Infiniti FX35 / FX45. Manual - part 567

 

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Infiniti FX35 / FX45. Manual - part 567

 

 

DTC P1212 TCS COMMUNICATION LINE

EC-1029

< SERVICE INFORMATION >

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DTC P1212 TCS COMMUNICATION LINE

Description

INFOID:0000000001326892

NOTE:
• If DTC P1212 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC

U1000, U1001. Refer to 

EC-724

.

• If DTC P1212 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer

to 

EC-726

.

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:0000000001326893

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

DTC Confirmation Procedure

INFOID:0000000001326894

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-1029, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001326895

Go to 

BRC-13

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1212
1212

TCS communication line

ECM can not 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

EC-1030

< SERVICE INFORMATION >

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DTC P1217 ENGINE OVER TEMPERATURE

DTC P1217 ENGINE OVER TEMPERATURE

Description

INFOID:0000000001326896

SYSTEM DESCRIPTION

NOTE:
• If DTC P1217 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC

U1000, U1001. Refer to 

EC-724

.

• If DTC P1217 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer

to 

EC-726

.

Cooling Fan Control

*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.

*2: This signal is sent to ECM through CAN communication line.

The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 3-step control [HIGH/MIDDLE/OFF].

Cooling Fan Operation

Cooling Fan Relay Operation

The ECM controls cooling fan relays in the IPDM E/R through CAN communication line.

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

1

Cooling fan 
control

IPDM E/R
(Cooling fan relay)

Battery

Battery voltage*

1

Wheel sensor

Vehicle speed*

2

Engine coolant temperature sensor

Engine coolant temperature

Air conditioner switch

Air conditioner ON signal*

2

Refrigerant pressure sensor

Refrigerant pressure

PBIB2560E

DTC P1217 ENGINE OVER TEMPERATURE

EC-1031

< SERVICE INFORMATION >

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COMPONENT DESCRIPTION

Cooling Fan Motor

The cooling fan at each speed when the current flows in the cooling fan motor as follows.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000001326897

Specification data are reference values.

On Board Diagnosis Logic

INFOID:0000000001326898

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, be sure to replace the coolant. Refer to 

CO-37, "Changing Engine

Coolant"

. Also, replace the engine oil. Refer to 

LU-24, "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-10, "Anti-Freeze Coolant Mixture Ratio"

.

Cooling fan speed

Cooling fan relay

1

3

Stop (OFF)

OFF

OFF

Middle (MID)

OFF

ON

High (HI)

ON

ON

Cooling fan speed

Cooling fan motor terminals

(+)

(-)

Middle (MID)

1

3 and 4

2

3 and 4

High (HI)

1 and 2

3 and 4

MONITOR ITEM

CONDITION

SPECIFICATION

COOLING FAN

• Engine: After warming up, idle the 

engine

• Air conditioner switch: OFF

Engine coolant temperature is 94

°

(201

°

F) or less

OFF

Engine coolant temperature is between 
95

°

C (203

°

F) and 104

°

C (219

°

F)

MID

Engine coolant temperature is 105

°

(221

°

F) or more

HI

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 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
• Radiator hose
• Radiator
• Radiator  cap
• Water pump
• Thermostat
• Water control valve
For more information, refer to 

EC-1039, 

"Main 13 Causes of Overheating"

.

EC-1032

< SERVICE INFORMATION >

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DTC P1217 ENGINE OVER TEMPERATURE

2.

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

Overall Function Check

INFOID:0000000001326899

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-III

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-1035,

"Diagnosis Procedure"

.

2.

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

EC-1035,

"Diagnosis Procedure"

.

3.

Turn ignition switch ON.

4.

Perform “COOLING FAN” in “ACTIVE TEST” mode with CON-
SULT-III.

5.

If the results are NG, go to 

EC-1035, "Diagnosis 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-1035,

"Diagnosis Procedure"

.

2.

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

EC-1035,

"Diagnosis Procedure"

.

3.

Disconnect engine coolant temperature sensor harness connec-
tor.

4.

Connect 200

 resister to the engine coolant temperature sensor

harness connector.

5.

Start engine and make sure that cooling fan operates at middle
speed.
Be careful not to overheat engine.
If NG, go to 

EC-1035, "Diagnosis Procedure"

.

If OK, go to the following step.

6.

Turn ignition switch OFF.

7.

Disconnect 200

 resister from engine coolant temperature sen-

sor harness connector.

8.

Connect 150

 resistor to engine coolant temperature sensor

harness connector.

SEF621W

SEF621W

PBIB0965E

 

 

 

 

 

 

 

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