Infiniti QX56 (Z62). Manual — part 612
EC-426
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P1554 BATTERY CURRENT SENSOR
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).
>> 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
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
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E63
4
E80
150
Existed
P1554 BATTERY CURRENT SENSOR
EC-427
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
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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
Component Inspection (Battery Current Sensor)
INFOID:0000000006217931
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.
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E63
3
E80
138
Existed
: To body ground
ECM
Voltage (V)
Connector
+
–
Terminal
Terminal
E80
138
(Battery current sensor signal)
150
Approx. 2.5
JPBIA3287ZZ
EC-428
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P1556, P1557 BATTERY TEMPERATURE SENSOR
P1556, P1557 BATTERY TEMPERATURE SENSOR
DTC Logic
INFOID:0000000006217932
DTC DETECTION LOGIC
NOTE:
If DTC P1556 or P1557 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to
.
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 10 V or more at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine and let it idle at least 10 seconds.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006217933
1.
CHECK BATTERY TEMPERATURE SENSOR INPUT SIGNAL CIRCUIT-I
1.
Disconnect battery current sensor harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between battery current sensor hrness connector and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 2.
DTC No.
Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1556
BAT TMP SEN/CIRC
(Battery temperature sensor
circuit low input)
Signal voltage from Battery
temperature sensor remains
0.16V or less for 5 seconds
or more.
• Harness or connectors
[Battery current sensor (Battery temperature sensor)
circuit is shorted.]
(Crankshaft position sensor circuit is open or shorted.)
[Camshaft position sensor (bank 1) circuit is shorted.]
(Accelerator pedal position sensor 2 circuit is shorted.)
(Refrigerant pressure sensor circuit is shorted.)
(EVAP control system pressure sensor circuit is short-
ed.)
• Battery current sensor (Battery temperature sensor)
• Crankshaft position sensor
• Camshaft position sensor (bank 1)
• Accelerator pedal position sensor 2
• Refrigerant pressure sensor
• EVAP control system pressure sensor
P1557
BAT TMP SEN/CIRC
(Battery temperature sensor
circuit high input)
Signal voltage from Battery
temperature sensor remains
4.84V or more for 5 seconds
or more.
Battery current sensor
Ground
Voltage (V)
Connector
Terminal
E63
1
Ground
Approx. 5
P1556, P1557 BATTERY TEMPERATURE SENSOR
EC-429
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
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2.
CHECK BATTERY TEMPERATURE SENSOR INPUT SIGNAL CIRCUIT-II
1.
Turn ignition switch ON.
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 3.
NO
>> Repair open circuit.
3.
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 4.
NO
>> Repair short to ground or short to power in harness or connectors.
4.
CHECK COMPONENTS
Check the following.
• Camshaft position sensor (bank 1) (Refer to
EC-306, "Component Inspection (Camshaft Position Sensor)"
• CKP sensor (Refer to
EC-301, "Component Inspection (Crankshaft Position Sensor)"
• Battery current sensor sensor (Refer to
EC-423, "Component Inspection (Battery Current Sensor)"
.)
• Refrigerant pressure sensor (Refer to
.)
• EVAP control system pressure sensor (Refer to
EC-335, "Component Inspection (EVAP Control System
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace malfunctioning component.
5.
CHECK APP SENSOR
EC-470, "Component Inspection (Accelerator Pedal Position Sensor)"
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 6.
6.
REPLACE ACCELERATOR PEDAL ASSEMBLY
Replace accelerator pedal assembly.
>> INSPECTION END
7.
CHECK BATTERY TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
Battery current sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E63
1
E80
139
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
Battery current sensor
E63
2
Refrigerant pressure sensor
E77
1
EVAP control system pressure sen-
sor
C17
3
131
APP sensor 2 (Without ICC)
E110
1
APP sensor 2 (with ICC)
E67
9
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