CONSULT-III Function

FUNCTION

DIAGNOSTIC TEST MODE CHART

Diagnostic test mode

Function

Work support

This mode enables a technician to adjust some devices faster and more accurately by following the indications on the CONSULT-III screen.

Self diagnostic result

Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data can be read and erased quickly.⁽¹⁾

Data monitor

Input/Output data in the ECM can be read.

Active test

Diagnostic Test Mode in which CONSULT-III drives some actuators apart from the ECMs and also shifts some parameters in a specified range.

DTC & SRT confirmation

The status of system monitoring tests and the self-diagnosis status/results can be confirmed.

Function test

This mode is used to inform customers when their vehicle condition requires periodic maintenance.

ECU Identification

ECM part number can be read.

⁽¹⁾	The following emission-related diagnostic information is cleared when the ECM memory is erased.

Diagnostic trouble codes
1st trip diagnostic trouble codes
Freeze frame data
1st trip freeze frame data
System readiness test (SRT) codes
Test values

WORK SUPPORT MODE

Work Item

WORK SUPPORT MODE CHART

Work item

Condition

Usage

FUEL PRESSURE RELEASE

Fuel pump will stop by touching "START" during idling. Crank a few times after engine stalls.

When releasing fuel pressure from fuel line

IDLE AIR VOL LEARN

The idle air volume that keeps the engine within the specified range is memorized in ECM.

When learning the idle air volume

SELF-LEARNING CONT

The coefficient of self-learning control mixture ratio returns to the original coefficient.

When clearing mixture ratio self-learning value

EVAP SYSTEM CLOSE

Close the EVAP canister vent control valve in order to make EVAP system close under the following conditions.

Ignition switch ON
Engine not running
Ambient temperature is above 0°C (32°F).
No vacuum and no high pressure in EVAP system
Fuel tank temp. is more than 0°C (32°F).
Within 10 minutes after starting "EVAP system close"
When trying to execute "EVAP system close" under the condition except above, CONSULT-III will discontinue it and display appropriate instruction.
NOTE: When starting engine, CONSULT-III may display "Battery voltage is low. Charge battery", even in using charged battery.

When detecting EVAP vapor leak point of EVAP system

VIN REGISTRATION

In this mode, VIN is registered in ECM.

When registering VIN in ECM

TARGET IDLE RPM ADJ⁽¹⁾

Idle condition

When setting target idle speed

TARGET IGN TIM ADJ⁽¹⁾

Idle condition

When adjusting target ignition timing

CLSD THL POS LEARN

Ignition on and engine stopped.

When learning the throttle valve closed position

⁽¹⁾	This function is not necessary in the usual service procedure.

SELF DIAGNOSTIC RESULT MODE

Self Diagnostic Item

Regarding items of DTC and 1st trip DTC, refer to "DTC INDEX ".

How to Read DTC and 1st Trip DTC

DTCs and 1st trip DTCs related to the malfunction are displayed in "self-diag results".

When ECM detects a 1st trip DTC, "1t" is displayed for "TIME".
When ECM has detected a current DTC, "0" is displayed for "TIME".
If "TIME" is neither "0" nor "1t", the DTC occurred in the past and ECM shows the number of times the vehicle has been driven since the last detection of the DTC.

How to Erase DTC and 1st Trip DTC

NOTE:

If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10 seconds and then turn it ON (engine stopped) again.
If the DTC is not for CVT related items (see "DTC INDEX "), skip step 1.

Erase DTC in TCM. Refer to "DTC INDEX ".
Select "ENGINE" with CONSULT-III.
Select "SELF-DIAG RESULTS".
Touch "ERASE". (DTC in ECM will be erased.)

Freeze Frame Data and 1st Trip Freeze Frame Data

FREEZE FRAME DATA REFERENCE CHART

Freeze frame data item⁽¹⁾

Description

DTC

The engine control component part/control system has a trouble code that is displayed as DTC. (Refer to "DTC INDEX ".)

FUEL SYS-B1

"Fuel injection system status" at the moment a malfunction is detected is displayed.
One mode in the following is displayed.
Mode2: Open loop due to detected system malfunction

Mode3: Open loop due to driving conditions (power enrichment, deceleration enleanment)

Mode4: Closed loop - using oxygen sensor(s) as feedback for fuel control

Mode5: Open loop - has not yet satisfied condition to Go to closed loop

CAL/LD VALUE [%]

The calculated load value at the moment a malfunction is detected is displayed.

COOLANT TEMP [°C] or [°F]

The engine coolant temperature at the moment a malfunction is detected is displayed.

L-FUEL TRM-B1 [%]

"Long-term fuel trim" at the moment a malfunction is detected is displayed.
The long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule than short-term fuel trim.

S-FUEL TRM-B1 [%]

"Short-term fuel trim" at the moment a malfunction is detected is displayed.
The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel schedule.

ENGINE SPEED [RPM]

The engine speed at the moment a malfunction is detected is displayed.

VEHICL SPEED [km/h] or [mph]

The vehicle speed at the moment a malfunction is detected is displayed.

ABSOL TH.P/S [%]

The throttle valve opening angle at the moment a malfunction is detected is displayed.

B/FUEL SCHDL [msec]

The base fuel schedule at the moment a malfunction is detected is displayed.

INT/A TEMP SE [°C] or [°F]

The intake air temperature at the moment a malfunction is detected is displayed.

FUEL SYS-B2

These items displayed but are not applicable to this model.

L-FUEL TRM-B2 [%]

S-FUEL TRM-B2 [%]

INT MANI PRES [kPa]

COMBUST CONDITION

⁽¹⁾	The items are the same as those of 1st trip freeze frame data.

DATA MONITOR MODE

Monitored Item

DATA MONITOR MODE REFERENCE CHART

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

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

"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.
This data also includes the data for the air-fuel ratio learning control.
When engine is running specification range is indicated in "SPEC".

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)

The A/F signal computed from the input signal of the air fuel ratio (A/F) sensor 1 is displayed.

HO2S2 (B1)

The signal voltage of the heated oxygen sensor 2 is displayed.

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.

VHCL SPEED SE

km/h or mph

The vehicle speed computed from the vehicle speed signal sent from combination meter is displayed.

BATTERY VOLT

The power supply voltage of ECM is displayed.

ACCEL SEN 1

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

TP SEN 1-B1

The throttle position sensor signal voltage is displayed.

TP SEN 2-B1 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.

TP SEN 2-B1

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

The signal voltage of EVAP control system pressure sensor is displayed.

FUEL LEVEL SE

The signal voltage of the fuel level sensor is displayed.

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 determined by the air conditioner ON signal.

P/N POSI SW

ON/OFF

Indicates [ON/OFF] condition from the park/neutral position (PNP) switch signal (M/T models) or Transmission range switch signal (CVT models).

PW/ST SIGNAL

ON/OFF

[ON/OFF] condition of the power steering system (determined by the signal sent from EPS control unit) 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.

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 advance angle.

INT/V 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.

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

Indicates the condition of the cooling fan (determined by ECM according to the input signals).
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.

I/P PULLY SPD

RPM

Indicates the engine speed computed from the input shaft revolution signal.

VEHICLE SPEED

km/h or mph

The vehicle speed computed from the vehicle speed signal sent from TCM is displayed.

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.

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.

AC PRESS SEN

The signal voltage from the refrigerant pressure sensor is displayed.

A/F ADJ-B1

Indicates the correction of factor stored in ECM. The factor is calculated from the difference between the target air-fuel ratio stored in ECM and the air-fuel ratio calculated from A/F sensor 1 signal.

BUT CUR SEN

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.

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.

VHCL SPEED SE

km/h or mph

The vehicle speed computed from the vehicle speed signal sent from combination meter 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/ACC switch signal.

SET SW

ON/OFF

Indicates [ON/OFF] condition from 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.

VHCL SPD CUT

NON/CUT

Indicates the vehicle cruse 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.

LO SPEED CUT

NON/CUT

Indicates the vehicle cruse condition.
NON: Vehicle speed is maintained at the ASCD set speed.

CUT: Vehicle speed decreased to excessively low and ASCD operation is cut off.

AT OD MONITOR

ON/OFF

Indicates [ON/OFF] condition of CVT O/D according to the input signal from the TCM.

AT OD CANCEL

ON/OFF

Indicates [ON/OFF] condition of CVT O/D cancel request signal 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.

THRTL STK CNT B1⁽¹⁾

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 DIAG2 (B1)

INCMP/CMPLT

Indicates DTC P0139 self-diagnosis (slow response) condition.
INCMP: Self-diagnosis is incomplete.

CMPLT: Self-diagnosis is complete.

A/F SEN1 DIAG2(B1)

INCMP/CMPLT

Indicates DTC P014C or P014D self-diagnosis condition.
INCMP: Self-diagnosis is incomplete.

CMPLT: Self-diagnosis is complete.

A/F SEN1 DIAG3(B1)

ABSNT/PRSNT

Indicates DTC P014C, P014D, P015A or P015B self-diagnosis condition.
ABSNT: The vehicle condition is not within the diagnosis range.

PRSNT: The vehicle condition is within the diagnosis range.

⁽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.

ACTIVE TEST MODE

Test Item

ACTIVE TEST MODE REFERENCE CHART

Test item

Condition

Judgment

Check item (Remedy)

FUEL INJECTION

Engine: Return to the original trouble condition
Change the amount of fuel injection using CONSULT-III.

If trouble symptom disappears, see CHECK ITEM.

Harness and connectors
Fuel injector
Air fuel ratio (A/F) sensor 1

IGNITION TIMING

Engine: Return to the original trouble condition
Timing light: Set
Retard the ignition timing using CONSULT-III.

If trouble symptom disappears, see CHECK ITEM.

Perform Idle Air Volume Learning.

POWER BALANCE

Engine: After warming up, idle the engine.
A/C switch OFF
Selector lever: P or N position (CVT), Neutral position (M/T)
Cut off each fuel injector signal one at a time using CONSULT-III.

Engine runs rough or dies.

Harness and connectors
Compression
Fuel injector
Power transistor
Spark plug
Ignition coil

COOLING FAN⁽¹⁾

Ignition switch: ON
Turn the cooling fan "LOW", "HI" and "OFF" using CONSULT-III.

Cooling fan moves and stops.

Harness and connectors
IPDM E/R (Cooling fan relay)
Cooling fan motor

ENG COOLANT TEMP

Engine: Return to the original trouble condition
Change the engine coolant temperature using CONSULT-III.

If trouble symptom disappears, see CHECK ITEM.

Harness and connectors
Engine coolant temperature sensor
Fuel injector

FUEL PUMP RELAY

Ignition switch: ON (Engine stopped)
Turn the fuel pump relay "ON" and "OFF" using CONSULT-III and listen to operating sound.

Fuel pump relay makes the operating sound.

Harness and connectors
Fuel pump relay

PURG VOL CONT/V

Engine: After warming up, run engine at 1,500 RPM.
Change the EVAP canister purge volume control solenoid valve opening percent using CONSULT-III.

Engine speed changes according to the opening percent.

Harness and connectors
Solenoid valve

FUEL/T TEMP SEN

Change the fuel tank temperature using CONSULT-III.

VENT CONTROL/V

Ignition switch: ON (Engine stopped)
Turn solenoid valve "ON" and "OFF" using the CONSULT-III and listen to operating sound.

Solenoid valve makes an operating sound.

Harness and connectors
Solenoid valve

V/T ASSIGN ANGLE

Engine: Return to the original trouble condition
Change intake valve timing using CONSULT-III.

If trouble symptom disappears, see CHECK ITEM.

Harness and connectors
Intake valve timing control solenoid valve

ALTERNATOR DUTY

Engine: idle.
Change duty ratio using CONSULT-III.

Battery voltage charges.

Harness and connectors
IPDM E/R
Alternator

⁽¹⁾	Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.

DTC & SRT CONFIRMATION MODE

SRT STATUS Mode

For items whose SRT codes are set, "CMPLT" is displayed on the CONSULT-III screen; for items whose SRT codes are not set, "INCMP" is displayed.
"SRT STATUS" provides the presence or absence of permanent DTCs stored in ECM memory.

PERMANENT DTC STATUS Mode

How to display permanent DTC status

Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON.
Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON.
Select "PERMANENT DTC STATUS" in "DTC & SRT CONFIRMATION" mode with CONSULT-III.
NOTE: Permanent DTCs stored in ECM memory are displayed on the CONSULT-III screen to show if a driving pattern required for erasing permanent DTCs is complete (CMPLT) or incomplete (INCMP).

CAUTION: Since the "PERMANENT DTC STATUS" screen displays the previous trip information, repeat the following twice to update the information: "Ignition switch OFF", "Wait for more than 10 seconds" and "Ignition switch ON".

Fig 1: DTC & SRT Confirmation Mode Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

NOTE: This mode is not used in regions that permanent DTCs are not regulated by law.