ground INFINITI QX56 2011 Factory Service Manual

P1553 BATTERY CURRENT SENSOREC-423
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Component Inspection (B
attery 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 +–
Te r m i n a l Te r m i n a l
E80 138
(Battery current sensor signal) 150 Approx. 2.5
JPBIA3287ZZ
Revision: 2010 May2011 QX56

P1554 BATTERY CURRENT SENSOREC-425
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Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to
EC-425, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID: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 cu rrent 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 +–
Te r m i n a l Te r m i n a l
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
Revision: 2010 May2011 QX56

EC-426
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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
Refer to 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 ACC-4, "MODELS WITH
DISTANCE CONTROL ASSIST SYSTEM : Removal and Installation" (With distance control assist system).
>> INSPECTION END
8.CHECK BATTERY CURRENT SENSOR GRO UND 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
E80133
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
Revision: 2010 May2011 QX56

P1554 BATTERY CURRENT SENSOREC-427
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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
Refer to 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
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component Inspection (B attery 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 +–
Te r m i n a l Te r m i n a l
E80 138
(Battery current sensor signal) 150 Approx. 2.5
JPBIA3287ZZ
Revision: 2010 May2011 QX56

EC-428
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P1556, P1557 BATTERY
TEMPERATURE SENSOR
P1556, P1557 BATTERY TEMPERATURE SENSOR
DTC LogicINFOID: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 EC-381, "
DTC 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, confi rm 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 EC-428, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID: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
Revision: 2010 May2011 QX56

P1556, P1557 BATTERY TEMPERATURE SENSOR
EC-429
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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 EC-520, "
Diagnosis Procedure".)
 EVAP control system pressure sensor (Refer to EC-335, "
Component Inspection (EVAP Control System
Pressure Sensor)".)
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace malfunctioning component.
5.CHECK APP SENSOR
Refer to 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 133Battery 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
Revision: 2010 May2011 QX56

EC-430
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P1556, P1557 BATTERY
TEMPERATURE SENSOR
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 8.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
8.CHECK BATTERY TEMPERATURE SENSOR
Refer to EC-430, "
Component Inspection (Battery Temprature Sensor)".
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace battery negative cable assembly.
9.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component Inspection (Ba ttery Temprature Sensor)INFOID:0000000006217934
1.CHECK BATTERY TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect battery current sensor.
3. Check the resistance between battery current sensor connector terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace battery negative cable assembly.
Battery current sensor ECM Continuity
Connector Terminal Connector Terminal
E63 4 E80 150 Existed
Battery current sensor Resistance
+ −
Te r m i n a l
14 continuity with the resis-
tance value 100
Ω or more
Revision: 2010 May2011 QX56

EC-432
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P1564 ASCD STEERING SWITCH
WITHOUT CONSULT-III
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 2.
2.CHECK ASCD STEERING SWITCH GRO UND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect combination switch harness connector.
4. Check the continuity between combination switch and ECM harness connector.
5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
 Combination switch (spiral cable)
 Harness for open and short between ECM and combination switch
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK ASCD STEERING SWITCH INPUT SI GNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between combination switch and ECM harness connector.
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
SET SW SET/COAST switch Pressed ON
Released OFF
ECM Condition Voltage (V)
Connector +–
Te r m i n a l Te r m i n a l
E80 128
(ASCD steering switch signal) 130MAIN switch: Pressed Approx. 0
CANCEL switch: Pressed Approx. 1
SET/COAST switch: Pressed Approx. 2
RESUME/ACCELERATE switch: Pressed Approx. 3
All ASCD steering switches: Released Approx. 4
Monitor item Condition Indication
Combination switch ECM
Continuity
Connector Terminal Connector Terminal
— 32 E80 130 Existed
Combination switch ECM Continuity
Connector Terminal Connector Terminal
— 25 E80 128 Existed
Revision: 2010 May2011 QX56

P1564 ASCD STEERING SWITCHEC-433
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5.DETECT MALFUNCTIONING PART
Check the following.
 Combination switch (spiral cable)
 Harness for open and short between ECM and combination switch
>> Repair open circuit, short to ground or short to power in harness or connectors.
6.CHECK ASCD STEERING SWITCH
Refer to EC-433, "
Component Inspection (ASCD Steering Switch)".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace ASCD steering switch. Refer to ST-33, "
Removal and Installation".
7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component Inspection (A SCD Steering Switch)INFOID:0000000006217937
1.CHECK ASCD STEERING SWITCH
1. Turn ignition switch OFF.
2. Disconnect combination switch (spiral cable) harness connector M302.
3. Check resistance between combination switch har ness connector terminals under the following condi-
tions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace ASCD steering switch. Refer to ST-33, "
Removal and Installation".
Combination switch
Condition Resistance ( Ω)
Connector Terminals
M302 13 and 16 MAIN switch: Pressed Approx. 0
CANCEL switch: Pressed Approx. 250
SET/COAST switch: Pressed Approx. 660
RESUME/ACCELERATE switch: Pressed Approx. 1,480
All ASCD steering switches: Released Approx. 4,000
Revision: 2010 May2011 QX56

P1564 ICC STEERING SWITCHEC-435
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Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 2.
2.CHECK ICC STEERING SWITCH GRO
UND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect combination switch harness connector.
4. Check the continuity between combination switch and ECM harness connector.
5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.DETECT MALFUNCTIONING PART
Check the following.
 Combination switch (spiral cable)
 Harness for open and short between ECM and combination switch
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK ICC STEERING SWITCH INPUT SI GNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between combination switch and ECM harness connector.
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
 Combination switch (spiral cable)
 Harness for open and short between ECM and combination switch
ECM
Condition Voltage (V)
Connector +–
Te r m i n a l Te r m i n a l
E80 128
(ICC steering switch signal) 130MAIN switch: Pressed Approx. 0
DYNAMIC DRIVER ASSISTANCE switch: Pressed Approx. 1.0
CANCEL switch: Pressed Approx. 1.9
DISTANCE switch: Pressed Approx. 2.6
SET/COAST switch: Pressed Approx. 3.2
RESUME/ACCELERATE switch: Pressed Approx. 3.7
All ICC steering switches: Released Approx. 4.2
Combination switch ECM
Continuity
Connector Terminal Connector Terminal
— 32 E80 130 Existed
Combination switch ECM Continuity
Connector Terminal Connector Terminal
— 25 E80 130 Existed
Revision: 2010 May2011 QX56