2007 INFINITI M35 Factory Service Manual

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Page 2769 of 4647

INFINITI M35 2007 Factory Service Manual EC-1240
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DTC P1550 BATTERY CURRENT SENSOR
Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM gr

Page 2770 of 4647

INFINITI M35 2007 Factory Service Manual DTC P1550 BATTERY CURRENT SENSOR
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2. CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT
1. Disconnect battery current sensor (

Page 2771 of 4647

INFINITI M35 2007 Factory Service Manual EC-1242
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DTC P1550 BATTERY CURRENT SENSOR
Revision: 2007 April2007 M35/M45
6. CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between battery c

Page 2772 of 4647

INFINITI M35 2007 Factory Service Manual DTC P1550 BATTERY CURRENT SENSOR
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5. Check voltage between ECM terminal 71 (battery current sensor
signal) and ground.
6. If

Page 2773 of 4647

INFINITI M35 2007 Factory Service Manual EC-1244
[VK45DE]
DTC P1551, P1552 BATTERY CURRENT SENSOR
Revision: 2007 April2007 M35/M45
DTC P1551, P1552 BATTERY CURRENT SENSORPFP:294G0
Component DescriptionNBS005LM
The power generation voltage va

EC-1244
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DTC P1551, P1552 BATTERY CURRENT SENSOR
Revision: 2007 April2007 M35/M45
DTC P1551, P1552 BATTERY CURRENT SENSORPFP:294G0
Component DescriptionNBS005LM
The power generation voltage variable control enables fuel con-
sumption to be decreased by reducing the engine load which is
caused by the power generation of the generator. The battery cur-
rent sensor (1) is installed to the battery cable at the negative termi-
nal. The sensor measures the charging/discharging current of the
battery. Based on the sensor signal, ECM judges whether or not the
power generation voltage variable control is performed. When per-
forming the power generation voltage variable control, ECM calcu-
lates the target power generation voltage based on the sensor
signal. And ECM sends the calculated value as the power genera-
tion command value to IPDM E/R. For the details of the power gen-
eration voltage variable control, refer to SC section.
CAUTION:
Do not 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 the battery
discharge may occur.
CONSULT-II Reference Value in Data Monitor ModeNBS005LN
Specification data are reference values.
*: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to SC-5, "SPECIFIC GRAVITY CHECK" .
On Board Diagnosis LogicNBS005LO
The MIL will not light up for thes diagnoses.
NOTE:
If DTC P1551 or P1552 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-1193, "
DTC P0643 SENSOR POWER SUPPLY" .
PBIB2685E
MONITOR ITEM CONDITION SPECIFICATION
BAT CUR SEN
Engine speed: Idle
Battery: Fully charged*
Selector lever: P or N
Air conditioner switch: OFF
No loadApprox. 2,600 - 3,500mV
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1551
1551Battery current sensor circuit
low inputAn excessively low voltage from the sensor
is sent to ECM.
Harness or connectors
(The sensor circuit is open or shorted.)
Battery current sensor P1552
1552Battery current sensor circuit
high inputAn excessively high voltage from the sensor
is sent to ECM.

Page 2774 of 4647

INFINITI M35 2007 Factory Service Manual DTC P1551, P1552 BATTERY CURRENT SENSOR
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DTC Confirmation ProcedureNBS005LP
If DTC Confirmation Procedure has been previously

Page 2775 of 4647

INFINITI M35 2007 Factory Service Manual EC-1246
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DTC P1551, P1552 BATTERY CURRENT SENSOR
Revision: 2007 April2007 M35/M45
Wiring DiagramNBS005LQ
TBWT1064E

Page 2776 of 4647

INFINITI M35 2007 Factory Service Manual DTC P1551, P1552 BATTERY CURRENT SENSOR
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Specification data are reference values and are measured between each terminal and g

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