Nissan Pathfinder (2005 year). Instruction — part 217
DTC P1553 BATTERY CURRENT SENSOR
EC-587
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2005 Pathfinder
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 E5, F14
●
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.
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 E5, F14
●
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.
BBIA0582E
Voltage: Approximately 5V
PBIB2609E
Continuity should exist.
EC-588
DTC P1553 BATTERY CURRENT SENSOR
2005 Pathfinder
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.
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 E5, F14
●
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-588, "Component Inspection"
.
OK or NG
OK
>> GO TO 9.
NG
>> Replace battery negative cable assembly.
9.
CHECK INTERMITTENT INCIDENT
Refer to
EC-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
UBS00KTX
BATTERY CURRENT SENSOR
1.
Reconnect harness connectors disconnected.
2.
Disconnect battery negative cable.
3.
Install jumper cable between battery negative terminal and body
ground.
4.
Turn ignition switch ON.
Continuity should exist.
BBIA0588E
DTC P1553 BATTERY CURRENT SENSOR
EC-589
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2005 Pathfinder
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-590
DTC P1554 BATTERY CURRENT SENSOR
2005 Pathfinder
DTC P1554 BATTERY CURRENT SENSOR
PFP:294G0
Component Description
UBS00KTY
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 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 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 Mode
UBS00KTZ
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 Logic
UBS00KU0
The MIL will not light up for this diagnosis.
NOTE:
If DTC P1554 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229. Refer to
EC-478, "DTC P1229 SENSOR POWER SUPPLY"
.
Overall Function Check
UBS00KU1
Use this procedure to check the overall function of the battery current sensor circuit. During this check, a 1st
trip DTC might not be confirmed.
TESTING CONDITION:
●
Before performing the following procedure, confirm that battery voltage is more than 12.8V at idle.
●
Before performing the following procedure, confirm that all load switches and A/C switch are
turned OFF.
WITH CONSULT-II
1.
Start engine and let it idle.
BBIA0582E
MONITOR ITEM
CONDITION
SPECIFICATION
BAT CUR SEN
●
Battery: Fully charged*
●
Shift lever: P or N
●
Air conditioner switch: OFF
●
No-load
Idle
Approx. 2,600 - 3,500mV
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1554
1554
Battery current sensor perfor-
mance
The output voltage of the battery current
sensor is lower than the specified value
while the battery voltage is high enough.
●
Harness or connectors
(The sensor circuit is open or shorted.)
●
Battery current sensor
DTC P1554 BATTERY CURRENT SENSOR
EC-591
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2005 Pathfinder
2.
Select “BAT CUR SEN” in “DATA MONITOR” mode with CON-
SULT-II.
3.
Check “BAT CUR SEN” indication for 10 seconds.
“BAT CUR SEN” should be above 2,300mV at least once.
4.
If NG, go to
EC-593, "Diagnostic Procedure"
.
WITH GST
1.
Start engine and let it idle.
2.
Check voltage between ECM terminal 71 (battery current sensor
signal) and ground for 10 seconds.
The voltage should be above 2.3V at least once.
3.
If NG, go to
EC-593, "Diagnostic Procedure"
.
PBIB2615E
PBIB2616E
EC-592
DTC P1554 BATTERY CURRENT SENSOR
2005 Pathfinder
Wiring Diagram
UBS00LIM
BBWA1783E
DTC P1554 BATTERY CURRENT SENSOR
EC-593
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2005 Pathfinder
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
*: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to
SC-5, "SPECIFIC GRAVITY CHECK"
.
Diagnostic Procedure
UBS00KU3
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten three ground screws on the body.
Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
49
P
Sensor power supply
(Refrigerant pressure sen-
sor/Battery current sensor)
[Ignition switch: ON]
Approximately 5V
67
B
Sensor ground
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
71
R
Battery current sensor
[Engine is running]
●
Battery: Fully charged*
●
Idle speed
Approximately 2.6 - 3.5 V
BBIA0539E
EC-594
DTC P1554 BATTERY CURRENT SENSOR
2005 Pathfinder
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 E5, F14
●
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.
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 E5, F14
●
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.
BBIA0582E
Voltage: Approximately 5V
PBIB2609E
Continuity should exist.
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