Nissan Qashqai J11. Manual - part 353

IGNITION SIGNAL

ECM-389

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace condenser.

Condenser

Resistance M

Ω

 [at 25

°

C (77

°

F)]

+

−

Terminal

1

2

Above 1

ECM-390

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

ELECTRICAL LOAD SIGNAL

ELECTRICAL LOAD SIGNAL

Description

INFOID:0000000010703074

The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred
from BCM via the CAN communication through IPDM E/R to ECM.

Component Function Check

INFOID:0000000010703075

1.

CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” of “ENGINE” with CONSULT.

3.

Select “LOAD SIGNAL” and check indication under the following conditions.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Proceed to 

ECM-390, "Diagnosis Procedure"

.

2.

CHECK LIGHTING SWITCH FUNCTION

Check “LOAD SIGNAL” indication under the following conditions.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Proceed to 

ECM-390, "Diagnosis Procedure"

.

3.

CHECK HEATER FAN CONTROL SWITCH FUNCTION

Select “HEATER FAN SW” and check indication under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

ECM-390, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010703076

1.

INSPECTION START

Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to 

ECM-390, "Com-

ponent Function Check"

.

Which circuit is related to the incident?

Rear window defogger>>GO TO 2.
Headlamp>>GO TO 3.
Heater fan>>GO TO 4.

2.

CHECK REAR WINDOW DEFOGGER SYSTEM

Check rear window defogger system. Refer to 

DEF-22, "Work Flow"

.

Monitor item

Condition

Indication

LOAD SIGNAL

Rear window defogger 
switch

ON

ON

OFF

OFF

Monitor item

Condition

Indication

LOAD SIGNAL

Lighting switch

ON at 2nd 
position

ON

OFF

OFF

Monitor item

Condition

Indication

HEATER FAN SW

Heater fan control switch

ON

ON

OFF

OFF

ELECTRICAL LOAD SIGNAL

ECM-391

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

>> INSPECTION END

3.

CHECK HEADLAMP SYSTEM

Check headlamp system. Refer to 

EXL-70, "Work Flow"

 (LED type), 

EXL-242, "Work Flow"

 (halogen type).

>> INSPECTION END

4.

CHECK HEATER FAN CONTROL SYSTEM

Check heater fan control system. Refer to 

HAC-68, "Work Flow"

 (With automatic air conditioning) 

HAC-182,

"Work Flow"

 (With manual air conditioning).

>> INSPECTION END

ECM-392

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

SENSOR POWER SUPPLY 2 CIRCUIT

SENSOR POWER SUPPLY 2 CIRCUIT

Description

INFOID:0000000010703077

ECM supplies a voltage of 5 V to some of the sensors systematically divided into 2 groups, respec-
tively.Accordingly, when a short circuit develops in a sensor power source, a malfunction may occur simulta-
neously in the sensors belonging to the same group as the short-circuited sensor.

Sensor power supply 1

• CKP sensor (POS)
• APP sensor 1
• Exhaust valve timing control position sensor
• Electric throttle control actuator
NOTE:
If sensor power supply 1 circuit is malfunctioning, DTC P0643 is displayed.

Sensor power supply 2

• Barometric pressure sensor
• Refrigerant pressure sensor
• Fuel rail pressure sensor
• CMP sensor
• APP sensor 2
• Engine oil pressure sensor

Diagnosis Procedure

INFOID:0000000010703078

1.

CHECK ACCELERATOR PEDAL POSITION SENSOR 2 POWER SUPPLY CIRCUIT-1

1.

Turn ignition switch OFF.

2.

Disconnect accelerator pedal position (APP) sensor harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK ACCELERATOR PEDAL POSITION SENSOR 2 POWER SUPPLY CIRCUIT-2

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between APP sensor harness connector and ECM harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning part.

3.

CHECK SENSOR POWER SUPPLY 2 CIRCUIT

Check harness for short to power and short to ground, between the following terminals.

+

−

Voltage

(Approx.)

APP sensor

Connector

Terminal

E20

5

Ground

5 V

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

E20

5

E57

118

Existed