Nissan Murano Z51. Manual — part 589

EC-364

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1551, P1552 BATTERY CURRENT SENSOR

3.

Disconnect battery negative cable (1).

4.

Install jumper cable (A) 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-3, "How to Handle Battery"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace battery negative cable assembly.

: Vehicle front

: To body ground

ECM

Voltage (V)

Connector

+

–

Terminal

Terminal

F8

42

(Battery current

sensor signal)

44

(Sensor ground)

Approx. 2.5

ALBIA0076ZZ

P1553 BATTERY CURRENT SENSOR

EC-365

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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P1553 BATTERY CURRENT SENSOR

Description

INFOID:0000000005536770

The power generation voltage variable control enables fuel consumption to be decreased by reducing the
engine load which is caused by the power generation of the generator. The battery current sensor is installed
to the battery cable at the negative terminal. The sensor measures the charging/discharging current of the bat-
tery. Based on the sensor signal, ECM judges whether or not the power generation voltage variable control is
performed. When performing the power generation voltage variable control, ECM calculates the target power
generation voltage based on the sensor signal. And ECM sends the calculated value as the power generation
command value to IPDM E/R. For the details of the power generation voltage variable control, refer to

CHG-8,

"System Description"

.

CAUTION:

Never connect the electrical component or the ground wire directly to the battery terminal. The con-
nection causes the malfunction of the power generation voltage variable control, and then battery dis-
charge may occur.

DTC Logic

INFOID:0000000005536771

DTC DETECTION LOGIC

NOTE:
If DTC P1553 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to

EC-343, "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

>> Go to

EC-365, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005536772

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E38. Refer to Ground Inspection in

GI-42, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1553

Battery current sensor perfor-
mance

The signal voltage transmitted from the
sensor to ECM is higher than the amount
of the maximum power generation.

• Harness or connectors

(The sensor circuit is open or shorted.)

• Battery current sensor

EC-366

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P1553 BATTERY CURRENT SENSOR

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 3.

NO

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

3.

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.

4.

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 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 5.

NO

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

5.

CHECK BATTERY CURRENT SENSOR

Refer to

EC-360, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace battery negative cable assembly.

6.

CHECK INTERMITTENT INCIDENT

Refer to

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005536773

1.

CHECK BATTERY CURRENT SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect harness connectors disconnected.

Battery current sensor

Ground

Voltage (V)

Connector

Terminal

F76

1

Ground

Approx. 5

Battery current sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F76

2

F8

44

Existed

Battery current sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F76

3

F8

42

Existed

P1553 BATTERY CURRENT SENSOR

EC-367

< DTC/CIRCUIT DIAGNOSIS >

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3.

Disconnect battery negative cable (1).

4.

Install jumper cable (A) 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-3, "How to Handle Battery"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace battery negative cable assembly.

: Vehicle front

: To body ground

ECM

Voltage (V)

Connector

+

–

Terminal

Terminal

F8

42

(Battery current

sensor signal)

44

(Sensor ground)

Approx. 2.5

ALBIA0076ZZ