P1557 INFINITI QX56 2011 Factory Service Manual

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P1553 BATTERY CURRENT SENSOR ......... ..420
DTC Logic ........................................................... ..420
Diagnosis Procedure .............................................420
Component Inspection (Battery Current Sensor) ..423
P1554 BATTERY CURRENT SENSOR ...........424
DTC Logic ........................................................... ..424
Component Function Check ..................................424
Diagnosis Procedure .............................................425
Component Inspection (Battery Current Sensor) ..427
P1556, P1557 BATTERY TEMPERATURE
SENSOR ...........................................................
428
DTC Logic ........................................................... ..428
Diagnosis Procedure .............................................428
Component Inspection (Battery Temprature Sen-
sor) ........................................................................
430
P1564 ASCD STEERING SWITCH ..................431
DTC Logic ........................................................... ..431
Diagnosis Procedure .............................................431
Component Inspection (ASCD Steering Switch) ...433
P1564 ICC STEERING SWITCH ......................434
DTC Logic ........................................................... ..434
Diagnosis Procedure .............................................434
Component Inspection (ICC Steering Switch) .......436
P1568 ICC FUNCTION .....................................437
DTC Logic ........................................................... ..437
Diagnosis Procedure .............................................437
P1572 ASCD BRAKE SWITCH .......................438
DTC Logic ........................................................... ..438
Diagnosis Procedure .............................................439
Component Inspection (ASCD Brake Switch) .......442
Component Inspection (Stop Lamp Switch) ..........442
P1572 ICC BRAKE SWITCH ...........................443
DTC Logic ........................................................... ..443
Diagnosis Procedure .............................................444
Component Inspection (ICC Brake Switch) ...........445
Component Inspection (Stop Lamp Switch) ..........446
P1574 ASCD VEHICLE SPEED SENSOR ......447
Description .......................................................... ..447
DTC Logic .............................................................447
Diagnosis Procedure .............................................447
P1574 ICC VEHICLE SPEED SENSOR ..........449
Description .......................................................... ..449
DTC Logic .............................................................449
Diagnosis Procedure .............................................449
P1606 VVEL CONTROL MODULE ..................451
DTC Logic ........................................................... ..451
Diagnosis Procedure .............................................451
P1607 VVEL CONTROL MODULE ..................452
DTC Logic ........................................................... ..452
Diagnosis Procedure .............................................452
P1608 VVEL SENSOR POWER SUPPLY ......453
DTC Logic ............................................................ ..453
Diagnosis Procedure .............................................453
P1805 BRAKE SWITCH .................................455
DTC Logic ..............................................................455
Diagnosis Procedure .............................................455
Component Inspection (Stop Lamp Switch) ..........456
P2100, P2103 THROTTLE CONTROL MO-
TOR RELAY ....................................................
458
DTC Logic ..............................................................458
Diagnosis Procedure .............................................458
P2101 ELECTRIC THROTTLE CONTROL
FUNCTION ......................................................
460
Description ........................................................... ..460
DTC Logic ..............................................................460
Diagnosis Procedure .............................................460
Component Inspection ...........................................462
Special Repair Requirement ..................................463
P2118 THROTTLE CONTROL MOTOR .........464
DTC Logic ..............................................................464
Diagnosis Procedure .............................................464
Component Inspection (Electric Throttle Control
Motor) ....................................................................
465
P2119 ELECTRIC THROTTLE CONTROL
ACTUATOR .....................................................
466
DTC Logic ..............................................................466
Diagnosis Procedure .............................................466
P2122, P2123 APP SENSOR .........................468
DTC Logic ..............................................................468
Diagnosis Procedure .............................................468
Component Inspection (Accelerator Pedal Posi-
tion Sensor) ...........................................................
470
P2127, P2128 APP SENSOR .........................471
DTC Logic ..............................................................471
Diagnosis Procedure .............................................471
Component Inspection (Accelerator Pedal Posi-
tion Sensor) ...........................................................
474
P2135 TP SENSOR .........................................475
DTC Logic ..............................................................475
Diagnosis Procedure .............................................475
Component Inspection (Throttle Position Sensor) ..476
P2138 APP SENSOR ......................................478
DTC Logic ..............................................................478
Diagnosis Procedure .............................................478
Component Inspection (Accelerator Pedal Posi-
tion Sensor) ...........................................................
481
P2539, P2541, P2542 LOW FUEL PRES-
SURE SENSOR ...............................................
483
DTC Logic ..............................................................483
Diagnosis Procedure .............................................483
Component Inspection ...........................................485
Revision: 2010 May2011 QX56

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< ECU DIAGNOSIS INFORMATION > [VK56VD]
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Priority Detected items (DTC)
1  U0101 CAN communication line  U0113 U1003 CAN communication line
 U1001 CAN communication line
 U1024 VVEL CAN communication line
 P006A P0101 P0102 P0103 Mass air flow sensor
 P010A Manifold absolute pressure sensor
 P0112 P0113 P0127 Intake air temperature sensor
 P0116 P0117 P0118 P0125 Engine coolant temperature sensor
 P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor
 P0128 Thermostat function
 P0181 P0182 P0183 Fuel tank temperature sensor
 P0196 P0197 P0198 Engine oil temperature sensor
 P0327 P0328 P0332 P0333 Knock sensor
 P0335 Crankshaft position sensor
 P0340 P0345 Camshaft position sensor
 P0460 P0461 P0462 P0463 Fuel level sensor
 P0500 Vehicle speed sensor
 P0527 Cooling fan speed sensor
 P0605 P0607 P0611 P062B ECM
 P0643 Sensor power supply
 P0700 TCM
 P0705 P0850 Transmission range switch
 P1089 P1092 P1608 VVEL control shaft position sensor
 P1197 Out of gas*
 P1220 Fuel pump control module (FPCM)
 P1421 P1423 P1424 Cold start control
 P1550 P1551 P1552 P1553 P1554 Battery current sensor
 P1556 P1557 Battery temperature sensor
 P1606 P1607 VVEL control module
 P1610 - P1615 NATS
 P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor
 P2539 P2541 P2542 Low fuel pressure sensor
Revision: 2010 May2011 QX56

EC-102
< ECU DIAGNOSIS INFORMATION >[VK56VD]
ECM
P0731 0731
1GR INCORRECT RATIO*7—2 ×TM-118
P0732 0732
2GR INCORRECT RATIO*7—2 ×TM-120
P0733 0733
3GR INCORRECT RATIO*7—2 ×TM-122
P0734 0734
4GR INCORRECT RATIO*7—2 ×TM-124
P0735 0735
5GR INCORRECT RATIO*7—2 ×TM-126
P0740 0740 TORQUE CONVERTER — 2 ×TM-128
P0744 0744 TORQUE CONVERTER — 2 ×TM-129
P0745 0745 PC SOLENOID A — 2 ×TM-131
P0750 0750 SHIFT SOLENOID A — 2 ×TM-132
P0775 0775 PC SOLENOID B — 2 ×TM-133
P0780 0780 SHIFT — 1 ×TM-134
P0795 0795 PC SOLENOID C — 2 ×TM-136
P0850 0850 P-N POS SW/CIRCUIT — 2 ×EC-383
P1087 1087 VVEL SYSTEM-B1 — 1 ×EC-386
P1088 1088 VVEL SYSTEM-B2 — 1 ×EC-386
P1089 1089 VVEL POS SEN/CIRC-B1 — 1 ×EC-387
P1090 1090 VVEL ACTR MOT-B1 — 1 ×EC-390
P1091 1091 VVEL ACTR MOT PWR — 1 ×EC-393
P1092 1092 VVEL POS SEN/CIRC-B2 — 1 ×EC-387
P1093 1093 VVEL ACTR MOT-B2 — 1 ×EC-390
P1148 1148 CLOSED LOOP-B1 — 1 ×EC-396
P1168 1168 CLOSED LOOP-B2 — 1 ×EC-396
P1197 1197 FUEL RUN OUT — 2 — EC-397
P1212 1212 TCS/CIRC — 2 — EC-399
P1217 1217 ENG OVER TEMP — 1×EC-400
P1220 1220 FPCM — 1 — EC-403
P1225 1225 CTP LEARNING-B1 — 2 —EC-406
P1226 1226 CTP LEARNING-B1 — 2 —EC-407
P1421 1421 COLD START CONTROL — 2×EC-408
P1423 1423 COLD START CONTROL — 2 ×EC-410
P1424 1424 COLD START CONTROL — 2 ×EC-410
P1550 1550 BAT CURRENT SENSOR — 2 — EC-412
P1551 1551 BAT CURRENT SENSOR — 2 —EC-416
P1552 1552 BAT CURRENT SENSOR — 2 —EC-416
P1553 1553 BAT CURRENT SENSOR — 2 —EC-420
P1554 1554 BAT CURRENT SENSOR — 2 —EC-424
P1556 1556 BAT TMP SEN/CIRC — 2 —EC-428
P1557 1557 BAT TMP SEN/CIRC — 2 —EC-428
P1564 1564 ASCD SW — 1 —EC-431(with ASCD)
EC-434
(with ICC)
P1568 1568 ICC COMMAND VALUE — 1 — EC-437
DTC*1
Items
(CONSULT-III screen terms) SRT code Trip MIL Reference
page
CONSULT-III
GST*
2ECM*3
Revision: 2010 May2011 QX56

EC-428
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
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
< 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 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
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
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