2011 INFINITI QX56 Factory Service Manual

service indicator steering maintenance schedule change key battery coolant level airbag off

Page 929 of 5598

INFINITI QX56 2011 Factory Service Manual
CHG-16
< BASIC INSPECTION >
CHARGING SYSTEM PRELIMINARY INSPECTION
CHARGING SYSTEM PRELIMINARY INSPECTION
Inspection ProcedureINFOID:0000000006274866
1.CHECK BATTERY TERMINALS CONNECTION
Check if bat

Page 930 of 5598

INFINITI QX56 2011 Factory Service Manual
CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
CHG-17
< BASIC INSPECTION >
C
DE
F
G H
I
J
K L
B A
O P
N
POWER GENERATION VOLTAGE VA
RIABLE CONTROL SYSTEM OPER-
ATION INSPE

CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
CHG-17
< BASIC INSPECTION >
C
DE
F
G H
I
J
K L
B A
O P
N
POWER GENERATION VOLTAGE VA
RIABLE CONTROL SYSTEM OPER-
ATION INSPECTION
Inspection ProcedureINFOID:0000000006274867
CAUTION:
When performing this inspection, always use a charged battery that has completed the battery inspec-
tion. (When the charging rate of the battery is low, the response speed of the voltage change will
become slow. This can cause an incorrect inspection.)
1.CHECK ECM (CONSULT-III)
Perform ECM self-diagnosis with CONSULT-III. Refer to EC-63, "
CONSULT-III Function".
Self
-diagnostic results content
No malfunction detected>> GO TO 2.
Malfunction detected>> Check applicable parts, and repair or replace corresponding parts.
2.CHECK OPERATION OF POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
1. Connect CONSULT-III and start the engine.
2. shift the selector lever to “P” or “N” position and turn off all of the electric loads and A/C, etc.
3. Select “ALTERNATOR DUTY” at “Active Test” of “ENGINE”, and then check the value of “BATTERY
VOLT” monitor when DUTY value of “ALTERNATOR DUTY” is set to 40.0 %.
4. Check the value of “BATTERY VOLT” monitor when DUTY value of “ALTERNATOR DUTY” is set to 80.0%.
Is the measurement value within the specification?
YES >> INSPECTION END
NO >> GO TO 3.
3.CHECK IPDM E/R (CONSULT-III)
Perform IPDM E/R self-diagnosis with CONSULT-III. Refer to PCS-12, "
CONSULT-III Function (IPDM E/R)".
Self
-diagnostic results content
No malfunction detected>> GO TO 4.
Malfunction detected>> Check applicable parts, and repair or replace corresponding parts.
4.CHECK HARNESS BETWEEN ALTE RNATOR AND IPDM E/R
1. Turn ignition switch OFF.
2. Disconnect alternator harness connec tor and IPDM E/R harness connector.
3. Check continuity between alternator har ness connector and IPDM E/R harness connector.
4. Check continuity between alte rnator harness connector and ground.
“BATTERY VOLT”
2 seconds after setting the
DUTY value of “ALTERNA-
TOR DUTY” to 40.0 %
: 12 - 13.6 V
“BATTERY VOLT”
20 seconds after setting
the DUTY value of “ALTER-
NATOR DUTY” to 80.0 % : +0.5 V or more against
the value of “BATTERY
VOLT” monitor when
DUTY value is 40.0 %
Alternator IPDM E/R
Continuity
Connector Terminal Connector Terminal
E205 5 E13 33 Existed
Revision: 2010 May2011 QX56

Page 931 of 5598

INFINITI QX56 2011 Factory Service Manual
CHG-18
< BASIC INSPECTION >
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
Is the inspection result normal?
YES >> Replace IPDM E/R.
NO >> Repair harness or connector between

Page 932 of 5598

INFINITI QX56 2011 Factory Service Manual
CHG
B TERMINAL CIRCUITCHG-19
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K L
B A
O P
N
DTC/CIRCUIT DIAGNOSIS
B TERMINAL CIRCUIT
DescriptionINFOID:0000000006274868
“B” terminal circuit supplies power

Page 933 of 5598

INFINITI QX56 2011 Factory Service Manual
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 warni

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

Page 934 of 5598

INFINITI QX56 2011 Factory Service Manual
CHG
L TERMINAL CIRCUIT (OPEN)CHG-21
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K L
B A
O P
N
1. Connect the battery cable to the negative terminal.
2. Check voltage between combination meter harness co

Page 935 of 5598

INFINITI QX56 2011 Factory Service Manual
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 war

Page 936 of 5598

INFINITI QX56 2011 Factory Service Manual
CHG
S TERMINAL CIRCUITCHG-23
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K L
B A
O P
N
S TERMINAL CIRCUIT
DescriptionINFOID:0000000006274874
The output voltage of the alternator is controlled by t
he IC

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