Infiniti QX56 (Z62). Manual - part 612

 

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Infiniti QX56 (Z62). Manual - part 612

 

 

EC-426

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P1554 BATTERY CURRENT SENSOR

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair short to ground or short to power in harness or connectors.

5.

CHECK COMPONENTS

Check the following.
• Crankshaft position sensor (Refer to 

EC-301, "Component Inspection (Crankshaft Position Sensor)"

.)

• Camshaft position sensor (bank 1) (Refer to 

EC-306, "Component Inspection (Camshaft Position Sensor)"

.)

• EVAP control system pressure sensor (Refer to 

EC-520, "Component Function Check"

.)

• Refrigerant pressure sensor (Refer to 

EC-520, "Component Function Check"

.)

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace malfunctioning component.

6.

CHECK APP SENSOR

Refer to 

EC-470, "Component Inspection (Accelerator Pedal Position Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> GO TO 7.

7.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly. Refer to 

ACC-3, "MODELS WITHOUT DISTANCE CONTROL ASSIST

SYSTEM : Removal and Installation"

 (Without distance control assist system) or 

ACC-4, "MODELS WITH

DISTANCE CONTROL ASSIST SYSTEM : Removal and Installation"

 (With distance control assist system).

>> INSPECTION END

8.

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 10.

NO

>> GO TO 9.

9.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open or short between battery current sensor and ECM
• Loose or poor connection for each connector and harness

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

10.

CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

E80

133

EVAP control system pressure sen-
sor

C17

3

Refrigerant pressure sensor

E77

1

131

APP sensor 2 (Without ICC)

E110

1

APP sensor 2 (with ICC)

E67

9

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

Battery current sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E63

4

E80

150

Existed

P1554 BATTERY CURRENT SENSOR

EC-427

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

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F

G

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EC

N

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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 12.

NO

>> GO TO 11.

11.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open or short between battery current sensor and ECM
• Loose or poor connection for each connector and harness

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

12.

CHECK BATTERY CURRENT SENSOR

Refer to 

EC-427, "Component Inspection (Battery Current Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Replace battery negative cable assembly.

13.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (Battery Current Sensor)

INFOID:0000000006217931

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-159, "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

E63

3

E80

138

Existed

: To body ground

ECM

Voltage (V)

Connector

+

Terminal

Terminal

E80

138

(Battery current sensor signal)

150

Approx. 2.5

JPBIA3287ZZ

EC-428

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P1556, P1557 BATTERY TEMPERATURE SENSOR

P1556, P1557 BATTERY TEMPERATURE SENSOR

DTC Logic

INFOID:0000000006217932

DTC DETECTION LOGIC

NOTE:
If DTC P1556 or P1557 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to 

EC-381, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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 10 V or more at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine and let it idle at least 10 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-428, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217933

1.

CHECK  BATTERY TEMPERATURE SENSOR INPUT SIGNAL CIRCUIT-I

1.

Disconnect battery current sensor harness connector.

2.

Turn ignition switch ON.

3.

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

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 2.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1556

BAT TMP SEN/CIRC
(Battery temperature sensor 
circuit low input)

Signal voltage from Battery 
temperature sensor remains 
0.16V or less for 5 seconds 
or more.

• Harness or connectors

[Battery current sensor (Battery temperature sensor) 
circuit is shorted.]
(Crankshaft position sensor circuit is open or shorted.)
[Camshaft position sensor (bank 1) circuit is shorted.]
(Accelerator pedal position sensor 2 circuit is shorted.)
(Refrigerant pressure sensor circuit is shorted.)
(EVAP control system pressure sensor circuit is short-
ed.)

• Battery current sensor (Battery temperature sensor)
• Crankshaft position sensor
• Camshaft position sensor (bank 1)
• Accelerator pedal position sensor 2
• Refrigerant pressure sensor
• EVAP control system pressure sensor

P1557

BAT TMP SEN/CIRC
(Battery temperature sensor 
circuit high input)

Signal voltage from Battery 
temperature sensor remains 
4.84V or more for 5 seconds 
or more.

Battery current sensor

Ground

Voltage (V)

Connector

Terminal

E63

1

Ground

Approx. 5

P1556, P1557 BATTERY TEMPERATURE SENSOR

EC-429

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

E

F

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EC

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2.

CHECK BATTERY TEMPERATURE SENSOR INPUT SIGNAL CIRCUIT-II

1.

Turn ignition switch ON.

2.

Disconnect ECM harness connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit.

3.

CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair short to ground or short to power in harness or connectors.

4.

CHECK COMPONENTS

Check the following.
• Camshaft position sensor (bank 1) (Refer to 

EC-306, "Component Inspection (Camshaft Position Sensor)"

.)

• CKP sensor (Refer to 

EC-301, "Component Inspection (Crankshaft Position Sensor)"

.)

• Battery current sensor sensor (Refer to 

EC-423, "Component Inspection (Battery Current Sensor)"

.)

• Refrigerant pressure sensor (Refer to 

EC-520, "Diagnosis Procedure"

.)

• EVAP control system pressure sensor (Refer to 

EC-335, "Component Inspection (EVAP Control System

Pressure Sensor)"

.)

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace malfunctioning component.

5.

CHECK APP SENSOR

Refer to 

EC-470, "Component Inspection (Accelerator Pedal Position Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 6.

6.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly.

>> INSPECTION END

7.

CHECK BATTERY  TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

Battery current sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E63

1

E80

139

Existed

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

F110

76

Crankshaft position sensor

F74

1

77

Camshaft position sensor (bank 1)

F84

1

E80

133

Battery current sensor

E63

2

Refrigerant pressure sensor

E77

1

EVAP control system pressure sen-
sor

C17

3

131

APP sensor 2 (Without ICC)

E110

1

APP sensor 2 (with ICC)

E67

9

 

 

 

 

 

 

 

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