Infiniti QX56 (Z62). Manual — part 611
EC-422
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P1553 BATTERY CURRENT SENSOR
>> INSPECTION END
8.
CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
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 10.
NO
>> GO TO 9.
9.
DETECT MALFUNCTIONING PART
Check the following.
• Harness for open or short between battery current sensor and ECM
• Loose or poor connection for each connector and harness
>> Repair open circuit, short to ground or short to power in harness or connectors.
10.
CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
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 12.
NO
>> GO TO 11.
11.
DETECT MALFUNCTIONING PART
Check the following.
• Harness for open or short between battery current sensor and ECM
• Loose or poor connection for each connector and harness
>> Repair open circuit, short to ground or short to power in harness or connectors.
12.
CHECK BATTERY CURRENT SENSOR
EC-427, "Component Inspection (Battery Current Sensor)"
.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Replace battery negative cable assembly.
13.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
>> INSPECTION END
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E63
4
E80
150
Existed
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E63
3
E80
138
Existed
P1553 BATTERY CURRENT SENSOR
EC-423
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Component Inspection (Battery Current Sensor)
INFOID:0000000006217927
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-159, "How to Handle Battery"
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace battery negative cable assembly.
: To body ground
ECM
Voltage (V)
Connector
+
–
Terminal
Terminal
E80
138
(Battery current sensor signal)
150
Approx. 2.5
JPBIA3287ZZ
EC-424
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P1554 BATTERY CURRENT SENSOR
P1554 BATTERY CURRENT SENSOR
DTC Logic
INFOID:0000000006217928
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM COMPONENT FUNCTION CHECK
Perform Component Function Check. Refer to
EC-424, "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
>> Go to
Component Function Check
INFOID:0000000006217929
1.
PRECONDITIONING
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is 12.8 V or more 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-III
1.
Start engine and let it idle.
2.
Select “BAT CUR SEN” in “DATA MONITOR” mode with CONSULT-III.
3.
Check “BAT CUR SEN” indication for 10 seconds.
“BAT CUR SEN” should be above 2,300 mV at least once.
WITHOUT CONSULT-III
1.
Start engine and let it idle.
2.
Check the voltage between ECM harness connector terminals as per the following.
DTC No.
Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1554
BAT CURRENT SENSOR
(Battery current sensor per-
formance)
The output voltage of the bat-
tery 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.)
(Accelerator pedal position sensor 2 circuit is shorted.)
[Camshaft position sensor (bank 1) circuit is shorted.]
(Crankshaft position sensor circuit is shorted.)
(Refrigerant pressure sensor circuit is shorted.)
(EVAP control system pressure sensor circuit is short-
ed.)
• Battery current sensor
• Accelerator pedal position sensor
• Camshaft position sensor (bank 1)
• Crankshaft position sensor
• Refrigerant pressure sensor
• EVAP control system pressure sensor
P1554 BATTERY CURRENT SENSOR
EC-425
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000006217930
1.
CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT-I
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 8.
NO
>> GO TO 2.
2.
CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT-II
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between battery current sensor harness connector and ECM harness connector.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
• Harness for open between battery current sensor and ECM
• Loose or poor connection for each connector and harness
>> Repair open circuit.
4.
CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
ECM
Voltage (V)
Connector
+
–
Terminal
Terminal
E80
138
(Battery current sensor signal)
150
Approx. 2.5
Battery current sensor
Ground
Voltage (V)
Connector
Terminal
E63
2
Ground
Approx. 5
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E63
2
E80
133
Existed
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
F110
76
Crankshaft position sensor
F74
1
77
Camshaft position sensor (bank 1)
F84
1
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