Monitored Item

WARNING: This page is about a different car, the 2004 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

x: Applicable

DATA MONITOR MODE MONITORED ITEM

Monitored item [Unit]	ECM INPUT SIGNALS	MAIN SIGNALS	Description	Remarks
ENG SPEED [rpm]	x	x	Indicates the engine speed computed from the signals 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]	x	x	The signal voltage of the mass air flow sensor is displayed.	When the engine is stopped, a certain value is indicated.
B/FUEL SCHDL [msec]		x	"Base fuel schedule" indicates the fuel injection pulse width programmed into ECM, prior to any learned on board correction.
AF ALPHA-B1 [%]		x	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. This data also includes the data for the air-fuel ratio learning control.
AF ALPHA-B2 [%]		x
COOLAN TEMP/S [°C] or [°F]	x	x	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]	x	x	The A/F signal computed from the input signal of the A/F sensor 1 is displayed.
AF SEN1 (B2) [V]	x
HO2S2 (B1) [V]	x		The signal voltage of the heated oxygen sensor 2 is displayed.
HO2S2 (B2) [V]	x
HO2S2 MNTR (B1) [RICH/LEAN]	x		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]	x			When the engine is stopped, a certain value is indicated.
VHCL SPEED SE [km/h] or [mph]	x	x	The vehicle speed computed from the vehicle speed signal sent from combination meter is displayed.
BATTERY VOLT [V]	x	x	The power supply voltage of ECM is displayed.
ACCEL SEN 1 [V]	x	x	The accelerator pedal position sensor signal voltage is displayed.	ACCEL SEN 2 signal is converted by ECM internally. Thus, it differ from ECM terminal voltage signal.
ACCEL SEN 2 [V]	x
THRTL SEN 1 [V]	x	x	The throttle position sensor signal voltage is displayed.	THRTL SEN 2 signal is converted by ECM internally. Thus, it differ from ECM terminal voltage signal.
THRTL SEN 2 [V]	x		The throttle position sensor signal voltage is displayed.
FUEL T/TEMP SE [°C] or [°F]	x		The fuel temperature (determined by the signal voltage of the fuel tank temperature sensor) is displayed.
INT/A TEMP SE [°C] or [°F]	x	x	The intake air temperature (determined by the signal voltage of the intake air temperature sensor) is indicated.
EVAP SYS PRES [V]	x		The signal voltage of EVAP control system pressure sensor is displayed.
FUEL LEVEL SE [V]	x		The signal voltage of the fuel level sensor is displayed.
START SIGNAL [ON/OFF]	x	x	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]	x	x	Indicates idle position [ON/OFF] computed by ECM according to the accelerator pedal position sensor signal.
AIR COND SIG [ON/OFF]	x	x	Indicates [ON/OFF] condition of the air conditioner switch as determined by the air conditioner signal.
P/N POSI SW [ON/OFF]	x	x	Indicates [ON/OFF] condition from the park/neutral position (PNP) switch signal.
PW/ST SIGNAL [ON/OFF]	x	x	[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]	x	x	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]	x		Indicates [ON/OFF] condition from ignition switch signal.
HEATER FAN SW [ON/OFF]	x		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]		x	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]		x	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.m/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]			Indicates [°CA] of intake camshaft advanced angle.
INTV SOL (B1) [%]			The control value 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) [%]
AIR COND RLY [ON/OFF]		x	The air conditioner relay control condition (determined by ECM according to the input signals) is indicated.
FUEL PUMP RLY [ON/OFF]		x	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 turbine revolution sensor signal.
VEHICLE SPEED [km/h] or [MPH]			Indicates the vehicle speed computed from the revolution sensor signal.
IDL A/V LEARN [YET/CMPLT]			Display 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.
SNOW MODE SW [ON/OFF]			Indicates [ON/OFF] condition from the snow mode switch signal.
A/F S1 HTR (B1) [%]			Indicates 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 ON/OFF (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 ACCEL/RESUME switch signal.
SET SW [ON/OFF]			Indicates [ON/OFF] condition from COAST/SET switch signal.
BRAKE SW1 [ON/OFF]			Indicates [ON/OFF] condition from ASCD brake switch signal, and ASCD clutch switch signal (M/T models).
BRAKE SW2 [ON/OFF]			Indicates [ON/OFF] condition of stop lamp switch signal.	v
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.
Voltage [V]			Voltage, frequency, duty cycle or pulse width measured by the probe.	Only "#" is displayed if item is unable to be measured. Figures with "#"s are temporary ones. They are the same figures as an actual piece of data which was just previously measured.
Frequency [msec], [Hz] or [%]
DUTY-HI
DUTY-LOW
PLS WIDTH-HI
PLS WIDTH-LOW

NOTE: Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.