Nissan Maxima. Instruction — 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
.
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
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
4
• Radiator cap
• Pressure tester
ON*
2
5
• Coolant leakage
• Visual
No leakage
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
OFF*
4
10
• Coolant return from res-
ervoir tank to radiator
• Visual
Should be initial level in res-
ervoir tank
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
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
.
>> 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
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
< DTC/CIRCUIT DIAGNOSIS >
[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
VALVE CLOSED POSITION LEARNING : Special
.
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
EC-21, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 2.
2.
PERFORM IDLE AIR VOLUME LEARNING
EC-21, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
2: Electric throttle control actuator
: Vehicle front
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