Nissan Sentra Service Manual: Consult function

Nissan Sentra Service Manual / Engine / Engine control system / Operation / Consult function

FUNCTION

Diagnostic test mode	Function
Self Diagnostic Results	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.*
Data Monitor	Input/Output data in the ECM can be read.
Work Support	This mode enables a technician to adjust some devices faster and more accurately by following the indications on the CONSULT unit.
Active Test	Diagnostic Test Mode in which CONSULT drives some actuators apart from the ECMs and also shifts some parameters in a specified range.
Ecu Identification	ECM part number can be read.
DTC Work Support	The use of this mode enables quick and accurate performance of Confirmation Procedure.

*: 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

SELF DIAGNOSTIC RESULTS MODE

Self Diagnostic Item

Regarding items of DTC and 1st trip DTC, refer to EC-94, "DTC Index".

How to Read DTC and 1st Trip DTC

DTCs and 1st trip DTCs related to the malfunction are displayed in вЂњSelf-diag resultsвЂќ.

When ECM detects a 1st trip DTC, вЂњ1tвЂќ is displayed for вЂњTIMEвЂќ.
When ECM has detected a current DTC, вЂњ0вЂќ is displayed for вЂњTIMEвЂќ.
If вЂњTIMEвЂќ is neither вЂњ0вЂќ nor вЂњ1tвЂќ, 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 EC-94, "DTC Index"), skip step 1.

Erase DTC in TCM. Refer to TM-105, "Description".
Select вЂњENGINEвЂќ using CONSULT.
Select вЂњSELF-DIAG RESULTSвЂќ.
Touch вЂњERASEвЂќ. (DTC in ECM will be erased.)

Freeze Frame Data and 1st Trip Freeze Frame Data

Freeze frame data item*	Description
DIAG TROUBLE CODE [PXXXX]	The engine control component part/control system has a trouble code the is displayed as PXXXX. (Refer to EC-94, "DTC Index".)
FUEL SYS-B1	Fuel injection system statusвЂќ at the moment a malfunction is detected is displayed. One of the following mode 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 [В°C] or [В°F]	The engine coolant temperature at the moment a malfunction is detected is displayed.
L-FUEL TRM-B1 [%]	вЂњLong-term fuel trimвЂќ 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 [%]	вЂњShort-term fuel trimвЂќ 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 THВ·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 [В°C] or [В°F]	The intake air temperature at the moment a malfunction is detected is displayed.
FUEL SYS-B2	These items are displayed but are not applicable to this model.
L-FUEL TRM-B2 [%]
S-FUEL TRM-B2 [%]
INT MANI PRES [kPa]
CONBUST CONDITION

*: The items are the same as those of 1st trip freeze frame data.

DATA MONITOR MODE

Monitored Item

NOTE:

The following table includes information (items) inapplicable to this vehicle. For information (items) applicable to this vehicle, refer to CONSULT display items.
For reference values of the following items, refer to EC-77, "Reference Value".

Work support mode

Work support mode

Work Item

*: This function is not necessary in the usual service procedure.

Active test mode

Test Item

*: Leaving cooling fan OFF with CONSULT while engine is running may cause the

*: Leaving cooling fan OFF with CONSULT while engine is running may cause the engine to overheat.

Dtc work support mode

SRT & P-DTC MODE

SRT & P-DTC MODE

SRT STATUS Mode

For items whose SRT codes are set, вЂњCMPLTвЂќ is displayed on the CONSULT screen; for items whose SRT codes are not set, вЂњINCMPвЂќ is displayed.
вЂњSRT STATUSвЂќ 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 вЂњPERMANENT DTC STATUSвЂќ in вЂњDTC & SRT CONFIRMATIONвЂќ mode with CONSULT.

NOTE:

Permanent DTCs stored in ECM memory are displayed on the CONSULT screen to show if a driving pattern required for erasing permanent DTCs is complete (CMPLT) or incomplete (INCMP).

CAUTION:

Since the вЂњPERMANENT DTC STATUSвЂќ screen displays the previous trip information, repeat the following twice to update the information: вЂњIgnition switch OFFвЂќ, вЂњWait for more than 10 secondsвЂќ and вЂњIgnition switch ONвЂќ.

NOTE:

NOTE:

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

SRT WORK SUPPORT Mode

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

PERMANENT DTC WORK SUPPORT Mode

This mode enables a technician to drive a vehicle to complete the driving pattern that is required for erasing permanent DTC.

NOTE:

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

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Ecu diagnosis information

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