Nissan Frontier. Manual - part 448

P117A AIR FUEL RATIO

EC-363

< DTC/CIRCUIT DIAGNOSIS >

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2. Crank engine for approximately 3 seconds, and recheck whether spark is generated between the spark

plug and the grounded portion.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

NO

>> Replace spark plug(s) with standard type one(s). For spark plug type, refer to 

EM-108, "Standard

and Limit"

.

Spark should be generated.

EC-364

< DTC/CIRCUIT DIAGNOSIS >

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P1212 TCS COMMUNICATION LINE

P1212 TCS COMMUNICATION LINE

Description

INFOID:0000000009481043

This CAN communication line is used to control the smooth engine operation during the TCS operation. Pulse

signals are exchanged between ECM and “ABS actuator and electric unit (control unit)”.

Be sure to erase the malfunction information such as DTC not only for “ABS actuator and electric unit

(control unit)” but also for ECM after TCS related repair.

DTC Logic

INFOID:0000000009481044

DTC DETECTION LOGIC

NOTE:

• If DTC P1212 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.

• If DTC P1212 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer

to 

EC-349, "On Board Diagnosis Logic"

.

Freeze frame data is not stored in the ECM for this self-diagnosis.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for at least 10 seconds.

2. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Go to 

EC-364, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

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Go to 

BRC-8, "Work Flow"

 (TYPE 2) or 

BRC-120, "Work Flow"

 (TYPE 3).

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1212

TCS communication line

ECM cannot receive the information from 
“ABS actuator and electric unit (control 
unit)” continuously.

• Harness or connectors

(The CAN communication line is open or short-
ed.)

• ABS actuator and electric unit (control unit)
• Dead (Weak) battery

P1217 ENGINE OVER TEMPERATURE

EC-365

< DTC/CIRCUIT DIAGNOSIS >

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P1217 ENGINE OVER TEMPERATURE

On Board Diagnosis Logic

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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 the one trip detection logic.

CAUTION:

When a malfunction is indicated, always replace the coolant. Refer to 

CO-12, "Changing Engine Cool-

ant"

, “Changing Engine Coolant”. Also, replace the engine oil. 

1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Always use

coolant with the proper mixture ratio. Refer to 

MA-16, "FOR USA AND CANADA : Fluids and Lubri-

cants"

.

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

Overall Function Check

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Use this procedure to check the overall function of the engine coolant over temperature enrichment protection

check, a DTC might not be confirmed.

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

1. Check the coolant level in the reservoir tank and radiator.

NOTE:

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-366,

"Diagnosis Procedure"

.

2. Confirm whether customer filled the coolant or not. If customer

filled the coolant, skip the following steps and go to 

EC-366,

"Diagnosis Procedure"

.

3. Start engine.

4. Make sure that cooling fan (crankshaft driven) operates.

5. If NG, go to 

EC-366, "Diagnosis Procedure"

.

 WITH GST

1. Check the coolant level in the reservoir tank and radiator.

NOTE:

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-366, "Diagnosis Procedure"

.

2. Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps

and go to 

EC-366, "Diagnosis Procedure"

.

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

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1217

Engine over temperature 
(Overheat)

• Cooling fan does not operate properly 

(Overheat).

• Cooling fan system does not operate 

properly (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
• Engine coolant temperature sensor
For more information, refer to 

EC-367, "Main 

12 Causes of Overheating"

.

SEF621W

EC-366

< DTC/CIRCUIT DIAGNOSIS >

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P1217 ENGINE OVER TEMPERATURE

CAUTION:

Be careful not to overheat engine.

4. If NG, go to 

EC-366, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009481048

1.

CHECK COOLING FAN (CRANKSHAFT DRIVEN) OPERATION

1. Start engine and let it idle.

2. Make sure that cooling fan (crankshaft driven) operates normally.
OK or NG

OK

>> GO TO 2.

NG

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

CO-19, "Exploded View"

.

2.

CHECK COOLING SYSTEM FOR LEAK

Refer to 

CO-11, "System Inspection"

.

OK or NG

OK

>> GO TO 3.

NG

>> Check the following for leak. 

• Hose

• Radiator

• Water pump

• Reservoir tank

3.

CHECK RADIATOR CAP

Refer to 

CO-16, "Exploded View"

.

OK or NG

OK

>> GO TO 4.

NG

>> Replace radiator cap.

4.

CHECK THERMOSTAT

Refer to 

CO-23, "Exploded View"

.

OK or NG

OK

>> GO TO 5.

NG

>> Replace thermostat. Refer to 

CO-23, "Removal and Installation Thermostat"

.

5.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

EC-183, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

>> Replace engine coolant temperature sensor. Refer to 

CO-23, "Exploded View"

.

6.

CHECK MAIN 12 CAUSES

If the cause cannot be isolated, go to 

EC-367, "Main 12 Causes of Overheating"

.

>> INSPECTION END