Nissan Qashqai J11. Manual — part 353
![](/vehicles/gon/ffua/forullalerus/lind.png)
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
![](/vehicles/gon/ffua/forullalerus/febe.png)
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
.
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
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
![](/vehicles/gon/ffua/forullalerus/ssgerinohor.png)
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
(LED type),
(halogen type).
>> INSPECTION END
4.
CHECK HEATER FAN CONTROL SYSTEM
Check heater fan control system. Refer to
(With automatic air conditioning)
(With manual air conditioning).
>> INSPECTION END
![](/vehicles/gon/ffua/forullalerus/peti.png)
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
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