFETY – (0-1) Custom monitor for COBB Engine Safety. When active (an active fault/failure state) this monitor will display a value of 1. If the system is not engaged it will display a value of 0.
27. Fuel Temp – (Deg. F, Deg. C) in tank Fuel Temperature.

28. Fuel Cut Flags - (raw) - These values represent any active cylinder fuel cuts. In the case of multiple simultaneous injection cuts, the values get added together. How to Read Compound Monitors

    Value	Description:
    1	Cylinder 1
    2	Cylinder 2
    4	Cylinder 3
    8	Cylinder 4
    16	Cylinder 5
    32	Cylinder 6
    Add	Multiple Cylinders

    
    

29. Fuel Pressure – (P.S.I., k.P.a.) Custom monitor for COBB Engine Safety/Fuel pressure. If an external senor is equipped, activated and calibrated, this will display current fuel pressure.
30. Fuel Pump (Sub) Status - (0-1) - The current active status of the oem secondary fuel pump.
31. Fuel Temperature Compensation - (%) - The amount of compensation applied by the fuel temperature compensation table.
32. Gear – Current active gear.
33. High Det. Flag (ON/OFF) – monitor that reports normal low detonation (0) or high detonation (1) conditions. Requires key cycle event to clear out high det. mode events.
34. Idle Speed Target - (RPM) Target idle speed
35. Ignition Timing – (deg.) – Ignition timing in degrees before top dead center. This is the final commanded ignition timing after all correction and adjustments.
36. Inj. Duty Cycle – (%) – Total injector pulse width as a percentage of available injector open time. If staged injection is active, this value will indicate the duty cycle the primary injectors would be at if the secondary injectors were not active.
37. Inj. Duty Cycle (Staged) - (%) - Total injector pulse width as a percentage of available injector open time. If staged injection is active, this value will indicate the current duty cycle that both the primary and secondary injectors are operating at.
38. Inj. Pulse Width Cyl 1-6 – (ms) – Total open time of fuel injector.
39. Inj. Pulse Width Cyl. 1-6 (Effective) - (ms) - Total injector open time minus latency, this is the effective time the injector is actually flowing fuel.
40. Inj. Pulse Width 1-6 Final (Post Compensation) - (ms) Final Inj. pulse width after all compensations. 
41. Inj. Pulsewidth Latency - (ms) - The current injector latency as calculated from the oem multiplier/offset tables or from the 3D Latency table when enabled.
42. Intake Air Temp. – (deg. F, deg. C) – Sensor value intake air temperature.
43. Intake Valve Timing (B1 and B2) – (deg.) – Position in degrees of variable intake camshaft.
44. ISC Accessory Load Airflow Compensation - (L/min) Additional airflow added to base airflow based off of power steering, A/C, and alternator loads. 
45. ISC Airflow Learning - (L/min) ISC airflow long term learned value. This value is initialized after reset to the value stored to eprom during a bank airflow learning procedure.
46. ISC A/C Airflow Compensation - (L/min) Additional airflow added to base airflow when A/C compressor is active. 
47. ISC Base Airflow - (L/min) Current base airflow calculation based on target idle speed. 
48. ISC Dashpot Airflow Compensation - (L/min) Additional airflow compensation applied immediately upon entering idle mode and decayed by dashpot airflow decay rate value. 
49. ISC Final Airflow - (L/min) Final idle speed control airflow request. 
50. ISC Integral Feedback Airflow - (L/min) Integral feedback airflow compensation. This is the primary feedback for idle airflow control. 
51. ISC Opening Area - (cm²) Calculated opening area based on ISC final airflow. This value will be added to requested opening area from requested torque. 
52. ISC Power Steering Airflow Compensation - (L/min) Additional airflow added to base airflow proportional to power steering sensor voltage. 
53. ISC Proportional Feedback Airflow - (L/min) Proportional feedback airflow compensation. This is only active when below idle speed target. 
54. Knock Cy 1-6 – (raw) - raw knock value from each cylinder
55. Knock Filter 1-6 – (raw) - knock sensitivity threshold level for each cylinder
56. Knock Sums (CBA) - (raw) – A monitor that reports active ignition timing adjustment in response to engine noise – an increment of 300 is equivalent to 1 degree of ignition removed. Used ONLY in CBA ignition strategy cars
57. Launch Control Fuel Compensation - (%) - The amount of fueling compensation applied by the launch control fuel compensation table while in launch mode.  
58. Launch Control RPM Error - (RPM) - The amount of launch control engine speed target error.
59. Launch Control Status - (0-1) - The current active status of the launch control system.

60. Limp Status (Safety) – Custom monitor for COBB Engine Safety. This is currently a compound monitor, allowing you to see all failure state causes in a single monitor.How to Read Compound Monitors

    Code	Description:
    00	OK
    01	Fuel Pressure Failure
    02	STFT Failure
    04	Oil Temp Failure
    08	Coolant Temp Failure
    16	Knock Failure

    Examples:

    A failure of the fuel pressure system and knock at the same time would produce a value of 17 (1+16)

    A failure of the cooling system temp and knock at the same time would produce a value of 24 (8+16)

    A failure of the STFT and oil pressure at the same time would produce a value of 34 (32+2)

61. LTFT (KBLRC) B1 – (%) - Long-Term Fuel Trim Bank 1. This long-term fuel trim indicates an average learned fuel correction needed to maintain the closed loop target for Bank 1.
62. LTFT (KBLRC) B2 – (%) - Long-Term Fuel Trim Bank 2. This long-term fuel trim indicates an average learned fuel correction needed to maintain the closed loop target for Bank 2.
63. MAF Bank 1 – Mass air flow sensor output in g/s for Bank 1.
64. MAF Bank 2 – Mass air flow sensor output in g/s for Bank 2.
65. MAF Total – Total airflow in grams per second for bank A and B (A+B/2)
66. MAF V Bank 1 – (V) - Mass air flow sensor output voltage for Bank 1.
67. MAF V Bank 2 – (V) - Mass air flow sensor output voltage for Bank 2.
68. MAP – (PSI, kPa) -Manifold Absolute Pressure (reported as negative values in vacuum and positive values in boost) – logged from pressure sensor in the intake manifold.
69. MAP Driver Pre Voltage – (V) - Voltage reading for the pre-throttle body boost pressure sensor. Alternately, shows the voltage reading for fuel pressure sensor if vehicle is outfitted with aftermarket fuel pressure sensor (Used for fuel pressure sensor debugging) – logged from the driver's side (left) pre-throttle body pressure sensor. Use "Turbo Boost Pressure Left" for sensor pressure readings.
70. MAP Pass Pre Voltage  – (V) - Voltage reading for the pre-throttle body boost pressure sensor. Alternately, shows the voltage reading for fuel pressure sensor if vehicle is outfitted with aftermarket fuel pressure sensor (Used for fuel pressure sensor debugging) – logged from the passenger side (right) pre-throttle body pressure sensor. Use "Turbo Boost Pressure Right" for sensor pressure readings.
71. Max negative dynamic advance (DBA) – (deg.) – largest negative DA currently recorded in ECU memory
72. Non Linear Pulsewidth Compensation - (%) - The amount of compensation applied by the non-linear pulsewidth compensation table.
73. Per Cylinder Injector 1-6 Compensation - (%) - The amount of compensation applied by the corresponding per cylinder injector compensation table.
74. Power Steering Pressure Sensor Volts - (V) Voltage reported from power steering pressure sensor. 
75. STFT (ALPHA) B1 – (%) - Active short-term fuel trim for bank 1 needed for the ECU to meet fuel targets in fuel table A.
76. STFT (ALPHA) B2 – (%) - Active short-term fuel trim for bank 2 needed for the ECU to meet fuel targets in fuel table A.
77. Staged Injection Airmass Ratio - (%) - Percentage of airmass being combusted by fuel injected from the secondary injectors.
78. Staged Injection Corrected Lambda - (AFR/Lambda) - When multi-fuel is enabled, this value will represent the final closed loop target lambda based on standard commanded lambda and staged injection secondary commanded lambda.
79. Staged Injection Cycle Counter - (Engine Cycles) - Number of engine cycles that have taken place since the staged injection system has activated or deactivated.
80. Staged Injection Secondaries Active Status - (0-1) - Current active status of the secondary injectors.
81. Staged Injection Secondary Injection Latency - (ms) - The current secondary injector latency as calculated from the Secondary Injector Latency table.
82. Staged Injection Secondary Lambda - (AFR/Lambda) - When multi-fuel is enabled, this represents the commanded lambda used by the secondary injector fueling calculations as looked up in the Secondary Fuel Commanded Lambda (Multi-Fuel) table.
83. Staged Injection Staged Pulsewidth - (ms) - Injector pulsewidth as it would be when secondary injectors are active, this value is calculated whether secondary injection is active or not.

84. Staged Injection Threshold Flags - (raw) - Current status of all staged injection activation thresholds, when multiple thresholds have been exceeded their values are added together.How to Read Compound Monitors

    Value	Description:
    01	Engine Speed Threshold
    02	Boost Threshold
    04	Engine Load Threshold
    08	Injector Duty Cycle Threshold
    16	Minimum Staged Inj. Pulsewidth
    Add	Multiple Thresholds

    
    

85. Staged Injection Transition Compensation - (%) - Fuel compensation currently being applied by the staged injection transition compensation system, this value is pulled from either the Transition Compensation (Staging) or (De-staging) table.
86. Start of injection Timing – (deg. ) - Timing for end on injection in rotational degrees after top dead center.
87. Theoretical Pulse Width - (ms) – Load calculation based upon theoretical injector open time. This is used as load axis scaling for several critical tables throughout the ECU.
88. Throttle Angle B1 (Actual) - (deg.) Degrees of opening angle for bank 1 throttle body. 
89. Throttle Angle B1 (Target) - (deg.) Degrees of opening angle targeted for bank 1 throttle body. 
90. Throttle Angle B2 (Actual) - (deg.) Degrees of opening angle for bank 2 throttle body. 
91. Throttle Angle B2 (Target) - (deg.) Degrees of opening angle targeted for bank 2 throttle body. 
92. Throttle Opening Airflow Factor - (Factor) - Value used as an x-axis lookup for the wall film adhesion factor table.
93. Throttle Opening Area - (cm²) - Opening area per throttle body, includes requested torque opening area added to idle speed control opening area.
94. Throttle Position B1  – (%) – throttle plate opening 0 to 100%
95. Throttle Position and B2 – (%) – throttle plate opening 0 to 100%
96. TPS Volts B1 (Main Sensor) - (V) Throttle position sensor voltage Bank 1 (main sensor)
97. TPS Volts B1 (Sub. Sensor) - (V) Throttle position sensor voltage Bank 1 (main sensor error checking)
98. TPS Volts B2 (Main Sensor) - (V) Throttle position sensor voltage Bank 2 (main sensor)
99. TPS Volts B2 (Sub. Sensor) - (V) Throttle position sensor voltage Bank 2 (main sensor error checking)
100. Trans. Req Tq1 – (raw)
101. Trans. Req. Tq2 – (raw)
102. Turbo Boost Pressure Left - (PSI, kPa) – Boost pressure on left side of motor - sensor located in front of left throttle body.
103. Turbo Boost Pressure Right – (PSI, kPa) – Boost pressure on right side of motor - sensor located in front of right throttle body.
104. Vehicle speed – (mph, kph) - Speed calculated by vehicle speed sensor.
105. Wall Film Adhesion Factor - (Factor) - Final wall film adhesion factor value after being compensated by the wall film adhesion compensation (RPM) table output.
106. Wastegate Duty – (%) - Percentage of boost control wastegate solenoid duty cycle % (0 to 100).
107. Wheel Speed (FL, FR, RL, RR) – (MPH, KPH) Individual wheel speeds. (Front Left, Front Right, Right Left, Right Rear)

GT-R Transmission Control Module (TCM) Data Monitors

Note: TCM Logging is only available on the V3 Accessport

Supported TCM Applications:

• Gen 1 - LC3
• Gen 1 - LC4
• Gen 1 - LC5
• Gen 2 – LC1
• Gen 2 – LC2

1. 1-R Position Sensor 1 – (mV) - Sensor Voltage Measurement
2. 1-R Position Sensor 2 – (mV) - Sensor Voltage Measurement
3. 2-4 Position Sensor - (mV) - Sensor Voltage Measurement
4. 3-5 Position Sensor - (mV) - Sensor Voltage Measurement
5. 6-N Position Sensor - (mV) - Sensor Voltage Measurement
6. ACC/TPS Switch - ACC/TPS full throttle flag
7. Acceleration Estimate - RAW Value - unk
8. Accelerator Pedal Position 1 – (%) - Driver pedal position
9. Accelerator Pedal Position 2 – (%) - Driver pedal position
10. Axis A Pressure Target – (bar) - Axis A feed pressure target
11. Axis B Pressure Target – (bar) - Axis A feed pressure target
12. Battery Voltage TCM - (V) - Actual supply voltage available at transmission/TCM
13. Brake Switch - brake pedal related
14. Braking Force – (raw) - Braking force is directly proportional to brake pedal position or brake pressure from ABS
15. Clutch A Flags - Clutch A status flags
16. Clutch A Pressure – (bar) - Actual pressure applied to clutch A
17. Clutch A Pressure Sensor – (mV) - Clutch A pressure sensor voltage measurement
18. Clutch A Pressure Target – (bar) - Clutch A pressure target
19. Clutch A Rest Pressure - (bar) - Pressure in clutch when not active
20. Clutch A Slip - RPM - Clutch slip as measured
21. Clutch A Speed - (RPM) - Current RPM of clutch pack
22. Clutch A Target Pressure Learned Adj - (bar) - Learned pressure offset for intended clutch operation
23. Clutch A Temp – (deg. C) - (estimated) - This is a number derived from software modelling to simulate the actual clutch temperature
24. Clutch A Torque Input - (Nm) - Torque applied to clutch A
25. Clutch A Torque Loss - (Nm) - Torque Lost at clutch A
26. Clutch A Torque Output - (Nm) - Total torque output from clutch A after losses and slippage
27. Clutch A Touch Pressure - (bar) - Related to touch points??
28. Clutch B Flags - Clutch B status flags
29. Clutch B Pressure - (bar) - Actual pressure applied to clutch B
30. Clutch B Pressure Sensor - (mV) - Clutch B pressure sensor voltage measurement
31. Clutch B Pressure Target - (bar) - Clutch B pressure target
32. Clutch B Rest Pressure - (bar) - Pressure in clutch when not active
33. Clutch B Slip - (RPM) - Clutch slip as measured
34. Clutch B Speed - (RPM) - Current RPM of clutch pack
35. Clutch B Target Pressure Learned Adj - (bar) - Learned pressure offset for intended clutch operation
36. Clutch B Temp – (deg.C) - (estimated) - This is a number derived from software modelling to simulate the actual clutch temperature
37. Clutch B Torque Input - (Nm) - Torque applied to clutch B
38. Clutch B Torque Loss - (Nm) - Torque lost at clutch B
39. Clutch B Torque Output - (Nm) - Total torque output from clutch A after losses and slippage
40. Clutch B Touch Pressure – (bar) - Related to touch points??
41. Clutch Speed Active - (RPM) - Actual clutch speed of the currently active clutch pack
42. Clutch Speed Passive - (RPM) - Actual clutch speed of the inactive clutch pack
43. Comm Axis A S/V – (%) - Axis A feed pressure solenoid valve
44. Comm Axis B S/V- (%) - Axis B feed pressure solenoid valve
45. Comm Clutch A S/V - (%) - Clutch A solenoid valve duty cycle
46. Comm Clutch B S/V - (%) - Clutch B solenoid valve duty cycle
47. Comm Line Press S/V - (%) - Line pressure solenoid valve duty cycle
48. Comm Lube S/V - (%) - Lubrication pressure solenoid valve duty cycle
49. Comm S/V Flags - Solenoid valve status indication flags
50. Cornering Force - Lateral Gravitational Force Equivalent
51. ECM TQ Limit(Ignition) Request - (Nm) - Torque reduction request from ECM using ignition timing
52. ECM TQ Limit(Throttle) Request - (Nm) - Torque reduction request from ECM using Throttle
53. Engaged Clutch Speed - (RPM) - Actual Engaged clutch speed (A or B)
54. Engine Idle Speed - (RPM) - Engine idle speed set point from ECM
55. Engine RPM 02 - RPM - Matches engine rpm
56. Engine Torque Output - Torque output from motor
57. Fluid Temp – (deg. C) - Transmission fluid temperature
58. Fluid Temp Sensor - (mV) - Transmission fluid temperature sensor voltage
59. Gear Pos - (0-Declutched at rest 1-1st Gear 2-2nd Gear 3-3rd Gear 4-4th Gear 5-5th Gear 6-6th Gear 9-Reverse 10-Neutral)
60. Gear Pos Indication 0 - (1-1st Gear 2-2nd Gear 3-3rd Gear 4-4th Gear 5-5th Gear 6-6th)
61. Gear Pos Indication 1 - (0-Declutched at rest 1-1st Gear 2-2nd Gear 3-3rd Gear 4-4th Gear 5-5th Gear 6-6th Gear 9-Reverse 10-Neutral)
62. Gear Pos Offset - Gear position offset
63. Gear Pos Previous - Gear transmission was previously in
64. Gear Pos Target - Next target gear
65. Launch/Park/Paddle Flags - Status flags related to driver input
66. Line Pressure - (bar) - Transmission line pressure
67. Line Pressure Sensor - (mV) - Transmission line pressure sensor voltage
68. Line Pressure Target - (bar) - Target transmission line pressure
69. Lube Pressure Target - (bar) - Target transmission lube pressure
70. Mode - Driver Mode Selection (0-Normal 1-Snow 2-Automatic Sport 3-Manual Sport 4-Manual Circuit)
71. Mon Axis A S/V - (%) - Axis A feed pressure solenoid valve duty cycle
72. Mon Axis B S/V - (%) - Axis B feed pressure solenoid valve duty cycle
73. Mon Clutch A S/V - (%) - Clutch A pressure regulation solenoid valve duty cycle
74. Mon Clutch B S/V - (%) - Clutch B pressure regulation solenoid valve duty cycle
75. Mon Line Press S/V - (%) - Line pressure solenoid valve duty cycle
76. Mon Lube S/V - (%) - Lube pressure solenoid valve duty cycle
77. Mon S/V Flags - Solenoid valve operation flags
78. Output Shaft Speed- (RPM) - Speed of transmission output shaft
79. Paddle Flags 0 – Driver Paddle Flags
80. Paddle Flags 1 - Shift paddle flags (8, normal 4, upshift 0, downshift)
81. Paddle Flags 2 – Driver Paddle Flags
82. Paddle Input - Driver shift paddle input (up or down)
83. Paddle Input Up/Down - Driver Paddle input
84. R/S Mode Lamps - Unknown
85. Range - (3-M Range 4-D Range 5-N Range 6-R Range 7-P Range)
86. Reverse Lamps - Reverse Lamp Operation status
87. Shift Solenoid Flags - Shift solenoid status flags
88. Sleeve A1 position - (mm) - Position of sleeve A1 in millimeters
89. Sleeve A2 position - (mm) - Position of sleeve A2 in millimeters
90. Sleeve B1 Sensor 1 Position - (mm) - Position of sleeve B1 sensor 1 in millimeters
91. Sleeve B1 Sensor 2 Position - (mm) - Position of sleeve B1 sensor 2 in millimeters
92. Sleeve B2 Position - (mm) - Position of sleeve B2 in millimeters
93. Start Relays/Ign Sw Flags - Ignition switch, backup relay, starter and neutral switch flag indicator
94. Stop Lamps - Stop lamp switch flag
95. Target Engaged Clutch Speed – (RPM) - Expected Engaged clutch speed (changes when gear shift is requested)
96. TR Sensor A/M - Automatic/Manual transmission mode indicator
97. Torque Available - (Nm) - Engine Torque Available (calculated)
98. Torque Demanded- (Nm) - Engine Torque Requested
99. Torque Raw - (Nm) - Engine Torque Unknown
100. Torque Reduction Reason - Reason for torque reduction flags
101. Torque Supplied - (Nm) - Actual torque applied to transmission
102. Transmission Torque - (Nm) - Unknown
103. Vehicle RPM TCM 0 - (RPM) - Value from CAN-BUS
104. Vehicle RPM TCM 1 - (RPM) - Physical signal measurement
105. Vehicle Speed 0 (km/h) Value from CAN-BUS
106. Vehicle Speed 1 (km/h) Physical signal measurement