Nissan X-Trail 32. Manual - part 62

AV-240

< DTC/CIRCUIT DIAGNOSIS >

[WITH NAVIGATION]

U1972 EPS

U1972 EPS

DTC Description

INFOID:0000000010923292

DTC DETECTION LOGIC

POSSIBLE CAUSE

EPS control unit

FAIL-SAFE

Around view monitor with Park Assist is cancel

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

WITH CONSULT

1.

Perform “All DTC Reading” with CONSULT. 

2.

Check if the “U1972” is detected as the current malfunction in “Self Diagnostic Result” of “AVM”. 

“U1972” detected as the current malfunction?

YES

>> Refer to 

AV-240, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010923293

1.

CHECK SELF-DIAGNOSIS RESULTS

With CONSULT.

Check if the “U1000” is detected other than “U1972” in “Self Diagnostic Result” of “AVM”. 

Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to 

AV-181, "AROUND VIEW MONITOR CONTROL UNIT : Diagnosis Procedure"

.

NO

>> GO TO 2.

2.

CHECK SELF-DIAGNOSIS RESULTS

With CONSULT.

Check if any DTC is detected in “Self Diagnostic Result” of “EPS/DAST3”.

Is any DTC detected?

YES

>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to

STC-21, "DTC Index"

.

NO

>> Replace the around view monitor control unit. Refer to 

AV-268, "Removal and Installation"

. 

DTC

Trouble diagnosis

(Trouble diagnosis contents)

Detecting condition

U1972

EPS Message Counter
(Electronically controlled power 
steering message counter)

Around view monitor control unit receives an incorrect signal from EPS control 
unit via CAN communication

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-241

< DTC/CIRCUIT DIAGNOSIS >

[WITH NAVIGATION]

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POWER SUPPLY AND GROUND CIRCUIT

NAVI CONTROL UNIT

NAVI CONTROL UNIT : Diagnosis Procedure

INFOID:0000000010714901

1.

CHECK FUSE

Check for blown fuses.

With stop/start system

Without stop/start system

Is inspection result OK?

YES

>> GO TO 2.

NO

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

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between NAVI control unit harness connector and ground.

Is inspection result OK?

YES

>> INSPECTION END

NO

>> Check harness between NAVI control unit and fuse.

AROUND VIEW MONITOR CONTROL UNIT

AROUND VIEW MONITOR CONTROL UNIT : Diagnosis Procedure

INFOID:0000000010714902

1.

CHECK FUSE

Check for blown fuses. 

With stop/start system

Without stop/start system

Is the inspection result normal?

YES

>> GO TO 2.

Power source

Fuse No.

Battery

#63

Ignition switch ON or START

#56

Power source

Fuse No.

Battery

#16

Ignition switch ON or START

#30

Signal name

Terminal

Ignition 

switch posi-

tion

Standard

Value (Approx.)

(+)

(

−

)

NAVI control unit

Connector

Terminal

Battery power 
supply

M27

19

Ground

OFF

10.8 V – 15.6 V

Battery voltage

Ignition signal

M28

40

ON

10.8 V – 15.6 V

12.0 V

Power source

Fuse No.

Battery

#63

Ignition switch ON or START

#56

Power source

Fuse No.

Battery

#16

Ignition switch ON or START

#30

AV-242

< DTC/CIRCUIT DIAGNOSIS >

[WITH NAVIGATION]

POWER SUPPLY AND GROUND CIRCUIT

NO

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

2.

CHECK AROUND VIEW MONITOR CONTROL UNIT POWER SUPPLY CIRCUIT 

Check voltage between around view monitor control unit harness connector and ground. 

With BSW

Without BSW

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the around view monitor control unit power supply circuit. 

3.

CHECK AROUND VIEW MONITOR CONTROL UNIT GROUND CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect the around view monitor control unit connector. 

3.

Check for continuity between around view monitor control unit harness connector and ground. 

With BSW

Without BSW

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair the around view monitor control unit ground circuit. 

Around view monitor control unit

Condition

Standard 

voltage

Reference voltage

(Approx.)

Connector

Terminal

(+)

(–)

Ignition 

switch

Terminal

M101

2

1

OFF

9.5 - 16 V

Battery voltage

3

ON

Around view monitor control unit

Condition

Standard 

voltage

Reference voltage

(Approx.)

Connector

Terminal

(+)

(–)

Ignition 

switch

Terminal

M24

2

1

OFF

9.5 - 16 V

Battery voltage

4

ON

Around view monitor control unit

Ground

Continuity

Connector

Terminal

M101

1

Existed

Around view monitor control unit

Ground

Continuity

Connector

Terminal

M24

1

Existed

AV

MICROPHONE SIGNAL CIRCUIT

AV-243

< DTC/CIRCUIT DIAGNOSIS >

[WITH NAVIGATION]

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MICROPHONE SIGNAL CIRCUIT

Description

INFOID:0000000010714903

NAVI control unit supplies power to microphone. The microphone transmits the sound voice to the NAVI con-
trol unit.

Diagnosis Procedure

INFOID:0000000010714904

NOTE:
• The auto ACC function allows the accessory power supply for a certain period of time even after ignition

switch OFF. For this reason, when performing diagnosis, turn the ignition switch OFF and wait for 3 minutes
with the driver's door opened.

• The operation of the vehicle during standby may cause an accessory power supply.

1.

CHECK CONTINUITY BETWEEN NAVI CONTROL UNIT AND MICROPHONE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect NAVI control unit harness connector and microphone harness connector.

3.

Check the continuity between NAVI control unit harness connector and microphone harness connector.

4.

Check continuity between NAVI control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK VOLTAGE MICROPHONE VCC 

1.

Connect NAVI control unit harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between NAVI control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace NAVI control unit. Refer to 

AV-262, "Removal and Installation"

.

3.

CHECK MICROPHONE SIGNAL 

1.

Turn ignition switch OFF.

2.

Connect microphone harness connector.

3.

Turn ignition switch ON.

4.

Check the signal between NAVI control unit harness connector.

NAVI control unit

Microphone

Continuity

Connector

Terminal

Connector

Terminal

M28

34

R21

1

Existed

35

4

36

2

NAVI control unit

Ground

Continuity

Connector

Terminal

M28

34

Not existed

35

Terminal

Standard

Voltage

(Approx.)

NAVI control unit

(–)

Connector

Terminal

NAVI control unit

M28

35

Ground

—

5.0 V