Qashqai J11. Engine control system (MR20DD)

power before disconnecting the 12V battery terminal, observing
“How to disconnect 12V battery terminal” described below.
NOTE:
Some ECUs operate for a certain fixed time even after ignition
switch is turned OFF and ignition power supply is stopped. If the
battery terminal is disconnected before ECU stops, accidental DTC
detection or ECU data damage may occur.

• For vehicles with the 2-batteries, be sure to connect the main bat-

tery and the sub battery before turning ON the ignition switch.
NOTE:
If the ignition switch is turned ON with any one of the terminals of
main battery and sub battery disconnected, then DTC may be detected.

• After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC.

NOTE:
The removal of 12V battery may cause a DTC detection error.

HOW TO DISCONNECT 12V BATTERY TERMINAL

Disconnect 12V battery terminal according to Instruction 1 or Instruction 2 described below.
For vehicles parked by ignition switch OFF, refer to Instruction 2.

INSTRUCTION 1

Open the hood.

Turn key switch to the OFF position with the driver side door opened.

Get out of the vehicle and close the driver side door.

Wait at least 3 minutes. For vehicle with the engine listed below, remove the battery terminal after a lapse
of the specified time.

CAUTION:

While waiting, never operate the vehicle such as locking, opening, and closing doors. Violation of
this caution results in the activation of ACC power supply according to the Auto ACC function.

Remove 12V battery terminal.

CAUTION:

After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.

INSTRUCTION 2 (FOR VEHICLES PARKED BY IGNITION SWITCH OFF)

Unlock the door with intelligent key or remote keyless entry.
NOTE:
At this moment, ACC power is supplied.

Open the driver side door.

Open the hood.

Close the driver side door.

Wait at least 3 minutes.

CAUTION:

While waiting, never operate the vehicle such as locking, opening, and closing doors. Violation of
this caution results in the activation of ACC power supply according to the Auto ACC function.

Remove 12V battery terminal.

CAUTION:

After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.

SEF289H

D4D engine

: 20 minutes

HRA2DDT

: 12 minutes

K9K engine

: 4 minutes

M9R engine

: 4 minutes

R9M engine

: 4 minutes

V9X engine

: 4 minutes

PRECAUTIONS

ECM-9

< PRECAUTION >

[MR20DD]

ECM

On Board Diagnostic (OBD) System of Engine and CVT

INFOID:0000000010702780

The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.

CAUTION:

• Be sure to turn the ignition switch OFF and disconnect the negative battery cable before any repair

or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will
cause the MIL to light up.

• Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will

cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)

• Certain systems and components, especially those related to OBD, may use a new style slide-lock-

ing type harness connector. For description and how to disconnect, refer to

PG-5, "Harness Connec-

tor"

• Be sure to route and secure the harnesses properly after work. The interference of the harness with

a bracket, etc. may cause the MIL to light up due to the short circuit.

• Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube

may cause the MIL to light up due to the malfunction of the EVAP system or fuel injection system,
etc.

• Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and

TCM (Transmission control module) before returning the vehicle to the customer.

General Precautions

INFOID:0000000010702781

• Always use a 12 volt battery as power source.
• Do not attempt to disconnect battery cables while engine is

running.

• Before connecting or disconnecting the ECM harness con-

nector, turn ignition switch OFF and disconnect negative bat-
tery cable. Failure to do so may damage the ECM because
battery voltage is applied to ECM even if ignition switch is
turned OFF.

• Before removing parts, turn ignition switch OFF and then dis-

connect battery ground cable.

• Do not disassemble ECM.
• If a battery cable is disconnected, the memory will return to

the ECM value.
The ECM will now start to self-control at its initial value.
Engine operation can vary slightly when the terminal is dis-
connected. However, this is not an indication of a malfunc-
tion. Do not replace parts because of a slight variation.

• If the battery is disconnected, the following emission-related

diagnostic information will be lost within 24 hours.

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

SEF289H

JPBIA4618ZZ

ECM-10

< PRECAUTION >

[MR20DD]

PRECAUTIONS

• When connecting or disconnecting pin connectors into or

from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM pin
terminal, when connecting pin connectors.

• Securely connect ECM harness connectors.

A poor connection can cause an extremely high (surge) volt-
age to develop in coil and condenser, thus resulting in dam-
age to ICs.

• Keep engine control system harness at least 10 cm (4 in) away

from adjacent harness, to prevent engine control system mal-
functions due to receiving external noise, degraded operation
of ICs, etc.

• Keep engine control system parts and harness dry.
• Before replacing ECM, perform ECM Terminals and Reference

Value inspection and make sure ECM functions properly.
Refer to

ECM-73, "Reference Value"

• Handle mass air flow sensor carefully to avoid damage.
• Do not clean mass air flow sensor with any type of detergent.
• Do not disassemble electric throttle control actuator.
• Even a slight leak in the air intake system can cause serious

incidents.

• Do not shock or jar the camshaft position sensor (PHASE),

crankshaft position sensor (POS).

• After performing each TROUBLE DIAGNOSIS, perform DTC

CONFIRMATION PROCEDURE or Component Function
Check. The DTC should not be displayed in the DTC Confir-
mation Procedure if the repair is completed. The Component
Function Check should be a good result if the repair is com-
pleted.

PBIB0090E

MEF040D

SAT652J

PRECAUTIONS

ECM-11

< PRECAUTION >

[MR20DD]

ECM

• When measuring ECM signals with a circuit tester, never allow

the two tester probes to contact.
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.

• Do not operate fuel pump when there is no fuel in lines.
• Tighten fuel hose clamps to the specified torque.

• Do not depress accelerator pedal when starting.
• Immediately after starting, do not rev up engine unnecessar-

ily.

• Do not rev up engine just prior to shutdown.

• When installing C.B. ham radio or a mobile phone, be sure to

observe the following as it may adversely affect electronic
control systems depending on installation location.

- Keep the antenna as far as possible from the electronic con-

trol units.

- Keep the antenna feeder line more than 20 cm (8 in) away

from the harness of electronic controls.
Do not let them run parallel for a long distance.

- Adjust the antenna and feeder line so that the standing-wave

ratio can be kept smaller.

- Be sure to ground the radio to vehicle body.

SEF348N

SEF709Y

SEF708Y

PREPARATION

ECM-13

< PREPARATION >

[MR20DD]

ECM

Oxygen sensor thread
cleaner
i.e.: (J-43897-18)
(J-43897-12)

Reconditions the exhaust system threads before
installing a new oxygen sensor. Use with anti-
seize lubricant shown below.
a: 18 mm diameter with pitch 1.5 mm for Zirco-
nia Oxygen Sensor
b: 12 mm diameter with pitch 1.25 mm for Tita-
nia Oxygen Sensor

Anti-seize lubricant

i.e.: (Permatex

133AR or equivalent
meeting MIL specifica-
tion MIL-A-907)

Lubricates oxygen sensor thread cleaning tool
when reconditioning exhaust system threads.

Tool name
(SPX-North America
No.)

Description

AEM488

S-NT779

ECM-14

< SYSTEM DESCRIPTION >

[MR20DD]

COMPONENT PARTS

SYSTEM DESCRIPTION

COMPONENT PARTS

ENGINE CONTROL SYSTEM

ENGINE CONTROL SYSTEM : Component Parts Location

INFOID:0000000010702784

NOTE:
This figure shows RHD models. LHD models are mirror image of this figure.

ENGINE ROOM COMPARTMENT

ENIGNE COMPARTMENT

No.

Component

Function

IPDM E/R

IPDM E/R control the internal relays and the actuators. And
when CAN communication with ECM is impossible, IPDM E/
R performs fail-safe control.
•

PCS-7, "RELAY CONTROL SYSTEM : System Descrip-
tion"

•

PCS-8, "RELAY CONTROL SYSTEM : Fail-safe"

•

PCS-11, "POWER CONTROL SYSTEM : System Descrip-
tion"

Mass air flow sensor
(with intake air temperature sensor)

ECM-21, "Mass Air Flow Sensor (With Intake Air Tempera-
ture Sensor)"

Electric throttle control actuator
(with built in throttle position sensor and throttle control mo-
tor)

ECM-18, "Electric Throttle Control Actuator"

EVAP canister purge volume control solenoid valve

ECM-27, "EVAP Canister Purge Volume Control Solenoid
Valve"

Intake manifold runner control valve

ECM-24, "Intake Manifold Runner Control Valve"

ECM

ECM-18, "ECM"

Barometric pressure sensor

ECM-25, "Barometric Pressure Sensor"

JSBIA4530ZZ

COMPONENT PARTS

ECM-15

< SYSTEM DESCRIPTION >

[MR20DD]

ECM

JSBIA4503ZZ

Cylinder block left side
(Vehicle front side)

Cylinder head front side
(Vehicle right side)

: Vehicle front

No.

Component

Function

Ignition coil

ECM-19, "Ignition Coil With Power Transistor"

PCV valve

ECM-29, "Positive Crankcase Ventilation"

Engine oil pressure sensor

ECM-26, "Engine Oil Pressure Sensor"

Engine oil temperature sensor

ECM-26, "Engine Oil Temperature Sensor"

Camshaft position sensor

ECM-23, "Camshaft Position Sensor"

Engine coolant temperature sensor

ECM-22, "Engine Coolant Temperature Sensor"

Exhaust valve timing control position sensor

ECM-23, "Exhaust Valve Timing Control Position Sensor"

High pressure fuel pump

ECM-20, "High Pressure Fuel Pump"

Fuel injector

ECM-20, "Fuel Injector"

ECM-16

< SYSTEM DESCRIPTION >

[MR20DD]

COMPONENT PARTS

EXHAUST COMPARTMENT

BODY COMPARTMENT

10.

Fuel rail pressure sensor

ECM-21, "Fuel Rail Pressure Sensor"

11.

Knock sensor

ECM-25, "Knock Sensor"

12.

Crankshaft position sensor

ECM-23, "Crankshaft Position Sensor"

13.

Exhaust valve timing control solenoid valve

ECM-24, "Exhaust Valve Timing Control Solenoid Valve"

14.

Intake valve timing control solenoid valve

ECM-23, "Intake Valve Timing Control Solenoid Valve"

No.

Component

Function

No.

Component

Function

Air fuel ratio (A/F) sensor 1

ECM-24, "Air Fuel Ratio (A/F) Sensor 1"

Heated oxygen sensor 2

ECM-25, "Heated Oxygen Sensor 2"

JSBIA4504ZZ

COMPONENT PARTS

ECM-17

< SYSTEM DESCRIPTION >

[MR20DD]

ECM

Radiator assembly

Front right side of engine room area

Periphery of pedals

Vehicle front

No.

Component

Function

Refrigerant pressure sensor

ECM-27, "Refrigerant Pressure Sensor"

Fuel pump

ECM-21, "Low Pressure Fuel Pump"

ASCD steering switch

ECM-28, "ASCD Steering Switch"

Combination meter

MIL

ECM-62, "DIAGNOSIS DESCRIPTION : Malfunction Indica-
tor Lamp (MIL)"

Cooling fan register

ECM-26, "Cooling Fan Resistor"

Cooling fan motor

ECM-26, "Cooling Fan"

EVAP canister

ECM-27, "EVAP Canister Purge Volume Control Solenoid
Valve"

Clutch interlock switch (M/T models)

ECM-27, "Clutch Interlock Switch"

Clutch pedal position switch (M/T models)

ECM-27, "Clutch Pedal Position Switch"

10.

Accelerator pedal position sensor

ECM-18, "Accelerator Pedal Position Sensor"

11.

Stop lamp switch

ECM-27, "Stop Lamp Switch and Brake pedal position
switch"

12.

Brake pedal position switch

JSBIA5103ZZ

Qashqai J11. Engine control system (MR20DD) - part 1