Nissan Quest E52. Manual - part 534

EC-346

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1217 ENGINE OVER TEMPERATURE

>> Repair or replace malfunctioning part.

4.

CHECK RADIATOR CAP

Check radiator cap. Refer to 

CO-12, "RADIATOR CAP : Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace radiator cap. Refer to 

CO-13, "Exploded View"

.

5.

CHECK THERMOSTAT

Check thermostat. Refer to 

CO-25, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace thermostat. Refer to 

CO-24, "Exploded View"

.

6.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Check engine coolant temperature sensor. Refer to 

EC-194, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace engine coolant temperature sensor. Refer to 

CO-26, "Exploded View"

.

7.

CHECK MAIN 12 CAUSES

If the cause cannot be isolated, check the following.

*1: Turn the ignition switch ON.

*2: Engine running at 3,000 rpm for 10 minutes.

*3: Drive at 90 km/h (56 MPH) for 30 minutes and then let idle for 10 minutes.

*4: After 60 minutes of cool down time.

For more information, refer to 

CO-3, "Troubleshooting Chart"

.

Engine

Step

Inspection item

Equipment

Standard

Reference page

OFF

1

• Blocked radiator
• Blocked condenser
• Blocked radiator grille
• Blocked bumper

• Visual

No blocking

—

2

• Coolant mixture

• Coolant tester

CO-8, "Inspection"

3

• Coolant  level

• Visual

Coolant up to MAX level in 
reservoir tank and radiator 
filler neck

CO-8, "Inspection"

4

• Radiator cap

• Pressure tester

CO-12, "RADIATOR CAP : Inspection"

ON*

2

5

• Coolant leakage

• Visual

No leakage

CO-8, "Inspection"

ON*

2

6

• Thermostat

• Touch the upper and 

lower radiator hoses

Both hoses should be hot

CO-25, "Inspection"

ON*

1

7

• Cooling fan

• CONSULT

Operating

EC-417, "Component 
Function Check"

OFF

8

• Combustion gas leak-

age

• Color checker chemical 

tester 4 Gas analyzer

Negative

—

ON*

3

9

• Coolant temperature 

gauge

• Visual

Gauge less than 3/4 when 
driving

—

• Coolant overflow to res-

ervoir tank

• Visual

No overflow during driving 
and idling

CO-8, "Inspection"

OFF*

4

10

• Coolant return from res-

ervoir tank to radiator

• Visual

Should be initial level in 
reservoir tank

CO-8, "Inspection"

OFF

11

• Cylinder head

• Straight gauge feeler 

gauge

0.1 mm (0.004 in) Maxi-
mum distortion (warping)

EM-101, "Inspection"

12

• Cylinder block and pis-

tons

• Visual

No scuffing on cylinder 
walls or piston

EM-113, "Inspection"

P1217 ENGINE OVER TEMPERATURE

EC-347

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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>> INSPECTION END

EC-348

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1225 TP SENSOR

P1225 TP SENSOR

DTC Logic

INFOID:0000000009651190

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Turn ignition switch ON.

4.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-348, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009651191

1.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1.

Turn ignition switch OFF.

2.

Remove the intake air duct. Refer to 

EM-26, "Exploded View"

.

3.

Check if foreign matter is caught between the throttle valve (1)
and the housing.

-

Electric throttle control actuator (2)

-

: Vehicle front

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Remove the foreign matter and clean the electric throttle

control actuator inside, and then perform throttle valve
closed position learning. Refer to 

EC-136, "Description"

.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace electric throttle control actuator. Refer to 

EM-28, "Exploded View"

.

2.

Go to 

EC-137, "Description"

.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1225

Closed throttle position 
learning performance

Closed throttle position learning value is exces-
sively low.

• Electric throttle control actuator

(TP sensor 1 and 2)

JMBIA1132ZZ

P1226 TP SENSOR

EC-349

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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EC

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P1226 TP SENSOR

DTC Logic

INFOID:0000000009651192

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Turn ignition switch ON.

4.

Repeat steps 2 and 3 for 32 times.

5.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-349, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009651193

1.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1.

Turn ignition switch OFF.

2.

Remove the intake air duct. Refer to 

EM-26, "Exploded View"

.

3.

Check if foreign matter is caught between the throttle valve (1)
and the housing.

-

Electric throttle control actuator (2)

-

: Vehicle front

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Remove the foreign matter and clean the electric throttle

control actuator inside, and then perform throttle valve
closed position learning. Refer to 

EC-136, "Description"

.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace electric throttle control actuator. Refer to 

EM-28, "Exploded View"

.

2.

Go to 

EC-137, "Description"

.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1226

Closed throttle position 
learning performance

Closed throttle position learning is not per-
formed successfully, repeatedly.

• Electric throttle control actuator

(TP sensor 1 and 2)

JMBIA1132ZZ