2006 INFINITI M35 Factory Service Manual

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Page 2089 of 5621

INFINITI M35 2006 Factory Service Manual EC-546
[VQ35DE]
DTC P1551, P1552 BATTERY CURRENT SENSOR
Revision: 2006 January2006 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not us

Page 2090 of 5621

INFINITI M35 2006 Factory Service Manual DTC P1551, P1552 BATTERY CURRENT SENSOR
EC-547
[VQ35DE]
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Revision: 2006 January2006 M35/M45
2. CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT
1. Disconnect battery current

Page 2091 of 5621

INFINITI M35 2006 Factory Service Manual EC-548
[VQ35DE]
DTC P1551, P1552 BATTERY CURRENT SENSOR
Revision: 2006 January2006 M35/M45
6. CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between b

Page 2092 of 5621

INFINITI M35 2006 Factory Service Manual DTC P1553 BATTERY CURRENT SENSOR
EC-549
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Revision: 2006 January2006 M35/M45
DTC P1553 BATTERY CURRENT SENSORPFP:294G0
Component DescriptionNBS00545
The power genera

DTC P1553 BATTERY CURRENT SENSOR
EC-549
[VQ35DE]
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Revision: 2006 January2006 M35/M45
DTC P1553 BATTERY CURRENT SENSORPFP:294G0
Component DescriptionNBS00545
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 ModeNBS00546
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 LogicNBS00547
The MIL will not light up for this diagnosis.
NOTE:
If DTC P1553 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
EC-499, "
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
P1553
1553Battery current sensor perfor-
manceThe 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

Page 2093 of 5621

INFINITI M35 2006 Factory Service Manual EC-550
[VQ35DE]
DTC P1553 BATTERY CURRENT SENSOR
Revision: 2006 January2006 M35/M45
DTC Confirmation ProcedureNBS00548
If DTC Confirmation Procedure has been previously conducted, always turn

Page 2094 of 5621

INFINITI M35 2006 Factory Service Manual DTC P1553 BATTERY CURRENT SENSOR
EC-551
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Revision: 2006 January2006 M35/M45
Wiring DiagramNBS00549
TBWT0995E

Page 2095 of 5621

INFINITI M35 2006 Factory Service Manual EC-552
[VQ35DE]
DTC P1553 BATTERY CURRENT SENSOR
Revision: 2006 January2006 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM g

Page 2096 of 5621

INFINITI M35 2006 Factory Service Manual DTC P1553 BATTERY CURRENT SENSOR
EC-553
[VQ35DE]
C
D
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K
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MA
EC
Revision: 2006 January2006 M35/M45
2. CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT
1. Disconnect battery current sensor

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