Nissan Qashqai J11. Manual - part 292

POWER SUPPLY AND GROUND CIRCUIT

ECM-145

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

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ECM

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POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000010702874

1.

CHECK FUSE

1.

Turn ignition switch OFF.

2.

Check that the following fuse is not fusing.

Is the fuse fusing?

YES

>> Replace the fuse. (Check the power supply if it fuses again.)

NO

>> Go to 2.

2.

CHECK GROUND CONNECTION

Check ground connection E4 and E5. Refer to 

GI-43, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> Go to 3.

NO

>> Repair or replace ground connection.

3.

CHECK ECM GROUND CIRCUIT

1.

Disconnect ECM harness connector.

2.

Check the continuity between ECM harness connector and ground.

3.

Also check harness for short to power.

Is the inspection result normal?

YES

>> Go to 4.

NO

>> Repair or replace malfunctioning part.

4.

CHECK ECM POWER SUPPLY-1

1.

Reconnect ECM harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

Location

Fuse No.

Capacity

IPDM E/R

#52

15 A

#65

5 A

+

Ground

Continuity

ECM

Connector

Terminal

F15

11

Ground

Existed

F16

54

55

56

62

E57

123

125

128

ECM

Voltage

(Approx.)

Connector 

+

−

Terminal

E57

121

128

Battery voltage

ECM-146

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

POWER SUPPLY AND GROUND CIRCUIT

YES

>> Go to 5.

NO

>> Go to 6.

5.

CHECK ECM POWER SUPPLY-2

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> Go to 9.

NO

>> Go to 7.

6.

CHECK ECM POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect IPDM E/R harness connector.

4.

Check the continuity between ECM harness connector and IPDM E/R harness connector.

5.

Also check harness for short to power.

Is the inspection result normal?

YES

>> Perform trouble diagnosis for power supply.

NO

>> Repair or replace malfunctioning part.

7.

CHECK ECM RELAY CONTROL SIGNAL

Check the voltage between ECM harness connector terminals as per the following.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Go to 8.

8.

CHECK ECM RELAY CONTROL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect IPDM E/R harness connector.

4.

Check the continuity between ECM harness connector and IPDM E/R harness connector.

ECM

Condition

Voltage

(Approx.)

Connector 

+

−

Terminal

E57

121

128

Ignition switch ON 

→

 OFF

After turning ignition switch OFF, battery 
voltage will exist for a few seconds and drop 
to approximately 0 V.

+

−

Continuity

ECM

IPDM E/R

Connector Terminal

Connector Terminal

E57

121

F90

103

Existed

ECM

Condition

Voltage

(Approx.)

Connector

+

−

Terminal

E57

121

128

Ignition switch ON

0 V

Turn ignition switch OFF and 
wait at least 10 seconds.

Battery voltage

POWER SUPPLY AND GROUND CIRCUIT

ECM-147

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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ECM

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5.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-67, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning part.

9.

CHECK IGNITION SWITCH SIGNAL

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector terminals.

Is the inspection result normal?

YES

>> Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Go to 10.

10.

CHECK IGNITION SWITCH SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect IPDM E/R harness connector.

4.

Check the continuity between ECM harness connector and IPDM E/R harness connector.

5.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> Perform trouble diagnosis for power supply.

NO

>> Repair or replace malfunctioning part.

+

−

Continuity

ECM

IPDM E/R

Connector Terminal

Connector Terminal

E57

121

F90

103

Existed

ECM

Condition

Voltage

(Approx.)

Connector

+

−

Terminal

E57

109

128

Ignition switch OFF

0 V

Ignition switch ON

Battery voltage

+

−

Continuity

ECM

IPDM E/R

Connector

Terminal

Connector

Terminal

E57

109

E38

19

Existed

ECM-148

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

U0101 CAN COMM CIRCUIT

U0101 CAN COMM CIRCUIT

DTC Description

INFOID:0000000010702875

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. 
Each control unit transmits/receives data but selectively reads required data only.

DTC DETECTION LOGIC

POSSIBLE CAUSE

Harness or connectors (CAN communication line is open or shorted)

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 3 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

ECM-148, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010702876

Perform the trouble diagnosis for CAN communication system. Refer to 

LAN-24, "Trouble Diagnosis Flow

Chart"

.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

U0101

LOST COMM (TCM)
(Lost communication with TCM)

When ECM is not transmitting or receiving CAN communication signal of 
OBD (emission-related diagnosis) for 2 seconds or more.