Nissan Maxima. Manual — part 481

EC-408

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1217 ENGINE OVER TEMPERATURE

>> Repair or replace malfunctioning part.

4.

CHECK RADIATOR CAP

Check radiator cap. Refer to

CO-10, "System Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace radiator cap.

5.

CHECK THERMOSTAT

Check thermostat. Refer to

CO-22, "Removal and Installation"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace thermostat. Refer to

CO-22, "Removal and Installation"

.

6.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Refer to

EC-203, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace engine coolant temperature sensor. Refer to

CO-24, "Removal and Installation"

.

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.

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

•

MA-15, "FOR USA AND CANADA : Engine Oil Recom-
mendation"

(For NORTH AMERICA)

•

MA-17, "FOR MEXICO : Engine Oil Recommendation"

(For MEXICO)

3

• Coolant level

• Visual

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

CO-10, "System Inspec-
tion"

4

• Radiator cap

• Pressure tester

CO-10, "System Inspection"

ON*

2

5

• Coolant leakage

• Visual

No leakage

CO-10, "System Inspec-
tion"

ON*

2

6

• Thermostat

• Touch the upper and

lower radiator hoses

Both hoses should be hot

CO-22, "Removal and In-
stallation"

ON*

1

7

• Cooling fan

• CONSULT

Operating

EC-486, "Component Func-
tion 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-10, "System Inspec-
tion"

OFF*

4

10

• Coolant return from res-

ervoir tank to radiator

• Visual

Should be initial level in res-
ervoir tank

CO-10, "System Inspec-
tion"

OFF

11

• Cylinder head

• Straight gauge feeler

gauge

0.1 mm (0.004 in) Maximum
distortion (warping)

EM-95, "Inspection After
Disassembly"

12

• Cylinder block and pis-

tons

• Visual

No scuffing on cylinder
walls or piston

EM-117, "Inspection"

P1217 ENGINE OVER TEMPERATURE

EC-409

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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*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-6, "Troubleshooting Chart"

.

>> INSPECTION END

EC-410

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1225 TP SENSOR

P1225 TP SENSOR

Description

INFOID:0000000010095098

Electric throttle control actuator consists of throttle control motor,

throttle position sensor, etc. The throttle position sensor responds to

the throttle valve movement.

The throttle position sensor has two sensors. These sensors are a

kind of potentiometer which transform the throttle valve position into

output voltage, and emit the voltage signal to the ECM. The ECM

judges the current opening angle of the throttle valve from these sig-

nals and controls the throttle valve opening angle in response to

driving conditions via the throttle control motor.

DTC Logic

INFOID:0000000010095099

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

>> Go to

EC-410, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010095100

1.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1. Turn ignition switch OFF.

2. Remove the intake air duct. Refer to

EM-24, "Removal and Installation"

.

PBIB0145E

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)

P1225 TP SENSOR

EC-411

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[VQ35DE]

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

and the housing.

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-21, "THROTTLE

VALVE CLOSED POSITION LEARNING : Special

Repair Requirement"

.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1. Replace electric throttle control actuator. Refer to

EM-25, "Removal and Installation"

.

2. Go to

EC-21, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000010095101

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to

EC-21, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to

EC-21, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

2: Electric throttle control actuator

: Vehicle front

ALBIA0611ZZ