Infiniti FX35, FX50 (S51). Manual - part 863

P1211 TCS CONTROL UNIT

EC-993

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P1211 TCS CONTROL UNIT

Description

INFOID:0000000005237469

The malfunction information related to TCS is transferred through the CAN communication line from “ABS
actuator and electric unit (control unit)” to ECM.
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:0000000005237470

DTC DETECTION 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 60 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>>

EC-993, "Diagnosis Procedure"

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005237471

Go to 

BRC-5, "Work Flow"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1211

TCS control unit

ECM receives malfunction information from
“ABS actuator and electric unit (control unit)”.

• ABS actuator and electric unit (control unit)
• TCS related parts

EC-994

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

P1212 TCS COMMUNICATION LINE

P1212 TCS COMMUNICATION LINE

Description

INFOID:0000000005237472

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:0000000005237473

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-964, "DTC 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-994, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005237474

Go to 

BRC-5, "Work Flow"

.

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 shorted.)

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

P1217 ENGINE OVER TEMPERATURE

EC-995

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P1217 ENGINE OVER TEMPERATURE

DTC Logic

INFOID:0000000005237475

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-964, "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, always replace the coolant. Refer to 

CO-33, "Draining"

 and 

CO-34,

"Refilling"

. Also, replace the engine oil. Refer to 

LU-26, "Draining"

 and 

LU-27, "Refilling"

.

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, "Anti-Freeze Coolant Mixture Ratio"

.

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-995, "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-996, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000005237476

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 temperature 
(Overheat)

• Cooling fan does not operate properly 

(Overheat).

• Cooling fan system does not operate 

properly (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 shorted.)

• IPDM E/R
• Cooling fan control module
• Cooling fan motor
• Radiator hose
• Radiator
• Radiator  cap
• Water pump
• Thermostat

EC-996

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

P1217 ENGINE OVER TEMPERATURE

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-996, "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-996, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM COMPONENT FUNCTION CHECK-III

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with CONSULT-III.

3.

Check that cooling fan speed varies according to the percentage.

 Without CONSULT-III

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

PCS-11, "Diagnosis

Description"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-996, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005237477

1.

CHECK COOLING FAN OPERATION

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with CONSULT-III.

3.

Check that cooling fan speed varies according to the percentage.

 Without CONSULT-III

1.

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

PCS-11, "Diagnosis

Description"

.

2.

Check that cooling fan operates.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Go to 

EC-1096, "Diagnosis Procedure"

.

2.

CHECK COOLING SYSTEM FOR LEAKAGE-I

Check cooling system for leakage. Refer to 

CO-33, "Inspection"

.

Is leakage detected?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK COOLING SYSTEM FOR LEAKAGE-II

Check the following for leakage.
• Hose
• Radiator
• Water pump

SEF621W