Nissan Altima L32. Manual - part 438

 

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Nissan Altima L32. Manual - part 438

 

 

P1148 CLOSED LOOP CONTROL

EC-873

< COMPONENT DIAGNOSIS >

[QR25DE EXCEPT FOR CALIFORNIA]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P1148 CLOSED LOOP CONTROL

DTC Logic

INFOID:0000000004349840

DTC DETECTION LOGIC

NOTE:

DTC P1148 is displayed with another DTC for A/F sensor 1.

Perform the trouble diagnosis for the corresponding DTC.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1148

Closed loop control 
function

The closed loop control function for bank 1 does 
not operate even when vehicle is driving in the 
specified condition.

• Harness or connectors

(The A/F sensor 1 circuit is open or short-
ed.)

• A/F sensor 1
• A/F sensor 1 heater

The closed loop control function for bank 2 does 
not operate even when vehicle is driving in the 
specified condition.

EC-874

< COMPONENT DIAGNOSIS >

[QR25DE EXCEPT FOR CALIFORNIA]

P1217 ENGINE OVER TEMPERATURE

P1217 ENGINE OVER TEMPERATURE

DTC Logic

INFOID:0000000004349841

DTC DETECTION LOGIC

NOTE:

• If DTC P1217 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.

• If DTC P1217 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer

to 

EC-866, "DTC Logic"

.

If the cooling fan or another 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. Refer to 

CO-12, "Changing Engine

Coolant"

. Also, replace the engine oil. Refer to 

LU-10, "Changing 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. Refer to 

MA-12, "Engine Oil Recommendation"

.

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 

EC-874, "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 

EC-875, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000004349842

1.

PERFORM COMPONENT FUNCTION CHECK-I

WARNING:

Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pres-

sure 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.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1217

Engine over tempera-
ture (Overheat)

• Cooling fan does not operate properly (Over-

heat).

• Cooling fan system does not operate proper-

ly (Overheat).

• Engine coolant was not added to the system 

using the proper filling method.

• Engine coolant is not within the specified 

range.

• Harness or connectors

(The cooling fan circuit is open or short-
ed.)

• IPDM E/R (Cooling fan relay-1)
• Cooling fan relays-2 and -3
• Cooling fan motor
• Radiator  hose
• Radiator
• Radiator  cap
• Reservoir tank
• Water pump
• Thermostat
• Water control valve

P1217 ENGINE OVER TEMPERATURE

EC-875

< COMPONENT DIAGNOSIS >

[QR25DE EXCEPT FOR CALIFORNIA]

C

D

E

F

G

H

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J

K

L

M

A

EC

N

P

O

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

>> Go to 

EC-875, "Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

PERFORM COMPONENT FUNCTION CHECK-II

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

YES

>> Go to 

EC-875, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM COMPONENT FUNCTION CHECK-III

With CONSULT-III

1. Turn ignition switch ON.

2. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-III.

3. Make sure that cooling fan motors-1 and -2 operate at each speed (LOW/HI).

Without CONSULT-III

Perform IPDM E/R auto active test and check cooling fan motors operation, refer to 

PCS-14, "Diagnosis

Description"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-875, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000004349843

1.

CHECK COOLING FAN OPERATION

With CONSULT-III

1. Turn ignition switch ON.

2. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-III.

3. Make sure that cooling fan motors-1 and -2 operate at each speed (LOW/HI).

Without CONSULT-III

1. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to 

PCS-14, "Diagnosis

Description"

.

2. Make sure that cooling fan motors-1 and -2 operate at each speed (Low/High).
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Go to 

EC-949, "Diagnosis Procedure"

.

2.

CHECK COOLING SYSTEM FOR LEAK-I

Check cooling system for leak. Refer to 

CO-11, "System Inspection"

.

Is leakage detected?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK COOLING SYSTEM FOR LEAK-II

Check the following for leak. Refer to 

CO-11, "System Inspection"

.

• Hose

• Radiator

• Water pump

SEF621W

EC-876

< COMPONENT DIAGNOSIS >

[QR25DE EXCEPT FOR CALIFORNIA]

P1217 ENGINE OVER TEMPERATURE

>> Repair or replace malfunctioning part.

4.

CHECK RADIATOR CAP

Check radiator cap. Refer to 

CO-11, "System Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace radiator cap.

5.

CHECK THERMOSTAT

Check thermostat. Refer to 

CO-21, "Removal and Installation"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace thermostat.

6.

CHECK WATER CONTROL VALVE

Check water control valve. Refer to 

CO-23, "Removal and Installation"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace water control valve

7.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

EC-712, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace engine coolant temperature sensor.

8.

CHECK MAIN 13 CAUSES

If the cause cannot be isolated, check the following.

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-12, "Engine Oil Recommendation"

3

• Coolant level

• Visual

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

CO-12, "Changing Engine 
Coolant"

4

• Radiator cap

• Pressure tester

CO-11, "System Inspection"

ON*

2

5

• Coolant leaks

• Visual

No leaks

CO-11, "System Inspec-
tion"

ON*

2

6

• Thermostat

• Touch the upper and 

lower radiator hoses

Both hoses should be hot

CO-21, "Removal and In-
stallation"

ON*

1

7

• Cooling fan motor

• CONSULT-III

Operating

EC-369, "Component 
Function Check"

OFF

8

• Combustion gas leak

• 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-11, "System Inspec-
tion"

OFF*

4

10

• Coolant return from res-

ervoir tank to radiator

• Visual

Should be initial level in 
reservoir tank

CO-11, "System Inspec-
tion"

OFF

11

• Water control valve

• Remove and inspect 

the valve

Within the specified value

CO-23, "Removal and In-
stallation"

 

 

 

 

 

 

 

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