Nissan Qashqai J11. Manual - part 550

EC9-356

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1675 ENGINE COOLANT TEMPERATURE

P1675 ENGINE COOLANT TEMPERATURE

DTC Logic

INFOID:0000000010507878

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

Perform component function check. Refer to 

EC9-356, "Component Function Check"

.

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

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC9-357, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000010507879

1.

PERFORM COMPONENT FUNCTION CHECK-1

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 

EC9-357, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

PERFORM COMPONENT FUNCTION CHECK-2

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1675

—
(—)

When engine coolant temperature is too high.

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

valve

• Engine coolant temper-

ature sensor

SEF621W

P1675 ENGINE COOLANT TEMPERATURE

EC9-357

< DTC/CIRCUIT DIAGNOSIS >

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Confirm whether customer filled the coolant or not.

Did customer fill the coolant?

YES

>> Proceed to 

EC9-357, "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.

NO

>> Proceed to 

EC9-357, "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 

EC9-357, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010507880

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. Refer to 

EC9-382, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 6.

EC9-358

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1675 ENGINE COOLANT TEMPERATURE

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 

EC9-203, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Perform overheating cause analysis. Refer to 

CO-87, "Troubleshooting Chart"

.

NO

>> Replace engine coolant temperature sensor.

P2002 DIESEL PARTICULATE FILTER

EC9-359

< DTC/CIRCUIT DIAGNOSIS >

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P2002 DIESEL PARTICULATE FILTER

DTC Logic

INFOID:0000000010309370

DTC DETECTION LOGIC

NOTE:
If DTC P2002 is displayed with following DTC, perform the trouble diagnosis for following DTC. Refer
to 

EC9-108, "DTC Index"

.

• DTC U0101, U0121, U0415, P0001, P0002, P0045, P0100, P0101, P0102, P0105, P0106, P0115, P0190,

P0200, P0201, P0202, P0203, P0204, P0225, P0226, P0335, P0402, P0470, P0471, P0487, P0488,
P0544, P0560, P060A, P061A, P062B, P0638, P0641, P0651, P0697, P1544, P160C, P160D, P1641,
P1642, P1643, P1650, P2080, P2100, P2119, P2120, P2226, P2263 and P253F.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC P2002 can not duplicate.

>> Proceed to 

EC9-359, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010309371

1.

CHECK DIESEL PARTICULATE FILTER

Refer to 

EC9-359, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace diesel particulate filter.

2.

CHECK INTAKE AIR SYSTEM

Check the intake air system for leakage.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts and then GO TO 3.

3.

PERFORM SELF-DIAGNOSIS

Perform “Self-diagnostic results” of “ENGINE” using CONSULT.

Is any DTC detected?

YES

>> Replace diesel particulate filter.

NO

>> Perform “SERVICE REGENERATION”. Refer to 

EC9-154, "Work Procedure"

.

Component Inspection

INFOID:0000000010309372

1.

CHECK DIESEL PARTICULATE FILTER

Check diesel particulate filter for damage.

Is the inspection result normal?

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P2002

PARTICLE FILTER
(Diesel particulate filter efficiency 
below threshold bank 1)
• 1.DEF:CLOGGED
• 2.DEF: COMPONENT IN 

POOR CONDITION

• 3.DEF: OFFSET IMPLAUSI-

BLE

Diesel particulate filter function does not op-
erate properly.

Diesel particulate filter