Infiniti QX56 (Z62). Manual — part 609
EC-414
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P1550 BATTERY CURRENT SENSOR
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-414, "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
Component Inspection (Battery Current Sensor)
INFOID:0000000006217921
1.
CHECK BATTERY CURRENT SENSOR
1.
Turn ignition switch OFF.
2.
Reconnect harness connectors disconnected.
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
P1550 BATTERY CURRENT SENSOR
EC-415
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
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-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-416
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P1551, P1552 BATTERY CURRENT SENSOR
P1551, P1552 BATTERY CURRENT SENSOR
DTC Logic
INFOID:0000000006217922
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
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 8 V or more with ignition
switch ON
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON and wait at least 10 seconds.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006217923
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
DTC No.
Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1551
BAT CURRENT SENSOR
(Battery current sensor circuit
low input)
An excessively low voltage from
the sensor is sent to ECM.
• 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
shorted.)
• Battery current sensor
• Accelerator pedal position sensor
• Camshaft position sensor (bank 1)
• Crankshaft position sensor
• Refrigerant pressure sensor
• EVAP control system pressure sensor
P1552
Battery current sensor circuit
high input
(BAT CURRENT SENSOR)
An excessively high voltage from
the sensor is sent to ECM.
Battery current sensor
Ground
Voltage (V)
Connector
Terminal
E63
2
Ground
Approx. 5
P1551, P1552 BATTERY CURRENT SENSOR
EC-417
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair short to ground or short to power in harness or connectors.
5.
CHECK COMPONENTS
Check the following.
• Crankshaft position sensor (Refer to
EC-301, "Component Inspection (Crankshaft Position Sensor)"
.)
• Camshaft position sensor (bank 1) (Refer to
EC-306, "Component Inspection (Camshaft Position Sensor)"
• EVAP control system pressure sensor (Refer to
EC-520, "Component Function Check"
• Refrigerant pressure sensor (Refer to
EC-520, "Component Function Check"
.)
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace malfunctioning component.
6.
CHECK APP SENSOR
EC-470, "Component Inspection (Accelerator Pedal Position Sensor)"
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> GO TO 7.
7.
REPLACE ACCELERATOR PEDAL ASSEMBLY
Replace accelerator pedal assembly. Refer to
ACC-3, "MODELS WITHOUT DISTANCE CONTROL ASSIST
SYSTEM : Removal and Installation"
(Without distance control assist system) or
DISTANCE CONTROL ASSIST SYSTEM : Removal and Installation"
(With distance control assist system).
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
E80
133
EVAP control system pressure sen-
sor
C17
3
Refrigerant pressure sensor
E77
1
131
APP sensor 2 (Without ICC)
E110
1
APP sensor 2 (with ICC)
E67
9
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