ground INFINITI QX56 2011 Factory Service Manual

CHG
B TERMINAL CIRCUITCHG-19
< DTC/CIRCUIT DIAGNOSIS >
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DTC/CIRCUIT DIAGNOSIS
B TERMINAL CIRCUIT
DescriptionINFOID:0000000006274868
“B” terminal circuit supplies power to charge the bat
tery and to operate the vehicle’s electrical system.
Diagnosis ProcedureINFOID:0000000006274869
1.CHECK “B” TERMINAL CONNECTION
1. Turn ignition switch OFF.
2. Check that “B” terminal is clean and tight.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair “B” terminal connection. Confirm repair by performing complete Starting/Charging system test. Refer to Technical Service Bulletin.
2.CHECK “B” TERMINAL CIRCUIT
Check voltage between alternator “B” terminal and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check harness for open between alternator and fusible link.
3.CHECK “B” TERMINAL CONNECT ION (VOLTAGE DROP TEST)
1. Start engine, then engine running at idle and warm.
2. Check voltage between battery positive terminal and alternator “B” terminal.
Is the inspection result normal?
YES >> “B” terminal circuit is normal. Refer to CHG-13, "Work Flow".
NO >> Check harness between battery and alternator for poor continuity.
(+)
(–) Voltage
Alternator “B” terminal
E203 1 Ground Battery voltage
(+) (–)
Voltage (V)
(Approx.)
Alternator “B” terminal Terminal
Battery positive terminal E203 1 Less than 0.2
Revision: 2010 May2011 QX56

CHG-20
< DTC/CIRCUIT DIAGNOSIS >
L TERMINAL CIRCUIT (OPEN)
L TERMINAL CIRCUIT (OPEN)
DescriptionINFOID:0000000006274870
The “L” terminal circuit controls the charge warning lamp. The charge warning lamp illuminates when the igni-
tion switch is set to ON or START. When the alternat or is providing sufficient voltage with the engine running,
the charge warning lamp will go off. If the charge warn ing lamp illuminates with the engine running, a malfunc-
tion is indicated.
Diagnosis ProcedureINFOID:0000000006274871
1.CHECK “L” TERMINAL CONNECTION
1. Turn ignition switch OFF.
2. Check that “L” terminal is clean and tight.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair “L” terminal connection. Confirm repair by performing complete Starting/Charging system test. Refer to Technical Service Bulletin.
2.CHECK “L” TERMIN AL CIRCUIT (OPEN)
1. Disconnect alternator connector.
2. Apply ground to alternator harness connector terminal.
3. Check condition of the charge warning lamp with the ignition switch in the ON position.
Does it illuminate?
YES >> “L” terminal circuit is normal. Refer to CHG-13, "Work Flow".
NO >> GO TO 3.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the battery cable from the negative terminal.
2. Disconnect the combination meter connector.
3. Check continuity between alternator harness connector and combination meter harness connector.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair the harness or connector.
4.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
Check continuity between combination me ter harness connector and fuse block (J/B).
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair the harness or connector.
5.CHECK POWER SUPPLY CIRCUIT
(+) (–) Condition Charge warning lamp
Alternator
Connector Terminal E205 3 Ground Ignition switch ON ON
Alternator Combination meter Continuity
Connector Terminal Connector Terminal
E205 3 M34 25 Existed
Combination meter Fuse block (J/B) Continuity
Connector Terminal Connector Terminal
M34 2 M1 2A Existed
Revision: 2010 May2011 QX56

CHG
L TERMINAL CIRCUIT (OPEN)CHG-21
< DTC/CIRCUIT DIAGNOSIS >
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1. Connect the battery cable to the negative terminal.
2. Check voltage between combination meter harness connector and ground.
Is the inspection result normal?
YES >> Replace combination meter.
NO >> Inspect the power supply circuit. Refer to
PG-89, "
Wiring Diagram - IGNITION POWER SUPPLY -
".
(+)
(–) Condition Voltage
Combination meter
Connector Terminal M34 2 Ground Ignition switch ON Battery voltage
Revision: 2010 May2011 QX56

CHG-22
< DTC/CIRCUIT DIAGNOSIS >
L TERMINAL CIRCUIT (SHORT)
L TERMINAL CIRCUIT (SHORT)
DescriptionINFOID:0000000006274872
The “L” terminal circuit controls the charge warning lamp. The charge warning lamp illuminates when the igni-
tion switch is set to ON or START. When the alternat or is providing sufficient voltage with the engine running,
the charge warning lamp will go off. If the charge warn ing lamp illuminates with the engine running, a malfunc-
tion is indicated.
Diagnosis ProcedureINFOID:0000000006274873
1.CHECK “L” TERMINAL CIRCUIT (SHORT)
1. Turn ignition switch OFF.
2. Disconnect alternator connector.
3. Turn ignition switch ON.
Does charge warning lamp illuminate?
YES >> GO TO 2.
NO >> Refer to CHG-13, "
Work Flow".
2.CHECK HARNESS CONTI NUITY (SHORT CIRCUIT)
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect combination meter connector.
4. Check continuity between combination meter harness connector and ground.
Is the inspection result normal?
YES >> Replace combination meter.
NO >> Repair the harness or connector.
Combination meter
GroundContinuity
Connector Terminal
M34 25 Not existed
Revision: 2010 May2011 QX56

CHG
S TERMINAL CIRCUITCHG-23
< DTC/CIRCUIT DIAGNOSIS >
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S TERMINAL CIRCUIT
DescriptionINFOID:0000000006274874
The output voltage of the alternator is controlled by t
he IC voltage regulator at the “S” terminal detecting the
input voltage.
The “S” terminal circuit detects the battery voltage to adjust the alternator output voltage with the IC voltage
regulator.
Diagnosis ProcedureINFOID:0000000006274875
1.CHECK “S” TERMINAL CONNECTION
1. Turn ignition switch OFF.
2. Check if “S” terminal is clean and tight.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair “S” terminal connection. Confirm repair by performing complete Starting/Charging system test. Refer to Technical Service Bulletin.
2.CHECK “S” TERMINAL CIRCUIT
Check voltage between alternator harness connector and ground.
Is the inspection result normal?
YES >> Refer to CHG-13, "Work Flow".
NO >> Check harness for open between alternator and fuse.
(+)
(–) Voltage
Alternator
Connector Terminal E205 4 Ground Battery voltage
Revision: 2010 May2011 QX56

CHG
ALTERNATORCHG-25
< REMOVAL AND INSTALLATION >
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REMOVAL AND INSTALLATION
ALTERNATOR
Exploded ViewINFOID:0000000006274877
REMOVAL
DISASSEMBLY
1. Alternator bracket 2. Alternator bracket mounting bolt 3. “B” terminal harness
4. “B” terminal nut 5. Alternator connector 6. Alternator
7. Alternator stay 8. Alternator mounting bolt (lower) 9. Alternator stay mounting bolt
10. Ground harness 11. Alternator mounting bolt (upper)
Refer to
GI-4, "
Components" for symbols in the figure.
JMMIA0361GB
Revision: 2010 May2011 QX56

CHG
ALTERNATORCHG-27
< REMOVAL AND INSTALLATION >
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7. Remove ground harness mounting bolt.
8. Remove alternator mounting bolt (lower), and then alternator mounting bolt (upper).
9. Remove A/T fluid cooler tube (1) from fan shroud (2).
10. Move A/T fluid cooler tube (1) and secure work space.
11. Remove alternator assembly
(2) from underneath the vehicle.
INSTALLATION
Note the following items, and then install in the reverse order of removal.
CAUTION:
 Be careful to tighten “B” terminal nut carefully.
 Install alternator, and check tension of belt. Refer to EM-20, "
Checking".
 For this model, the power genera tion voltage variable control system that controls the power gener-
ation voltage of the alternator has been adopted. Therefore, the power generation voltage variable
control system operation inspectio n should be performed after replacing the alternator, and then
make sure that the system operates normally. Refer to CHG-17, "
Inspection Procedure".
 When installing alternator br acket, tighten mounting bolts in
numerical order as shown in the figure.
JMMIA0365ZZ
JMMIA0366ZZ
JMMIA0367ZZ
JMMIA0456ZZ
Revision: 2010 May2011 QX56

CHG
SERVICE DATA AND SPECIFICATIONS (SDS)
CHG-29
< SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
AlternatorINFOID:0000000006274881
*: Adjustment range of power generation voltage variable control is 11.4 - 15.6 V. Ty p e
A002TX1491
MITSUBISHI make
Nominal rating [V - A] 12 -150
Ground polarity Negative
Minimum revolution under no-load (When 13.5 V is ap-
plied) [rpm] Less than 1,300
Hot output current (When 13.5 V is applied) [A/rpm] More than 57/1,500
More than 126/2,500
More than 152/5,000
Regulated output voltage [V] 14.1 - 14.7
*
Revision: 2010 May2011 QX56

DAS-1
CRUISE CONTROL & DRIVER ASSISTANCE
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DAS
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CONTENTS
DRIVER ASSISTANCE SYSTEM
ADAS CONTROL UNIT
PRECAUTION ................ ..............................
12
PRECAUTIONS .............................................. ....12
Precautions For Harness Repair ......................... ....12
SYSTEM DESCRIPTION .............................13
COMPONENT PARTS ................................... ....13
Component Parts Location .................................. ....13
Component Description ...........................................13
SYSTEM .............................................................14
System Description ............................................. ....14
Fail-safe ..................................................................18
DIAGNOSIS SYSTEM (ADAS CONTROL
UNIT) ..................................................................
20
On Board Diagnosis Function ............................. ....20
CONSULT-III Function (ICC/ADAS) ........................21
ECU DIAGNOSIS INFORMATION ..............31
ADAS CONTROL UNIT .................................. ....31
Reference Value ................................................. ....31
Fail-safe ..................................................................36
DTC Inspection Priority Chart .................................37
DTC Index ...............................................................38
WIRING DIAGRAM ......................................42
DRIVER ASSISTANCE SYSTEMS ................ ....42
Wiring Diagram ................................................... ....42
DTC/CIRCUIT DIAGNOSIS .........................57
C1A00 CONTROL UNIT ................................. ....57
DTC Logic ........................................................... ....57
Diagnosis Procedure ...............................................57
C1A01 POWER SUPPLY CIRCUIT 1, C1A02
POWER SUPPLY CIRCUIT 2 ............................
58
DTC Logic ............................................................ ....58
Diagnosis Procedure ...............................................58
U1000 CAN COMM CIRCUIT ...........................59
Description ...............................................................59
DTC Logic ................................................................59
Diagnosis Procedure ...............................................59
U1010 CONTROL UNIT (CAN) .........................60
Description ...............................................................60
DTC Logic ................................................................60
Diagnosis Procedure ...............................................60
U150F AV CAN 3 ..............................................61
DTC Logic ................................................................61
Diagnosis Procedure ...............................................61
POWER SUPPLY AND GROUND CIRCUIT ....62
Diagnosis Procedure ...............................................62
REMOVAL AND INSTALLATION ...............63
ADAS CONTROL UNIT ....................................63
Removal and Installation ..................................... ....63
DCA
PRECAUTION ............... ...............................
64
PRECAUTIONS .................................................64
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
64
Precautions For Harness Repair .............................64
DCA System Service ...............................................65
SYSTEM DESCRIPTION .............................66
COMPONENT PARTS ......................................66
Component Parts Location .................................. ....66
Component Description ...........................................67
SYSTEM ............................................................68
System Description .............................................. ....68
Revision: 2010 May2011 QX56

DAS-4
DTC Logic ..............................................................180
Diagnosis Procedure .............................................180
U0428 STRG SEN CAN 2 ................................181
DTC Logic ............................................................ ..181
Diagnosis Procedure .............................................181
U1000 CAN COMM CIRCUIT ..........................182
ADAS CONTROL UNIT ......................................... ..182
ADAS CONTROL UNIT : Description ....................182
ADAS CONTROL UNIT : DTC Logic .....................182
ADAS CONTROL UNIT : Diagnosis Procedure .....182
ACCELERATOR PEDAL ACTUATOR .................. ..182
ACCELERATOR PEDAL ACTUATOR : Descrip-
tion .........................................................................
182
ACCELERATOR PEDAL ACTUATOR : DTC Log-
ic ............................................................................
182
ACCELERATOR PEDAL ACTUATOR : Diagnosis
Procedure ..............................................................
183
U1010 CONTROL UNIT (CAN) .......................184
ADAS CONTROL UNIT ......................................... ..184
ADAS CONTROL UNIT : Description ....................184
ADAS CONTROL UNIT : DTC Logic .....................184
ADAS CONTROL UNIT : Diagnosis Procedure .....184
ACCELERATOR PEDAL ACTUATOR .................. ..184
ACCELERATOR PEDAL ACTUATOR : Descrip-
tion .........................................................................
184
ACCELERATOR PEDAL ACTUATOR : DTC Log-
ic ............................................................................
184
ACCELERATOR PEDAL ACTUATOR : Diagnosis
Procedure ..............................................................
184
U150B ECM CAN 3 .........................................185
DTC Logic ............................................................ ..185
Diagnosis Procedure .............................................185
U150C VDC CAN 3 ..........................................186
DTC Logic ............................................................ ..186
Diagnosis Procedure .............................................186
U150D TCM CAN 3 ..........................................187
DTC Logic ............................................................ ..187
Diagnosis Procedure .............................................187
U150E BCM CAN 3 .........................................188
DTC Logic ............................................................ ..188
Diagnosis Procedure .............................................188
U1502 ICC SENSOR CAN COMM CIRC ........189
DTC Logic ............................................................ ..189
Diagnosis Procedure .............................................189
U1513 METER CAN 3 .....................................190
DTC Logic ............................................................ ..190
Diagnosis Procedure .............................................190
U1514 STRG SEN CAN 3 ................................191
DTC Logic ............................................................ ..191
Diagnosis Procedure ............................................ .191
U1515 ICC SENSOR CAN 3 ............................192
DTC Logic ............................................................ .192
Diagnosis Procedure .............................................192
U1517 ACCELERATOR PEDAL ACTUATOR
CAN 3 ...............................................................
193
DTC Logic ............................................................ .193
Diagnosis Procedure .............................................193
U1520 4WD CAN 3 ...........................................194
DTC Logic ............................................................ .194
Diagnosis Procedure .............................................194
POWER SUPPLY AND GROUND CIRCUIT ....195
ADAS CONTROL UNIT .......................................... .195
ADAS CONTROL UNIT : Diagnosis Procedure ....195
ACCELERATOR PEDAL ACTUATOR .................. .195
ACCELERATOR PEDAL ACTUATOR : Diagnosis
Procedure .............................................................
195
SYMPTOM DIAGNOSIS ...........................197
DISTANCE CONTROL ASSIST SYSTEM
SYMPTOMS .................................................... ..
197
Symptom Table .................................................... .197
SWITCH DOES NOT TURN ON / SWITCH
DOES NOT TURN OFF .................................. ..
198
Description ........................................................... .198
Diagnosis Procedure .............................................198
DCA SYSTEM SETTINGS CANNOT BE
TURNED ON/OFF ON THE NAVIGATION
SCREEN ...........................................................
200
Description ........................................................... .200
Diagnosis Procedure .............................................200
DCA SYSTEM NOT ACTIVATED (SWITCH IS
ON) ....................................................................
201
Description ........................................................... .201
Diagnosis Procedure .............................................201
CHIME DOES NOT SOUND .............................203
Description ........................................................... .203
Diagnosis Procedure .............................................203
NO FORCE GENERATED FOR PUTTING
BACK THE ACCELERATOR PEDAL ..............
205
Description ........................................................... .205
Diagnosis Procedure .............................................205
FREQUENTLY CANNOT DETECT THE VEHI-
CLE AHEAD / DETECTION ZONE IS SHORT ..
206
Description ........................................................... .206
Diagnosis Procedure .............................................206
THE SYSTEM DOES NOT DETECT THE VE-
HICLE AHEAD AT ALL ....................................
208
Revision: 2010 May2011 QX56