Infiniti QX56 (Z62). Manual - part 952

MWI-62

< DTC/CIRCUIT DIAGNOSIS >

B2267 ENGINE SPEED

B2267 ENGINE SPEED

Description

INFOID:0000000006221737

The engine speed signal is transmitted from ECM to the combination meter via CAN communication.

DTC Logic

INFOID:0000000006221738

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000006221739

1.

PERFORM SELF-DIAGNOSIS OF ECM

Perform “Self Diagnostic Result” of ECM, and repair or replace malfunctioning parts.

>> Refer to 

EC-98, "DTC Index"

.

DTC

Display contents of 

CONSULT-III

Diagnostic item is detected when...

Probable malfunction location

B2267

ENGINE SPEED

ECM continuously transmits abnormal engine 
speed signals for 2 seconds or more 

• Crankshaft position sensor (POS)
• ECM

MWI

B2268 WATER TEMP

MWI-63

< DTC/CIRCUIT DIAGNOSIS >

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B2268 WATER TEMP

Description

INFOID:0000000006221740

The engine coolant temperature signal is transmitted from ECM to the combination meter via CAN communi-
cation.

DTC Logic

INFOID:0000000006221741

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000006221742

1.

PERFORM SELF-DIAGNOSIS OF ECM

Perform “Self Diagnosis Result” of ECM, and repair or replace malfunctioning parts.

>> Refer to 

EC-98, "DTC Index"

.

DTC

Display contents of 

CONSULT-III

Diagnostic item is detected when...

Probable malfunction location

B2268

WATER TEMP

ECM continuously transmits abnormal engine 
coolant temperature signals for 60 seconds or 
more 

• Engine coolant temperature sensor
• ECM

MWI-64

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

COMBINATION METER

COMBINATION METER : Diagnosis Procedure

INFOID:0000000006221743

1.

CHECK FUSE

Check for blown fuses.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Be sure to eliminate cause of malfunction before installing new fuse.

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between combination meter harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness between combination meter and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect combination meter connector.

3.

Check continuity between combination meter harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

Power source

Fuse No.

Battery

11

Ignition switch ON or START 

3

Terminals

Ignition switch po-

sition

Voltage

(Approx.)

(+)

(

−

)

Combination meter

Ground

Connector

Terminal

M34

1

OFF

Battery voltage

2

ON

Combination meter

Ground

Continuity

Connector

Terminal

M34

3

Existed

23

MWI

TRIP RESET AND ILLUMINATION CONTROL SWITCH SIGNAL CIRCUIT

MWI-65

< DTC/CIRCUIT DIAGNOSIS >

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TRIP RESET AND ILLUMINATION CONTROL SWITCH SIGNAL CIRCUIT

Diagnosis Procedure

INFOID:0000000006221744

1.

CHECK COMBINATION METER INPUT SIGNAL

1.

Turn ignition switch ON.

2.

Measure voltage between the following terminals of the combination meter.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK TRIP RESET AND ILLUMINATION CONTROL SWITCH SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect combination meter connector and trip reset and illumination control switch connector.

3.

Check continuity between combination meter harness connector and trip reset and illumination control
switch harness connector.

4.

Check continuity between combination meter harness connector and ground.

Is the inspection result normal? 

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK TRIP RESET AND ILLUMINATION CONTROL SWITCH GROUND CIRCUIT

Check continuity between trip reset and illumination control switch connector and ground.

(+)

(

−

)

Condition

Voltage

(Approx.)

Combination meter

Ground

Connector

Terminals

M34

8

When trip reset switch is pressed

0 V

Other than the above

5 V

13

When illumination control switch (+) is pressed

0 V

Other than the above

5 V

14

When illumination control switch (

−

) is pressed

0 V

Other than the above

5 V

Terminals

Continuity

Combination meter

Trip reset and illumination control switch

Connector

Terminal

Connector

Terminal

M34

8

M83

5

Existed

13

3

14

4

Combination meter

Ground

Continuity

Connector

Terminal

M34

8

Not existed

13

14

Trip reset and illumination control switch

Ground

Continuity

Connector

Terminal

M83

6

Existed