Nissan Quest E52. Manual - part 535

EC-350

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1550 BATTERY CURRENT SENSOR

P1550 BATTERY CURRENT SENSOR

DTC Logic

INFOID:0000000009651194

DTC DETECTION LOGIC

NOTE:
If DTC P1550 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to

EC-337, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
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 more than 8 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and wait at least 10 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-350, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009651195

1.

CHECK BATTERY CURRENT SENSOR POWER SUPPLY

1.

Disconnect battery current sensor harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between battery current sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

2.

CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between battery current sensor harness connector and ECM harness connector.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1550

Battery current sensor circuit 
range/performance

The output voltage of the battery current 
sensor remains within the specified 
range while engine is running.

• Harness or connectors

(The sensor circuit is open or shorted.)

• Battery current sensor

Battery current sensor

Ground

Voltage (V)

Connector

Terminal

F76

1

Ground

Approx. 5

Battery current sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F76

3

F8

68

Existed

P1550 BATTERY CURRENT SENSOR

EC-351

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

4.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

3.

CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between battery current sensor harness connector and ECM harness connector.

2.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

4.

CHECK BATTERY CURRENT SENSOR

Check battery current sensor. Refer to 

EC-351, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

NO

>> Replace battery negative cable assembly.

Component Inspection

INFOID:0000000009651196

1.

CHECK BATTERY CURRENT SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect harness connectors disconnected.

3.

Disconnect battery negative cable.

4.

Install jumper cable between battery negative terminal and body
ground.

5.

Turn ignition switch ON.

6.

Check the voltage between ECM harness connector terminals
under the following conditions.

Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to 

PG-97, "How to Handle Battery"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace battery negative cable assembly.

Battery current sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F76

4

F8

66

Existed

ECM

Voltage (V)

Connector

+

–

Terminal

Terminal

F8

66

(Battery current 

sensor signal)

68

(Sensor ground)

Approx. 2.5

JPBIA3287ZZ

EC-352

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1551, P1552 BATTERY CURRENT SENSOR

P1551, P1552 BATTERY CURRENT SENSOR

DTC Logic

INFOID:0000000009651197

DTC DETECTION LOGIC

NOTE:
If DTC P1551 or P1552 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to 

EC-337, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
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 more than 8 V with ignition
switch ON

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 10 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-352, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009651198

1.

CHECK BATTERY CURRENT SENSOR POWER SUPPLY

1.

Disconnect battery current sensor harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between battery current sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

2.

CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between battery current sensor harness connector and ECM harness connector.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1551

Battery current sensor circuit 
low input

An excessively low voltage from the sen-
sor is sent to ECM.

• Harness or connectors

(The sensor circuit is open or shorted.)

• Battery current sensor

P1552

Battery current sensor circuit 
high input

An excessively high voltage from the sen-
sor is sent to ECM.

Battery current sensor

Ground

Voltage (V)

Connector

Terminal

F76

1

Ground

Approx. 5

P1551, P1552 BATTERY CURRENT SENSOR

EC-353

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

4.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

3.

CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between battery current sensor harness connector and ECM harness connector.

2.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

4.

CHECK BATTERY CURRENT SENSOR

Check battery current sensor. Refer to 

EC-351, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

NO

>> Replace battery negative cable assembly.

Component Inspection

INFOID:0000000009651199

1.

CHECK BATTERY CURRENT SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect harness connectors disconnected.

3.

Disconnect battery negative cable.

4.

Install jumper cable between battery negative terminal and body
ground.

5.

Turn ignition switch ON.

6.

Check the voltage between ECM harness connector terminals
under the following conditions.

Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to 

PG-97, "How to Handle Battery"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace battery negative cable assembly.

Battery current sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F76

3

F8

68

Existed

Battery current sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F76

4

F8

66

Existed

ECM

Voltage (V)

Connector

+

–

Terminal

Terminal

F8

66

(Battery current 

sensor signal)

68

(Sensor ground)

Approx. 2.5

JPBIA3287ZZ