Infiniti M35/M45 Y50. Manual - part 519

DTC P1554 BATTERY CURRENT SENSOR

EC-549

[VQ35DE]

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2. 

CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect battery current sensor harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between battery current sensor terminal 1 and
ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

3. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E11, F2

●

Harness for open or short between battery current sensor and ECM

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

4. 

CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between battery current sensor terminal 2 and ECM terminal 67.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

5. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E10, F1

●

Harness for open or short between battery current sensor and ECM

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

PBIB2685E

Voltage: Approximately 5V

PBIA9891J

Continuity should exist.

EC-550

[VQ35DE]

DTC P1554 BATTERY CURRENT SENSOR

6. 

CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between battery current sensor terminal 3 and ECM terminal 71.
Refer to Wiring Diagram.

2.

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

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E10, F1

●

Harness for open or short between battery current sensor and ECM

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

8. 

CHECK BATTERY CURRENT SENSOR

Refer to 

EC-550, "Component Inspection"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Replace battery negative cable assembly.

9. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-153, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

NBS0054I

BATTERY CURRENT SENSOR

1.

Reconnect harness connectors disconnected.

2.

Disconnect battery negative cable (1).

●

: To body ground

3.

Install jumper cable (A) between battery negative terminal and
body ground.

4.

Turn ignition switch ON.

Continuity should exist.

PBIB2724E

DTC P1554 BATTERY CURRENT SENSOR

EC-551

[VQ35DE]

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5.

Check voltage between ECM terminal 71 (battery current sensor
signal) and ground.

6.

If NG, replace battery negative cable assembly.

Voltage: Approximately 2.5V

PBIB2617E

EC-552

[VQ35DE]

DTC P1564 ICC STEERING SWITCH

DTC P1564 ICC STEERING SWITCH

PFP:25551

Component Description

NBS0054J

ICC steering switch has variant values of electrical resistance for each button. ECM reads voltage variation of
switch, and determines which button is operated.

Refer to 

ACS-6, "DESCRIPTION"

  for the ICC function.

CONSULT-II Reference Value in Data Monitor Mode

NBS0054K

Specification data are reference values.

On Board Diagnosis Logic

NBS0054L

This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.

NOTE:
If DTC P1564 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to

EC-483, "DTC P0605 ECM"

 .

1.

ICC steering switch

2.

RESUME/ACCELERATE switch

3.

SET/COAST switch

4.

CANCEL switch

5.

DISTANCE switch

6.

MAIN switch

PBIB2709E

MONITOR ITEM

CONDITION

SPECIFICATION

MAIN SW

●

Ignition switch: ON

MAIN switch: Pressed

ON

MAIN switch: Released

OFF

CANCEL SW

●

Ignition switch: ON

CANCEL switch: Pressed

ON

CANCEL switch: Released

OFF

RESUME/ACC SW

●

Ignition switch: ON

RESUME/ACCELERATE switch: 
Pressed

ON

RESUME/ACCELERATE switch: 
Released

OFF

SET SW

●

Ignition switch: ON

SET/COAST switch: Pressed

ON

SET/COAST switch: Released

OFF

DIST SW

●

Ignition switch: ON

DISTANCE switch: Pressed

ON

DISTANCE switch: Released

OFF

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P1564
1564

ICC steering switch

●

An excessively high voltage signal from the 
ICC steering switch is sent to ECM.

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ECM detects that input signal from the ICC 
steering switch is out of the specified range.

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ECM detects that the ICC steering switch is 
stuck ON.

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Harness or connectors
(The switch circuit is open or shorted.)

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ICC steering switch

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ECM