Infiniti QX56 (Z62). Manual - part 605

EC-398

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P1197 OUT OF GAS

Diagnosis Procedure

INFOID:0000000006217905

1.

REFUEL THE VEHICLE

1.

Refuel 10 liter (10 US qt, 8 imp qt).

CAUTION:

Never refuel more than 10 liter.

2.

Start the engine and keep the engine speed at 3,000 rpm for 30 seconds.
NOTE:
For best results, warm up the engine until “COOLAN TEMP/S” on “DATA MONITOR” of CONSULT-III
reaches at least 70

°

C (158

°

F).

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Turn ignition switch ON.

5.

Turn ignition switch OFF and wait at least 10 seconds.

6.

Turn ignition switch ON.

7.

Erase the DTC.

8.

Start the engine and let it idle at least 60 seconds.

9.

Perform the confirmation procedure again. Refer to 

EC-397, "DTC Logic"

.

Is 1st trip DTC detected?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

CHECK LOW PRESSURE FUEL PUMP

Refer to 

EC-512, "Component Function Check"

.

Is inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK HIGH PRESSURE FUEL PUMP

Refer to 

EC-501, "Component Function Check"

.

Is inspection result normal?

YES

>> Check the fuel hose for disconnection and looseness.

NO

>> Repair or replace error-detected parts.

P1212 TCS COMMUNICATION LINE

EC-399

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P1212 TCS COMMUNICATION LINE

Description

INFOID:0000000006217906

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:0000000006217907

DTC DETECTION LOGIC

NOTE:
• If DTC P1212 is displayed with DTC UXXXX, perform the trouble diagnosis for DTC UXXXX.
• If DTC P1212 is displayed with DTC P0607,  perform the trouble diagnosis for DTC P0607. 
Freeze frame data is not stored in the ECM for this self-diagnosis.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 10.5 V or more 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

>> Proceed to 

EC-399, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217908

Perform the trouble diagnosis for TCS. Refer to 

BRC-60, "Work Flow"

.

NOTE:
If DTC P1212 is displayed with DTC UXXXX and/or P0607, perform the following trouble diagnosis.
• Trouble diagnosis for DTC UXXXX Refer to 

EC-98, "DTC Index"

.

• Trouble diagnosis for DTC P0607 Refer to 

EC-378, "DTC Logic"

.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1212

TCS/CIRC
(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

EC-400

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P1217 ENGINE OVER TEMPERATURE

P1217 ENGINE OVER TEMPERATURE

DTC Logic

INFOID:0000000006217909

DTC DETECTION LOGIC

NOTE:
• If DTC P1217 is displayed with DTC UXXXX, perform the trouble diagnosis for DTC UXXXX.
• If DTC P1217 is displayed with DTC P0607, perform the trouble diagnosis for DTC P0607. Refer to

EC-378, "DTC Logic"

.

• If DTC P1217 is displayed with DTC P0527, perform the trouble diagnosis for DTC P0527. Refer to

EC-367, "DTC Logic"

.

If the cooling fan or any of other components in the cooling system has a malfunction, engine coolant temper-
ature increases.
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-8, "Draining"

 and 

CO-9,

"Refilling"

. Also, replace the engine oil. Refer to 

LU-8, "Draining"

 and 

LU-8, "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-11, "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-400, "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-401, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000006217910

1.

PERFORM COMPONENT FUNCTION CHECK-I

WARNING:

Never remove the reservoir tank cap when the engine is hot. Serious burns could be caused by high
pressure 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 is not within the specified 

quantity.

• Harness or connectors

(The cooling fan circuit is open or shorted.)

• IPDM E/R
• Electrically-controlled cooling fan coupling
• Cooling fan speed sensor
• Radiator hose
• Radiator
• Reservoir tank cap
• Water pump
• Thermostat

P1217 ENGINE OVER TEMPERATURE

EC-401

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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

>> Proceed to 

EC-401, "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

>> Proceed to 

EC-401, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

PERFORM COMPONENT FUNCTION CHECK-III

 WITH CONSULT-III

1.

Start the engine.

2.

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

3.

Check that cooling fan speed varies according to the percentage.
NOTE:
Fan speed changes as the percentage changes.

 WITHOUT CONSULT-III

1.

Start the engine.

2.

Perform IPDM E/R auto active test. Refer to 

PCS-10, "Diagnosis Description"

.

3.

Check that cooling fan speed increase.
NOTE:
Speed changes gradually when performing the auto active test.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-401, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006217911

1.

CHECK COOLING FAN OPERATION

 WITH CONSULT-III

1.

Start the engine.

2.

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

3.

Check that cooling fan speed varies according to the percentage.
NOTE:
Speed changes gradually as the percentage changes.

 WITHOUT CONSULT-III

1.

Stert the engine.

2.

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

PCS-10, "Diagnosis Descrip-

tion"

.

3.

Check that cooling fan speed increase.
NOTE:
Speed changes gradually when performing the auto active test.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Proceed to 

EC-495, "Diagnosis Procedure"

.

2.

CHECK ENGINE COOLANT LEAKAGE-I

Check cooling system for leakage. Refer to 

CO-8, "Inspection"

.

Is leakage detected?

SEF621W