Nissan Frontier D22. Manual — part 485

DTC P1148, P1168 CLOSED LOOP CONTROL

EC-1043

[VG33E]

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EC

2.

Set voltmeter probes between ECM terminal 50 [HO2S1 (B1)
signal] or 51 [HO2S1 (B2) signal] and engine ground.

3.

Check the following with engine speed held at 2,000 rpm con-
stant under no-load.

–

The voltage should go above 0.70V at least once.

–

The voltage should go below 0.21V at least once.

4.

If NG, go to

EC-1043, "Diagnostic Procedure"

.

Diagnostic Procedure

UBS00DNW

Perform trouble diagnosis for DTC P0133, P0153,

EC-783, "Diagnostic Procedure"

.

SEF919UA

EC-1044

[VG33E]

DTC P1217 ENGINE OVER TEMPERATURE (OVERHEAT)

DTC P1217 ENGINE OVER TEMPERATURE (OVERHEAT)

PFP:00021

On Board Diagnosis Logic

UBS00DNX

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.
This self-diagnosis has one trip detection logic.

CAUTION:

When a malfunction is indicated be sure to replace the coolant, follow the procedure in

MA-26,

"Changing Engine Coolant"

. Also, replace the engine oil. Refer to

MA-30, "Changing Engine Oil"

.

1.

Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute like pouring
coolant by kettle. Be sure to use coolant with the proper mixture ratio. Refer to

MA-14, "ANTI-

FREEZE COOLANT MIXTURE RATIO"

.

2.

After refilling coolant, run engine to ensure that no water-flow noise is emitted.

Overall Function Check

UBS00DNY

Use this procedure to check the overall function of the cooling fan. During this check, a DTC might not be con-
firmed.

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.

WITH CONSULT-II

1.

Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to

EC-1045,

"Diagnostic Procedure"

.

2.

Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to

EC-1045,

"Diagnostic Procedure"

.

3.

Start engine.

4.

Make sure that cooling fan (crankshaft driven) operates.

5.

If NG, go to

EC-1045, "Diagnostic Procedure"

.

WITH GST

1.

Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below the proper range, skip the following steps
and go to

EC-1045, "Diagnostic Procedure"

.

2.

Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps
and go to

EC-1045, "Diagnostic Procedure"

.

3.

Start engine and make sure that cooling fan (crankshaft driven) operates.
Be careful not to overheat engine.

4.

If NG, go to

EC-1045, "Diagnostic Procedure"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1217

Engine over tempera-
ture (Overheat)

●

Cooling fan does not operate properly
(Overheat).

●

Cooling fan system does not operate prop-
erly (Overheat).

●

Engine coolant was not added to the sys-
tem using the proper filling method.

●

Engine coolant is not within the specified
range.

●

Cooling fan (crankshaft driven)

●

Radiator hose

●

Radiator

●

Radiator cap

●

Water pump

●

Thermostat

For more information, refer to

EC-1046,

"Main 12 Causes of Overheating"

.

SEF621W

DTC P1217 ENGINE OVER TEMPERATURE (OVERHEAT)

EC-1045

[VG33E]

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Diagnostic Procedure

UBS00DNZ

1.

CHECK COOLING FAN (CRANKSHAFT DRIVEN) OPERATION

Start engine and make sure that cooling fan (crankshaft driven) operates.

OK or NG

OK

>> GO TO 2.

NG

>> Check cooling fan (crankshaft driven). Refer to

CO-32, "COOLING FAN (CRANKSHAFT

DRIVEN)"

.

2.

CHECK COOLING SYSTEM FOR LEAK

Apply pressure to the cooling system with a tester, and check if the pressure drops.

CAUTION:

Higher than the specified pressure may cause radiator damage.

Pressure should not drop.

OK or NG

OK

>> GO TO 3.

NG

>> Check the following for leak

●

Hose

●

Radiator

●

Water pump
Refer to

CO-25, "WATER PUMP"

.

3.

CHECK RADIATOR CAP

Apply pressure to cap with a tester and check radiator cap relief
pressure.

OK or NG

OK

>> GO TO 4.

NG

>> Replace radiator cap.

4.

CHECK THERMOSTAT

1.

Check valve seating condition at normal room temperatures.
It should seat tightly.

2.

Check valve opening temperature and valve lift.

3.

Check if valve is closed at 5

°C (9°F) below valve opening tem-

perature.

For details, refer to

CO-28, "THERMOSTAT"

.

OK or NG

OK

>> GO TO 5.

NG

>> Replace thermostat

Testing pressure: 157 kPa (1.6 kg/cm, 23 psi)

SLC754A

Radiator cap
relief pressure

: 59 - 98 kPa (0.6 - 1.0 kg/cm

2

, 9 - 14

psi)

SLC755A

Valve opening
temperature

: 76.5

°C (170°F) [standard]

Valve lift

: More than 10 mm/90

°C (0.39 in/194°F)

SLC343

EC-1046

[VG33E]

DTC P1217 ENGINE OVER TEMPERATURE (OVERHEAT)

5.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Check resistance as shown in the figure.
<Reference data>

OK or NG

OK

>> GO TO 6.

NG

>> Replace engine coolant temperature sensor.

6.

CHECK MAIN 12 CAUSES

If the cause cannot be isolated, go to

EC-1046, "Main 12 Causes of Overheating"

.

>> INSPECTION END.

Main 12 Causes of Overheating

UBS00DO0

Temperature

°C (°F)

Resistance k

Ω

20 (68)

2.1 - 2.9

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

SEF152P

SEF012P

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

50 - 50% coolant mixture

See

MA-14

.

3

●

Coolant level

●

Visual

Coolant up to MAX level
in reservoir tank and radi-
ator filler neck

See

MA-26

.

4

●

Radiator cap

●

Pressure tester

59 - 98 kPa

(0.6 - 1.0 kg/cm

2

, 9 - 14

psi) (Limit)

See

CO-23

.

ON*

1

5

●

Coolant leaks

●

Visual

No leaks

See

CO-23

.

ON*

1

6

●

Thermostat

●

Touch the upper and
lower radiator hoses

Both hoses should be hot

See

CO-28

.

ON*

1

7

●

Cooling fan (crank-
shaft driven)

●

Visual

Operating

See

CO-32

.

OFF

8

●

Combustion gas leak

●

Color checker chemical
tester 4 Gas analyzer

Negative

—

ON*

2

9

●

Coolant temperature
gauge

●

Visual

Gauge less than 3/4
when driving

—

●

Coolant overflow to
reservoir tank

●

Visual

No overflow during driv-
ing and idling

See

MA-26

.