Nissan Pathfinder. Manual — part 516
EC-370
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P1553 BATTERY CURRENT SENSOR
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT
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 4.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK BATTERY CURRENT SENSOR
Check battery current sensor. Refer to
EC-373, "Component Inspection"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
NO
>> Replace battery negative cable assembly.
Component Inspection
INFOID:0000000009178287
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-86, "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
F34
3
F52
68
Existed
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F34
4
F52
66
Existed
ECM
Voltage (V)
Connector
+
–
Terminal
Terminal
F52
66
68
Approx. 2.5
JPBIA3287ZZ
P1554 BATTERY CURRENT SENSOR
EC-371
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P1554 BATTERY CURRENT SENSOR
DTC Logic
INFOID:0000000009178288
DTC DETECTION LOGIC
NOTE:
If DTC P1554 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
DTC CONFIRMATION PROCEDURE
1.
PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to
EC-372, "Component Function Check"
.
NOTE:
Use component function check to check the overall function of the battery current sensor circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Component Function Check
INFOID:0000000009178289
1.
PRECONDITIONING
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is more than 12.8 V at idle.
• Before performing the following procedure, confirm that all load switches and A/C switch are turned
OFF.
>> GO TO 2.
2.
PERFORM COMPONENT FUNCTION CHECK
With CONSULT
1. Start engine and let it idle.
2. Select “BAT CUR SEN” in “DATA MONITOR” mode with CONSULT.
3. Check “BAT CUR SEN” indication for 10 seconds.
“BAT CUR SEN” should be above 2,300mV at least once.
Without CONSULT
1. Start engine and let it idle.
2. Check voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1554
BAT CURRENT SENSOR
(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
ECM
Voltage (V)
Connector
+
–
Terminal
F52
66
68
Above 2.3 at least once
EC-372
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P1554 BATTERY CURRENT SENSOR
Diagnosis Procedure
INFOID:0000000009178290
1.
CHECK BATTERY CURRENT SENSOR POWER SUPPLY
1. Disconnect battery current sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between battery current sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
2.
CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT
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 3.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT
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 4.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK BATTERY CURRENT SENSOR
Check battery current sensor. Refer to
EC-373, "Component Inspection"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
NO
>> Replace battery negative cable assembly.
Component Inspection
INFOID:0000000009178291
1.
CHECK BATTERY CURRENT SENSOR
1. Turn ignition switch OFF.
2. Reconnect harness connectors disconnected.
Battery current sensor
Ground
Voltage (V)
Connector
Terminal
F34
1
Ground
Approx. 5
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F34
3
F52
68
Existed
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F34
4
F52
66
Existed
P1554 BATTERY CURRENT SENSOR
EC-373
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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-86, "How to Handle Battery"
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace battery negative cable assembly.
ECM
Voltage (V)
Connector
+
–
Terminal
Terminal
F52
66
68
Approx. 2.5
JPBIA3287ZZ
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