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Nissan Xterra. Manual - part 312

EC-374

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P1212 TCS COMMUNICATION LINE

P1212 TCS COMMUNICATION LINE

Description

INFOID:0000000009484099

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

EC-365

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.

On Board Diagnosis Logic

INFOID:0000000009484100

Freeze frame data is not stored in the ECM for this self-diagnosis. The MIL will not illuminate for this

self-diagnosis.

DTC Confirmation Procedure

INFOID:0000000009484101

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 10.5V at idle.
1. Start engine and let it idle for at least 10 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to

EC-374, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000009484102

Go to

BRC-8, "Work Flow"

BRC-118, "Work Flow"

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1212
1212

TCS communication line

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

• 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-375

< DTC/CIRCUIT DIAGNOSIS >

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P1217 ENGINE OVER TEMPERATURE

On Board Diagnosis Logic

INFOID:0000000009484103

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

EC-365

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-11, "Changing Engine Cool-

ant"

. Also, replace the engine oil. Refer to

LU-8, "Changing 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-13, "SAE Viscosity Number"

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

Overall Function Check

INFOID:0000000009484104

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 and/or reservoir tank cap when the engine is hot. Serious burns could

be caused by high pressure fluid escaping from the radiator and/or reservoir tank.

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.

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-376,

"Diagnosis Procedure"

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

filled the coolant, skip the following steps and go to

EC-376,

"Diagnosis Procedure"

3. Turn ignition switch ON.
4. Perform “COOLING FAN” in “ACTIVE TEST” mode with CON-

SULT.

5. If the results are NG, go to

EC-376, "Diagnosis Procedure"

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1217
1217

Engine over tempera-
ture (Overheat)

• Cooling fan does not operate properly (Over-

heat).

• Cooling fan system does not operate proper-

ly (Overheat).

• Engine coolant level 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
• Cooling fan (Crankshaft driven)
• Radiator hose
• Radiator
• Radiator cap
• Reservoir tank
• Reservoir tank cap
• Water pump
• Thermostat
For more information, refer to

EC-377,

"Main 12 Causes of Overheating"

SEF621W

EC-376

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P1217 ENGINE OVER TEMPERATURE

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-376,

"Diagnosis Procedure"

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

filled the coolant, skip the following steps and go to

EC-376,

"Diagnosis Procedure"

3. Perform IPDM E/R auto active test and check cooling fan motor

operation, refer to

PCS-9, "Diagnosis Description"

4. If NG, go to

EC-376, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000009484105

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 (With CONSULT)>>GO TO 2.

OK (Without CONSULT)>>GO TO 3.

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

CO-18, "Removal and Installation (Crankshaft

driven type)"

CHECK COOLING FAN OPERATION

With CONSULT

1. Start engine and let it idle.

2. Select “COOLING FAN” in “ACTIVE TEST” mode with CONSULT.

3. Make sure that cooling fan operates at each speed (LOW/HI).
OK or NG

>> GO TO 4.

>> Check cooling fan control circuit. (Procedure to “PROCEDURE A”.)

CHECK COOLING FAN OPERATION

Without CONSULT

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

PCS-9, "Diagnosis

Description"

2. Make sure that cooling fan operates at each speed (Low/High).
OK or NG

>> GO TO 4.

>> Check cooling fan control circuit. (Procedure to “PROCEDURE A”.)

CHECK COOLING SYSTEM FOR LEAK

Refer to

CO-10, "System Inspection"

OK or NG

>> GO TO 5.

>> Check the following for leak. Refer to

CO-10, "System Inspection"

• Hose

• Radiator

• Radiator cap

• Reservoir tank

• Water pump

CHECK RESERVOIR TANK CAP

Refer to

CO-10, "System Inspection"

OK or NG

SEF621W

P1217 ENGINE OVER TEMPERATURE

EC-377

< DTC/CIRCUIT DIAGNOSIS >

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>> GO TO 6.

>> Replace reservoir tank cap.

CHECK COMPONENT PARTS

Check the following

• Thermostat. Refer to

CO-26, "Removal and Installation"

• Engine coolant temperature sensor. Refer to

EC-187, "Component Inspection"

OK or NG

>> GO TO 7.

>> Replace malfunctioning component.

CHECK MAIN 12 CAUSES

If the cause cannot be isolated, go to

EC-377, "Main 12 Causes of Overheating"

>> INSPECTION END

Main 12 Causes of Overheating

INFOID:0000000009484106

*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.

Engine

Step

Inspection item

Equipment

Standard

Reference page

OFF

• Blocked radiator
• Blocked condenser
• Blocked radiator grille
• Blocked bumper

• Visual

No blocking

—

• Coolant mixture