EC-38
< SYSTEM DESCRIPTION >[HR16DE]
SYSTEM
CAN COMMUNICATION
CAN COMMUNICATION : System DescriptionINFOID:0000000012431315
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication s
peed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CA N communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
Refer to LAN-30, "
CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart", about CAN com-
munication for detail.
COOLING FAN CONTROL
COOLING FAN CONTROL : System DiagramINFOID:0000000012431316
COOLING FAN CONTROL : System DescriptionINFOID:0000000012431317
INPUT/OUTPUT SIGNAL CHART
*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to ECM through CAN communication line.
SYSTEM DESCRIPTION (CVT MODELS)
ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, refrigerant pres-
sure, air conditioner ON signal. Then contro l system has 3-step control [HIGH/LOW/OFF].
JSBIA0321GB
SensorInput signal to ECM ECM functionActuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed
*1
Piston position
Cooling fan speed request
signalIPDM E/R
↓
Cooling fan relay
↓
Cooling fan motor
Engine coolant temperature sensor Engine coolant temperature
Refrigerant pressure sensor
Refrigerant pressure
Battery Battery voltage
*1
Combination meterVehicle speed*2
BCMA/C ON signal*2
Blower fan signal*2
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SYSTEMEC-43
< SYSTEM DESCRIPTION > [HR16DE]
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*1: ECM determines the start signal status
by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the exhaust
valve.
The ECM receives signals such as crankshaft positi on, camshaft position, engine speed, engine oil tempera-
ture and engine coolant temperature. Then, the ECM s ends ON/OFF pulse duty signals to the exhaust valve
timing (EVT) control solenoid valve depending on driving stat us. This makes it possible to control the shut/
open timing of the exhaust valve to increase engi ne torque and output in a range of high engine speed.
ENGINE PROTECTION CONTROL AT LOW ENGINE OIL PRESSURE
ENGINE PROTECTION CONTROL AT LOW ENGINE OIL PRESSURE : System Dia-
gram
INFOID:0000000012431324
ENGINE PROTECTION CONTROL AT LOW ENGINE OIL PRESSURE : System De-
scription
INFOID:0000000012431325
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
• The engine protection control at low engine oil pressure warns the driver of a decrease in engine oil pres-
sure by the oil pressure warning lamp a before the engine becomes damaged.
• When detecting a decrease in engine oil pressure at an engine speed less than 1,000 rpm, ECM transmits an oil pressure warning lamp signal to the combination meter. The combination meter turns ON the oil pres-
sure warning lamp, according to the signal.
JPBIA4886GB
JSBIA0704GB
Sensor Input signal to ECM ECM function Actuator
Engine oil pressure sensor Engine pressure Engine protection control
• Oil pressure warning lamp signalCombination meter
• Oil pressure warning lamp
Crankshaft position sensor (POS) Engine speed
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EC-44
< SYSTEM DESCRIPTION >[HR16DE]
SYSTEM
*: When detecting a normal engine oil pressure, ECM turns OFF the oil pressure warning lamp.
FUEL FILLER CAP WARNING SYSTEM
FUEL FILLER CAP WARNING
SYSTEM : System DiagramINFOID:0000000012431326
FUEL FILLER CAP WARNING SYS TEM : System DescriptionINFOID:0000000012431327
INPUT/OUTPUT SIGNAL CHART
Input
*: This signal is sent to the ECM via the CAN communication line.
Output
*: This signal is sent to the combination meter via the CAN communication line.
SYSTEM DESCRIPTION
The fuel filler cap warning system alerts the driver to the prevention of the fuel filler being left uncapped and
malfunction occurrences after refueling, by turning ON the fuel filler cap warning display on the combination
meter.
ECM judges a refueled state, based on a fuel level signal transmitted from the combination meter.
When a very small leak is detected through the EVAP leak diagnosis performed after judging the refueled
state, ECM transmits a fuel filler cap warning display signal (request for display ON) to the combination meter
via CAN communication.
When receiving the signal, the combination meter turns ON the fuel filler cap warning display.
CAUTION:
Check fuel filler cap installation condition when the fuel filler cap warning display turns ON.
Reset Operation
Decrease in engine
oil pressure Engine speed Combination meter
Oil pressure warning lamp
Detection Less than 1,000 rpm
ON*
1,000 rpm or more ON
Unit/Sensor Input signal to ECM ECM function
EVAP control system pressure sensor Pressure in purge line
Fuel filler cap warning control
Combination meter Fuel level
Fuel filler cap warning reset signal
*
JSBIA0797GB
Unit
Output signal Actuator
ECM Fuel filler cap warning display signal
*Combination meter
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SYSTEMEC-45
< SYSTEM DESCRIPTION > [HR16DE]
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The fuel filler cap warning lamp tunes OFF, according to any condition listed below:
• Reset operation is performed by operating the meter control switch on the combination meter. Refer to
MWI-
16, "Switch Name and Function".
- When the reset operation is performed, the combination meter transmits a fuel filler cap warning reset signal to ECM via CAN communication. ECM transmits a fuel filler cap warning display signal (request for display
OFF) to the combination meter via CAN communication. When receiving the signal, the combination meter
turns OFF the fuel filler cap warning display.
• EVAP leak diagnosis result is normal.
• Fuel refilled.
• DTC erased by using CONSULT.
NOTE:
MIL turns ON if a malfunction is detected in leak diagnosis results again at the trip after the fuel filler cap warn-
ing display turns ON/OFF.
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
AUTOMATIC SPEED CONTROL DEVI CE (ASCD) : System DiagramINFOID:0000000012431328
AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System DescriptionINFOID:0000000012431329
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM via the CAN communication line
BASIC ASCD SYSTEM
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can be set the vehicle speed in the set speed range.
ECM controls throttle angle of electric thro ttle control actuator to regulate engine speed.
Operation status of ASCD is indicated in combination meter.
If any malfunction occurs in the ASCD system, it automatically deactivates the ASCD control.
JSBIA3607GB
SensorInput signal to ECM ECM functionActuator
ASCD steering switch ASCD steering switch operation
ASCD vehicle speed control Electric throttle control actuator
Brake pedal position switch
Brake pedal operation
Stop lamp switch
Clutch pedal position switch Clutch pedal operation
Transmission range switch Gear position
Park/neutral position (PNP) switch PNP signal
Combination meter Vehicle speed signal*
TCM Output shaft revolution signal*
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EC-66
< SYSTEM DESCRIPTION >[HR16DE]
DIAGNOSIS SYSTEM (ECM)
HO2 S2 DIAG1(B1)INCMP/CM-
PLT • Indicates DTC P0139 self-diagnosis (delayed re-
sponse) condition.
- INCMP: Self-diagnosis is incomplete.
- CMPLT: Self-diagnosis is complete.
SYSTEM 1 DIAG-
NOSIS A B1 INCMP/CM-
PLT • Indicates DTC P219A self-diagnosis condition.
- INCMP: Self-diagnosis is incomplete.
- CMPLT: Self-diagnosis is complete.
SYSTEM 1 DIAG-
NOSIS B B1 ABSNT/
PRSNT • Indicates DTC P219A self-diagnosis condition.
- ABSNT: Self-dia
gnosis standby
- PRSNT: Under self-diagnosis
A/GRLL SHTTR PO-
SITION F/CLOSE
MOVING
F/OPENUNIDTF • Indicates the status of active grille shutter.
- F/CLOSE: Active grille shutter is fully closed.
- MOVING: Active grille shutter is in motion.
- F/OPEN: Active grille shutter is fully opened.
- UNIDTF: Unable to specify the shutter position.
A/GRLL SHTTR
CALIBRATION INCMP/CM-
PLT • Indicates initial position learning status of active
grille shutter.
- CMPLT: The leaning is complete.
- INCOMP: The learning is incomplete.
A/GRLL SHTTR
CIRCUIT DIAG OK/NG• Indicates the diagnosis result of active grille shut-
ter circuit.
-OK: Normal.
- NG: Malfunction detected.
A/GRLL SHTTR
TEMP DIAG OK/NG• Indicates the diagnosis result of active grille shut-
ter actuator temperature status.
-OK: Normal
- NG: Abnormal temperature detected.
A/GRLL SHTTR
VOLT DIAG OK/NG• Indicates the diagnosis result of active grille shut-
ter voltage status.
-OK: Normal
- NG: Abnormal voltage detected.
A/GRLL SHTTR
OVER RUN OK/NG• Indicates active grille shutter moves beyond nor-
mal moving limit.
-OK: Normal
- NG: Malfunction detected.
A/GRLL SHTTR
STUCK OK/NG• Indicates the diagnosis result of active grille shut-
ter stuck or the operation range less than normal.
-OK: Normal
- NG: Malfunction detected.
A/GRLL SHTTR
CALIB DIAG OK/NG• Indicates the diagnosis result of initial position
learning of active grille shutter.
-OK: Normal
- NG: Deficiency detected.
A/F-S ATMSPHRC
CRCT B1 —Displays a determined value of atmospheric correc-
tion factor necessary for correcting an A/F sensor
signal input to ECM. The signal used for the correc-
tion is an A/F sensor signal transmitted while driving
under atmospheric pressure.
A/F-S ATMSPHRC
CRCT B2 —Displays a determined value of atmospheric correc-
tion factor necessary for correcting an A/F sensor
signal input to ECM. The signal used for the correc-
tion is an A/F sensor signal transmitted while driving
under atmospheric pressure.
A/F-S ATMSPHRC
CRCT UP B1 countDisplays the number of updates of the A/F sensor
atmospheric correction factor.
A/F-S ATMSPHRC
CR CT UP B2 coun
t Dis
plays the number of updates of the A/F sensor
atmospheric correction factor.
Monitored item Unit
DescriptionRemarks
Revision: August 2015 2016 Versa Note
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EC-68
< SYSTEM DESCRIPTION >[HR16DE]
DIAGNOSIS SYSTEM (ECM)
*: Leaving cooling fan OFF with CONSULT while engine is running may cause the engine to overheat.TEST ITEM
CONDITION JUDGMENTCHECK ITEM (REMEDY)
FUEL INJECTION • Engine: Return to the original trouble
condition
• Change the amount of fuel injection
using CONSULT. If trouble symptom disappears, see
CHECK ITEM.
• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1
ENG COOLANT
TEMP • Engine: Return to the original trouble
condition
• Change the engine coolant tempera-
ture using CONSULT. If trouble symptom disappears, see
CHECK ITEM.• Harness and connectors
• Engine coolant temperature
sensor
• Fuel injector
PURG VOL CONT/V • Engine: After warming up, run engine
at 1,500 rpm.
• Change the EVAP canister purge vol-
ume control solenoid valve opening
percent using CONSULT. Engine speed changes according to
the opening percent.
• Harness and connectors
• Solenoid valve
FUEL/T TEMP SEN Change the fuel tank temperature using CONSULT.
COOLING FAN* • Ignition switch: ON
• Turn the cooling fan “LOW”, “HI” and
“OFF” CONSULT. Cooling fan moves and stops.
• Harness and connectors
• IPDM E/R (Cooling fan relay)
• Cooling fan motor
ALTERNATOR
DUTY • Engine: Idle
• Change duty ratio using CONSULT.
Battery voltage changes.• Harness and connectors
• IPDM E/R
•Alternator
FUEL PUMP RELAY • Ignition switch: ON
• Turn the fuel pump relay “ON” and
“OFF” using CONSULT and listen to
operating sound. Fuel pump relay makes the operat-
ing sound.
• Harness and connectors
•Fuel pump relay
IGNITION TIMING • Engine: Return to the original trouble
condition
• Timing light: Set
• Retard the ignition timing using CON- SULT. If trouble symptom disappears, see
CHECK ITEM.
Perform Idle Air Volume Learn-
ing.
POWER BALANCE • Engine: After warming up, idle the en-
gine.
• A/C switch OFF
• Shift lever: P or N (CVT), Neutral (M/
T)
• Cut off each fuel injector signal one at
a time using CONSULT. Engine runs rough or dies.
• Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil
VENT CONTROL/V • Ignition switch: ON
• Turn solenoid valve ON and OFF with
the CONSULT and listen to operating
sound. Solenoid valve makes an operating
sound.
• Harness and connectors
• EVAP canister vent control
solenoid valve
INT V/T ASSIGN
ANGLE • Engine: Return to the original non-
standard condition
• Change intake valve timing using CONSULT. If malfunctioning symptom disap-
pears, see CHECK ITEM.
• Harness and connectors
• Intake valve timing control
solenoid valve
EX H V/T ASSIGN
ANGLE •
E
ngine: Return to the original non-
standard condition
• Change exhaust valve timing using CONSULT. If malfunctioning symptom disap-
pears, see CHECK ITEM.
• Harness and connectors
• Exhaust valve timing control
solenoid valve
ACTIVE GRILLE
SHUTTER NOTE:
Initial position learning is required every
time when the ignition switch is turned
OFF.
1. Engine: Idle speed
2. Touch “CALIBRTN” to perform ini-
tial position learning.
3. Touch “OPEN” or “CLOSE” to op- erate active grille shutter. Active grille shutter fully opens or
fully closes.
• Harness or connector
• Active grille shutter actuator
• Active grille shutter
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ECM
EC-71
< ECU DIAGNOSIS INFORMATION > [HR16DE]
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ECU DIAGNOSIS INFORMATION
ECM
Reference ValueINFOID:0000000012431342
VALUES ON THE DIAGNOSIS TOOL
NOTE:
• The following table includes information (items) inapplicable to this vehicle. For information (items) applica-
ble to this vehicle, refer to CONSULT display items.
• Numerical values in the following table are reference values.
• These values are input/output values that ECM receiv es/transmits and may differ from actual operations.
Example: The ignition timing shown by the timing light may differ from the ignition timing displayed on the
data monitor.
This occurs because the timing light shows a value calculated by ECM according to signals received from
the camshaft position sensor and other sensors related to ignition timing.
• For outlines of following items, refer to EC-60, "
CONSULT Function".
Monitor Item Condition Values/Status
IDLE REQUEST NOTE:
The item is indicated, but not used.
MIL ON REQUEST NOTE:
The item is indicated, but not used.
ENGINE NO-LOAD NOTE:
The item is indicated, but not used.
READY STATE NOTE:
The item is indicated, but not used.
ENG SPEED • Run engine and compare CONSULT value with the tachometer indication.Almost the same speed as
the tachometer indication.
MAS A/F SE-B1 See EC-151, "
Description".
B/FUEL SCHDL See EC-151, "
Description".
A/F ALPHA-B1 See EC-151, "
Description".
COOLAN TEMP/S • Engine: After warming up More than 70°C (158F)
A/F SEN1 (B1) • Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2 V
HO2S2 (B1) • Revving engine from idle up to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle for 1 minute under no load 0 - 0.3 V
←→ Approx. 0.6 -
1.0 V
HO2S2 MNTR (B1) LEAN ←→ RICH
VHCL SPEED SE • Turn drive wheels and compare CONSULT value with the speedometer indi-
cation. Almost the same speed as
speedometer indication
BATTERY VOLT • Ignition switch: ON (Engine stopped) 11 - 14 V
ACCEL SEN 1 • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released
0.6 - 0.9 V
Accelerator pedal: Fully depressed 4.0 - 4.8 V
ACCEL SEN 2 • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released
0.6 - 0.9 V
Accelerator pedal: Fully depressed 3.9 - 4.8 V
TP SEN 1-B1 • Ignition switch: ON
(Engine stopped)
• Shift lever: 1st Accelerator pedal: Fully re
leasedMore than 0.36 V
Accelerator pedal: Fully depressed Less than 4.75 V
TP SEN 2-B1 • Ignition switch: ON
(Engine stopped)
• Shift lever:1st Accelerator pedal: Fully re
leasedMore than 0.36 V
Accelerator pedal: Fully depressed Less than 4.75 V
FUEL T/TMP SE • Ignition switch: ON Indicates fuel tank tempera-
ture
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2016 Versa Note
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EC-130
< BASIC INSPECTION >[HR16DE]
IDLE AIR VOLUME LEARNING
IDLE AIR VOLUME LEARNING
DescriptionINFOID:0000000012431358
Idle Air Volume Learning is a function of ECM to learn the idle air volume that keeps each engine idle speed
within the specific range. It must be performed under any of the following conditions:
• Each time electric throttle control actuator or ECM is replaced.
• Idle speed or ignition timing is out of specification.
Refer to
EC-130, "
Work Procedure".
Work ProcedureINFOID:0000000012431359
1.PRECONDITIONING
Make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the follo wing conditions are missed for even a moment.
• Battery voltage: More than 12.9 V (At idle)
• Engine coolant temperature: 70 - 100 °C (158 - 212° F)
• Selector lever: P or N (CVT), Neutral (M/T)
• Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
- For vehicles equipped with dayt ime light systems, perform one of the following procedures before
starting engine not to illuminate headlamps.
• Apply parking brake
• Set lighting switch to the 1st position
• Steering wheel: Neutral (Straight-ahead position) position
• Vehicle speed: Stopped
• Transmission: Warmed-up
- CVT models
• With CONSULT: Drive vehicle until “FLUID TEMP SE ” in “DATA MONITOR” mode of “TRANSMISSION” sys-
tem indicates less than 0.9 V.
• Without CONSULT: Drive vehicle for 10 minutes.
- M/T models
• Drive vehicle for 10 minutes.
Do you have CONSULT?
YES >> GO TO 2.
NO >> GO TO 3.
2.IDLE AIR VOLUME LEARNING
With CONSULT
1. Perform ACCELERATOR PEDAL RELEAS ED POSITION LEARNING. Refer to EC-128, "
Description".
2. Perform THROTTLE VALVE CLOSED POSITION LEARNING. Refer to EC-129, "
Description".
3. Start engine and warm it up to normal operating temperature.
4. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode with CONSULT.
5. Touch “START” and wait 20 seconds.
Is
“CMPLT” displayed on CONSULT screen?
YES >> GO TO 4.
NO >> GO TO 5.
3.IDLE AIR VOLUME LEARNING
Without CONSULT
NOTE:
• It is better to count the ti me accurately with a clock.
• It is impossible to switch the di agnostic mode when an accelerator pedal position sensor circuit has
a malfunction.
1. Perform ACCELERATOR PEDAL RELEAS ED POSITION LEARNING. Refer to EC-128, "
Description".
2. Perform THROTTLE VALVE CLOSED POSITION LEARNING. Refer to EC-129, "
Description".
3. Start engine and warm it up to normal operating temperature.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Confirm that accelerator pedal is fully releas ed, turn ignition switch ON and wait 3 seconds.
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