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Home >> Lexus >> 2007 >> LS 460 >> Repair and Diagnosis >> External Pages >> Different car >> Section 794 (Engine Control System - Introduction (VQ40DE)) >> System Description >> Diagnosis System (ECM) >> Diagnosis Description >> CONSULT Function >> Data Monitor Mode
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Data Monitor Mode

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Monitored Item

Monitored item Unit Description Remarks
ENG SPEED RPM
  • Indicates the engine speed computed from the signal of the crankshaft position sensor (POS) and camshaft position sensor (PHASE).
  • Accuracy becomes poor if engine speed drops below the idle RPM.
  • If the signal is interrupted while the engine is running, an abnormal value may be indicated.
MAS A/F SE-B1 V
  • The signal voltage of the mass air flow sensor is displayed.
  • When the engine is stopped, a certain value is indicated.
  • When engine is running specification range is indicated in "SPEC".
B/FUEL SCHDL ms
  • "Base fuel schedule" indicates the fuel injection pulse width programmed into ECM, prior to any learned on board correction.
  • When engine is running specification range is indicated in "SPEC".
A/F ALPHA-B1 %
  • The mean value of the air-fuel ratio feedback correction factor per cycle is indicated.
  • When the engine is stopped, a certain value is indicated.
  • When engine is running specification range is indicated in "SPEC".
  • This data also includes the data for the air-fuel ratio learning control.
A/F ALPHA-B2 %
COOLAN TEMP/S °C or °F
  • The engine coolant temperature (determined by the signal voltage of the engine coolant temperature sensor) is displayed.
  • When the engine coolant temperature sensor is open or short-circuited, ECM enters fail-safe mode. The engine coolant temperature determined by the ECM is displayed.
A/F SEN1 (B1) V
  • The A/F signal computed from the input signal of the Air fuel ratio (A/F) sensor 1 is displayed.
  
A/F SEN1 (B2) V
HO2S2 (B1) V
  • The signal voltage of the heated oxygen sensor 2 is displayed.
  
HO2S2 (B2) V
HO2S2 MNTR(B1) RICH/LEAN
  • Display of heated oxygen sensor 2 signal:

    RICH: Means the amount of oxygen after three way catalyst is relatively small.

    LEAN: Means the amount of oxygen after three way catalyst is relatively large.
  • When the engine is stopped, a certain value is indicated.
HO2S2 MNTR(B2) RICH/LEAN
VHCL SPEED SE km/h or mph
  • The vehicle speed computed from the vehicle speed signal sent from combination meter is displayed.
  
BATTERY VOLT V
  • The power supply voltage of ECM is displayed.
  
ACCEL SEN 1 V
  • The accelerator pedal position sensor signal voltage is displayed.
  • ACCEL SEN 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.
ACCEL SEN 2 V
TP SEN 1-B1 V
  • The throttle position sensor signal voltage is displayed.
  • THRTL SEN 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.
TP SEN 2-B1 V
FUEL T/TMP SE °C or °F
  • The fuel temperature (determined by the signal voltage of the fuel tank temperature sensor) is displayed.
  
INT/A TEMP SE °C or °F
  • The intake air temperature (determined by the signal voltage of the intake air temperature sensor) is indicated.
  
EVAP SYS PRES V    
FUEL LEVEL SE V    
START SIGNAL ON/OFF
  • Indicates start signal status [ON/OFF] computed by the ECM according to the signals of engine speed and battery voltage.
  • After starting the engine, [OFF] is displayed regardless of the starter signal.
CLSD THL POS ON/OFF
  • Indicates idle position [ON/OFF] computed by ECM according to the accelerator pedal position sensor signal.
  
AIR COND SIG ON/OFF
  • Indicates [ON/OFF] condition of the air conditioner switch as determined by the air conditioner signal.
  
P/N POSI SW ON/OFF
  • Indicates [ON/OFF] condition from the park/neutral position (PNP) signal.
  
PW/ST SIGNAL ON/OFF
  • [ON/OFF] condition of the power steering system (determined by the signal voltage of the power steering pressure sensor signal) is indicated.
  
LOAD SIGNAL ON/OFF
  • Indicates [ON/OFF] condition from the electrical load signal.

    ON: Rear window defogger switch is ON and/or lighting switch is in 2nd position.

    OFF: Both rear window defogger switch and lighting switch are OFF.

  
IGNITION SW ON/OFF
  • Indicates [ON/OFF] condition from ignition switch signal.
  
HEATER FAN SW ON/OFF
  • Indicates [ON/OFF] condition from the heater fan switch signal.
  
BRAKE SW ON/OFF
  • Indicates [ON/OFF] condition from the stop lamp switch signal.
  
INJ PULSE-B1 msec
  • Indicates the actual fuel injection pulse width compensated by ECM according to the input signals.
  • When the engine is stopped, a certain computed value is indicated.
INJ PULSE-B2 msec
IGN TIMING BTDC
  • Indicates the ignition timing computed by ECM according to the input signals.
  • When the engine is stopped, a certain value is indicated.
CAL/LD VALUE %
  • Calculated load value indicates the value of the current air flow divided by peak air flow.
  
MASS AIRFLOW g/s
  • Indicates the mass air flow computed by ECM according to the signal voltage of the mass air flow sensor.
  
PURG VOL C/V %
  • Indicates the EVAP canister purge volume control solenoid valve control value computed by the ECM according to the input signals.
  • The opening becomes larger as the value increases.
  
INT/V TIM(B1) °CA
  • Indicates [°CA] of intake camshaft advanced angle.
  
INT/V TIM(B2) °CA
INT/V SOL(B1) %
  • The control condition of the intake valve timing control solenoid valve (determined by ECM according to the input signals) is indicated.
  • The advance angle becomes larger as the value increases.
  
INT/V SOL(B2) %
VIAS S/V-1 ON/OFF
  • The control condition of the VIAS control solenoid valve (determined by ECM according to the input signals) is indicated.

    ON: VIAS control solenoid valve is operating.

    OFF: VIAS control solenoid valve is not operating.

  
AIR COND RLY ON/OFF
  • The air conditioner relay control condition (determined by ECM according to the input signals) is indicated.
  
FUEL PUMP RLY ON/OFF
  • Indicates the fuel pump relay control condition determined by ECM according to the input signals.
  
VENT CONT/V ON/OFF
  • The control condition of the EVAP canister vent control valve (determined by ECM according to the input signals) is indicated.

    ON: Closed

    OFF: Open

  
THRTL RELAY ON/OFF
  • Indicates the throttle control motor relay control condition determined by the ECM according to the input signals.
  
COOLING FAN HI/LOW/OFF
  • The control condition of the cooling fan (determined by ECM according to the input signals) is indicated.

    HI: High speed operation

    LOW: Low speed operation

    OFF: Stop

  
HO2S2 HTR (B1) ON/OFF
  • Indicates [ON/OFF] condition of heated oxygen sensor 2 heater determined by ECM according to the input signals.
  
HO2S2 HTR (B2) ON/OFF
I/P PULLY SPD RPM
  • Indicates the engine speed computed from the input speed sensor signal.
  
VEHICLE SPEED km/h or mph
  • Indicates the vehicle speed computed from the output speed sensor signal.
  
IDL A/V LEARN YET/CMPLT
  • Displays the condition of idle air volume learning

    YET: Idle air volume learning has not been performed yet.

    CMPLT: Idle air volume learning has already been performed successfully.

  
TRVL AFTER MIL km or mile
  • Distance traveled while MIL is activated.
  
A/F S1 HTR(B1) %
  • Air fuel ratio (A/F) sensor 1 heater control value computed by ECM according to the input signals.
  • The current flow to the heater becomes larger as the value increases.
  
A/F S1 HTR(B2) %
AC PRESS SEN V
  • The signal voltage from the refrigerant pressure sensor is displayed.
  
VHCL SPEED SE km/h or mph
  • The vehicle speed computed from the vehicle speed signal sent from TCM is displayed.
  
SET VHCL SPD km/h or mph
  • The preset vehicle speed is displayed.
  
MAIN SW ON/OFF
  • Indicates [ON/OFF] condition from MAIN switch signal.
  
CANCEL SW ON/OFF
  • Indicates [ON/OFF] condition from CANCEL switch signal.
  
RESUME/ACC SW ON/OFF
  • Indicates [ON/OFF] condition from RESUME/ACCELERATE switch signal.
  
SET SW ON/OFF
  • Indicates [ON/OFF] condition from SET/COAST switch signal.
  
BRAKE SW1 ON/OFF
  • Indicates [ON/OFF] condition from ASCD brake switch signal.
  
BRAKE SW2 ON/OFF
  • Indicates [ON/OFF] condition of stop lamp switch signal.
  
VHCL SPD CUT NON/CUT
  • Indicates the vehicle cruise condition.

    NON: Vehicle speed is maintained at the ASCD set speed.

    CUT: Vehicle speed increased to excessively high compared with the ASCD set speed, and ASCD operation is cut off.

  
LO SPEED CUT NON/CUT
  • Indicates the vehicle cruise condition.

    NON: Vehicle speed is maintained at the ASCD set speed.

    CUT: Vehicle speed decreased to excessively low compared with the ASCD set speed, and ASCD operation is cut off.

  
AT OD MONITOR ON/OFF
  • Indicates [ON/OFF] condition of A/T O/D according to the input signal from the TCM.
  
AT OD CANCEL ON/OFF
  • Indicates [ON/OFF] condition of A/T O/D cancel signal sent from the TCM.
  
CRUISE LAMP ON/OFF
  • Indicates [ON/OFF] condition of CRUISE lamp determined by the ECM according to the input signals.
  
SET LAMP ON/OFF
  • Indicates [ON/OFF] condition of SET lamp determined by the ECM according to the input signals.
  
ALT DUTY %
  • Indicates the duty ratio of the power generation command value. The ratio is calculated by ECM based on the battery current sensor signal.
  
BAT CUR SEN mV
  • The signal voltage of battery current sensor is displayed.
  
ALT DUTY SIG ON/OFF
  • The control condition of the power generation voltage variable control (determined by ECM according to the input signals) is indicated.

    ON: Power generation voltage variable control is active

    OFF: Power generation voltage variable control is inactive.

  
A/F ADJ-B1 -
  • Indicates the correction factor saved in ECM. The factor is calculated from the difference between the target air-fuel ratio saved in ECM and the air-fuel ratio calculated from A/F sensor 1 signal.
  
A/F ADJ-B2 --
EVAP LEAK DIAG YET/CMPLT
  • Indicates the condition of EVAP leak diagnosis.

    YET: EVAP leak diagnosis has not been performed yet.

    CMPLT: EVAP leak diagnosis has been performed successfully.

  
EVAP DIAG READY ON/OFF
  • Indicates the ready condition of EVAP leak diagnosis.

    ON: Diagnosis has been ready condition.

    OFF: Diagnosis has not been ready condition.

  
HO2 S2 DIAG1(B1) INCMP/CMPLT
  • Indicates DTC P0139 self-diagnosis (delayed response) condition.

    INCMP: Self-diagnosis is incomplete.

    CMPLT: Self-diagnosis is complete.

  
HO2 S2 DIAG1(B2) INCMP/CMPLT
  • Indicates DTC P0159 self-diagnosis (delayed response) condition.

    INCMP: Self-diagnosis is incomplete.

    CMPLT: Self-diagnosis is complete.

  
HO2 S2 DIAG2(B1) INCMP/CMPLT
  • Indicates DTC P0139 self-diagnosis (slow response) condition.

    INCMP: Self-diagnosis is incomplete.

    CMPLT: Self-diagnosis is complete.

  
HO2 S2 DIAG2(B2) INCMP/CMPLT
  • Indicates DTC P0159 self-diagnosis (slow response) condition.

    INCMP: Self-diagnosis is incomplete.

    CMPLT: Self-diagnosis is complete.

  
THRTL STK CNT B1(1) - -  
(1) The item is indicated, but not used.
NOTE: Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
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