Nissan Qashqai J11. Manual - part 245

ECH-278

< DTC/CIRCUIT DIAGNOSIS >

[HRA2DDT]

P1656 ENGINE RESTART BYPASS RELAY

6.

CHECK ENGINE RESTART BYPASS RELAY

Check the engine restart bypass relay. Refer to 

ECH-274, "Component Inspection (Engine Restart Bypass

Relay)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Replace error-detected parts.

Component Inspection (Engine Restart Bypass Control Relay)

INFOID:0000000010500738

1.

CHECK ENGINE RESTART BYPASS CONTROL RELAY

1.

Turn ignition switch OFF.

2.

Remove engine restart bypass control relay.

3.

Check continuity between engine restart bypass control relay
terminals as per the following condition. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace engine restart bypass control relay.

Component Inspection (Engine Restart Bypass Relay)

INFOID:0000000010500739

1.

CHECK ENGINE RESTART BYPASS RELAY-1

1.

Turn ignition switch OFF.

2.

Disconnect battery cable from negative terminal.

3.

Remove engine restart bypass relay.

4.

Check the continuity between engine restart bypass relay termi-
nal and engine restart bypass relay body.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace engine restart bypass relay.

2.

CHECK ENGINE RESTART BYPASS RELAY-2

Engine restart bypass control relay

Condition

Continuity

+

−

Terminal

3

5

12 V direct current supply 
between terminals 1 and 2

Existed

No current supply

Not existed

JSBIA0671ZZ

+

−

Continuity

Engine restart bypass 

relay

Terminal

1

Body

Existed

JSBIA1735ZZ

P1656 ENGINE RESTART BYPASS RELAY

ECH-279

< DTC/CIRCUIT DIAGNOSIS >

[HRA2DDT]

C

D

E

F

G

H

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ECH

N

P

O

Check the resistance between engine restart bypass relay terminals
as per the following conditions. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace engine restart bypass relay.

Engine restart bypass relay

Condition

Resistance

(Approx.)

+

−

Terminal

2

3

12 V direct current sup-
ply between terminal 1 
and body

10 m

Ω

No current supply

0 

Ω

JSBIA1736ZZ

ECH-280

< DTC/CIRCUIT DIAGNOSIS >

[HRA2DDT]

P1675 ENGINE COOLANT TEMPERATURE

P1675 ENGINE COOLANT TEMPERATURE

DTC Logic

INFOID:0000000010500750

DTC DETECTION LOGIC

If the cooling fan or other component in the cooling system malfunctions, engine coolant temperature will rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is
indicated.

CAUTION:

When a malfunction is indicated, be sure to replace the coolant. Also, replace the engine oil. 
1.

Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to
use coolant with the proper mixture ratio.

2.

After refilling coolant, run engine to ensure that no water-flow noise is emitted.

DTC CONFIRMATION PROCEDURE

1.

PERFORM COMPONENT FUNCTION CHECK-1

NOTE:
Use component function check to check the overall function of the cooling fan. During this check, a DTC might
not be confirmed.

WARNING:

Never remove the reservoir tank cap when the engine is hot. Serious burns could be caused by high
pressure fluid escaping from the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.

Is the coolant level in the reservoir tank and/or radiator below the
proper range?

YES

>> Proceed to 

ECH-281, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

PERFORM COMPONENT FUNCTION CHECK-2

Confirm whether customer filled the coolant or not.
Did customer fill the coolant?

YES

>> Proceed to 

ECH-281, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM COMPONENT FUNCTION CHECK-3

1.

Start engine and let it idle.

2.

Turn air conditioner switch and blower fan switch ON.

3.

Make sure that cooling fan operates at low speed.

Is the inspection result normal?

YES

>> GO TO 4.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1675

Engine overheating

When engine coolant temperature is too high.

• Cooling fan
• Radiator hose
• Radiator
• Radiator  cap
• Water pump
• Thermostat
• Engine coolant bypass valve
• Engine coolant temperature sensor

SEF621W

P1675 ENGINE COOLANT TEMPERATURE

ECH-281

< DTC/CIRCUIT DIAGNOSIS >

[HRA2DDT]

C

D

E

F

G

H

I

J

K

L

M

A

ECH

N

P

O

NO

>> Proceed to 

ECH-281, "Diagnosis Procedure"

.

4.

PERFORM COMPONENT FUNCTION CHECK-4

1.

Turn ignition switch OFF.

2.

Turn air conditioner switch and blower fan switch OFF.

3.

Disconnect engine coolant temperature sensor harness connector.

4.

Connect 150

Ω

 resistor to engine coolant temperature sensor harness connector.

5.

Restart engine and make sure that cooling fan operates at higher speed than low speed.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

ECH-281, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010500751

1.

CHECK COOLING FAN OPERATION

Check cooling fan operation.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning part.

2.

CHECK COOLING SYSTEM FOR LEAK-1

Check cooling system for leak.

Is leakage detected?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK COOLING SYSTEM FOR LEAK-2

Check the following for leak.
• Hose
• Radiator
• Radiator cap
• Water pump
• Reservoir tank

>> Repair or replace malfunctioning part.

4.

CHECK RADIATOR CAP

Check radiator cap.
Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace radiator cap.

5.

CHECK ENGINE COOLANT BYPASS VALVE

Check engine coolant bypass valve system.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts.

6.

CHECK THERMOSTAT

Check thermostat.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace thermostat.

7.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Check engine coolant temperature sensor routing circuit. Refer to 

ECH-168, "Diagnosis Procedure"

.

Is the inspection result normal?