Nissan Sentra. Instruction — part 421
EC-380
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
P1553 BATTERY CURRENT SENSOR
P1553 BATTERY CURRENT SENSOR
DTC Logic
INFOID:0000000009758633
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and wait at least 10 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009758634
1.
CHECK BATTERY CURRENT SENSOR POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect battery current sensor harness connector.
3. Turn ignition switch ON.
4. Check the voltage between battery current sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Check sensor power supply 2 circuit. Refer to
.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1553
BAT CURRENT SENSOR
(Battery current sensor)
The signal voltage transmitted from the
sensor to ECM is higher than the amount
of the maximum power generation.
• Harness or connectors
(Battery current sensor circuit is open
or shorted.)
• Battery current sensor
• Camshaft position sensor
• Camshaft (Intake)
• Starter motor
• Starting system circuit
• Dead (Weak) battery
• Sensor power supply 1 circuit
+
−
Voltage
(Approx.)
Battery current sensor
Connector
Terminal
F54
1
Ground
5.0 V
P1553 BATTERY CURRENT SENSOR
EC-381
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace error-detected parts.
3.
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 power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
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 to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts
5.
CHECK BATTERY CURRENT SENSOR
Check the battery current sensor. Refer to
EC-381, "Component Inspection (Battery Current Sensor)"
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-39, "Intermittent Incident"
.
NO
>> Replace battery current sensor. Refer to
PG-53, "Removal and Installation"
Component Inspection (Battery Current Sensor)
INFOID:0000000009758635
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.
+
−
Continuity
Battery current sensor
ECM
Connector
Terminal
Connector
Terminal
F54
3
F25
62
Existed
+
−
Continuity
Battery current sensor
ECM
Connector
Terminal
Connector
Terminal
F54
4
F25
63
Existed
JPBIA3286ZZ
EC-382
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
P1553 BATTERY CURRENT SENSOR
5. Turn ignition switch ON.
6. Check the voltage between ECM harness connector terminals.
Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace battery current sensor. Refer to
PG-53, "Removal and Installation"
.
ECM
Voltage
(Approx.)
Connector
+
-
Terminal
F25
63
62
2.5 V
P1554 BATTERY CURRENT SENSOR
EC-383
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P1554 BATTERY CURRENT SENSOR
DTC Logic
INFOID:0000000009758636
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to
EC-383, "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:0000000009758637
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 of “ENGINE” using CONSULT.
3. Check “BAT CUR SEN” indication for 10 seconds.
Without CONSULT
1. Start engine and let it idle.
2. Check the voltage between ECM harness connectors.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1554
BAT CURRENT SENSOR
(Battery current sensor)
The output voltage of the battery current
sensor is lower than the specified value
while the battery voltage is high enough.
• Harness or connectors
(Battery current sensor circuit is open
or shorted.)
• Battery current sensor
• Camshaft position sensor
• Camshaft (Intake)
• Starter motor
• Starting system circuit
• Dead (Weak) battery
• Sensor power supply 1 circuit
“BAT CUR SEN”
: above 2,300 mv at least
once
ECM
Voltage
Connector
+
−
Terminal
F25
63
62
Above 2.3 V at
least once
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