2009 INFINITI QX56 Factory Service Manual

cooling change key battery airbag oil level seats fuel

Page 729 of 4171

INFINITI QX56 2009 Factory Service Manual CHG-6
< FUNCTION DIAGNOSIS >
CHARGING SYSTEM
FUNCTION DIAGNOSIS
CHARGING SYSTEM
System DiagramINFOID:0000000003776542
System DescriptionINFOID:0000000003776543
The generator provides DC voltage to ope

Page 730 of 4171

INFINITI QX56 2009 Factory Service Manual CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
CHG-7
< FUNCTION DIAGNOSIS >
C
D E
F
G H
I
J
K L
B A
O P
N
POWER GENERATION VOLTAG
E VARIABLE CONTROL SYSTEM
System DiagramINFOID:0000000003776545

CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
CHG-7
< FUNCTION DIAGNOSIS >
C
D E
F
G H
I
J
K L
B A
O P
N
POWER GENERATION VOLTAG
E VARIABLE CONTROL SYSTEM
System DiagramINFOID:0000000003776545
System DescriptionINFOID:0000000003776546
Power generation variable voltage control system has been adopted. By varying the voltage to the generator,
engine load due to power generation of the generator is reduced and fuel consumption is decreased.
NOTE:
When any malfunction is detected in the power generat ion variable voltage control system, power generation
is performed according to the characterist ic of the IC regulator in the generator.
Component DescriptionINFOID:0000000003776547
ALMIA0057GB
Component part Description
Battery current sensor The battery current sensor is installed on the battery cable at the
negative terminal. The battery current sensor detects the charg-
ing/discharging current of the battery and sends a voltage signal
to the ECM according to the current value detected.
ECM The battery current sensor detects the charging/discharging cur-
rent of the battery. The ECM judges the battery condition based on
this signal.
The ECM judges whether to request more output via the power
generation voltage variable control according to the battery condi-
tion.
When performing the power generation voltage variable control,
the ECM calculates the target power generation voltage according
to the battery condition and sends the calculated value as the pow-
er generation command value to the IPDM E/R.
IPDM E/R The IPDM E/R converts the received power generation command
value into a pulse width modulated (PWM) command signal and
sends it to the IC regulator.
Generator (IC regulator) The IC regulator controls the power generation voltage by the tar-
get power generation voltage based on the received PWM com-
mand signal.
When there is no PWM command signal, the generator performs
the normal power generation according to the characteristic of the
IC regulator.
Revision: December 20092009 QX56

Page 731 of 4171

INFINITI QX56 2009 Factory Service Manual CHG-8
< COMPONENT DIAGNOSIS >
CHARGING SYSTEM PRELIMINARY INSPECTION
COMPONENT DIAGNOSIS
CHARGING SYSTEM PRELIMINARY INSPECTION
Inspection ProcedureINFOID:0000000003776548
1.CHECK BATTERY TERMINALS CO

Page 732 of 4171

INFINITI QX56 2009 Factory Service Manual CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
CHG-9
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K L
B A
O P
N
POWER GENERATION VOLTAGE VARI
ABLE CONTROL SYSTEM OPER-
ATION INSP

CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
CHG-9
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K L
B A
O P
N
POWER GENERATION VOLTAGE VARI
ABLE CONTROL SYSTEM OPER-
ATION INSPECTION
Inspection ProcedureINFOID:0000000003776549
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 (ENGINE)".
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. The selector lever is in “P” or “N” position and a ll of the electric loads and A/C, etc. are turned OFF.
3. Select “ALTERNATOR DUTY” in “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 val ue within 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-14, "
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 GE NERATOR AND IPDM E/R
1. Turn ignition switch OFF.
2. Disconnect generator connector E205 and IPDM E/R connector E122.
3. Check continuity between generator harness connector E205 (A) terminal 4 and IPDM E/R harness connector E122 (B) termi-
nal 37. “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 %
AB
Continuity
Connector Terminal Connector Terminal
E205 4E122 37Yes
ALMIA0196ZZ
Revision: December 20092009 QX56

Page 733 of 4171

INFINITI QX56 2009 Factory Service Manual CHG-10
< COMPONENT DIAGNOSIS >
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
4. Check continuity between generator harnes s connector E122 (A) terminal 4 and ground.
Are the c

Page 734 of 4171

INFINITI QX56 2009 Factory Service Manual CHG
B TERMINAL CIRCUITCHG-11
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K L
B A
O P
N
B TERMINAL CIRCUIT
DescriptionINFOID:0000000003776550
The terminal “1” circuit supplies power to charge the batter

Page 735 of 4171

INFINITI QX56 2009 Factory Service Manual CHG-12
< COMPONENT DIAGNOSIS >
L TERMINAL CIRCUIT
L TERMINAL CIRCUIT
DescriptionINFOID:0000000003776552
The terminal “2” (L) circuit controls the charge warning lamp. The charge warning lamp illum

Page 736 of 4171

INFINITI QX56 2009 Factory Service Manual CHG
S TERMINAL CIRCUITCHG-13
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K L
B A
O P
N
S TERMINAL CIRCUIT
DescriptionINFOID:0000000003776554
The output voltage of the generator is controlled by the IC
reg

Load next 8 pages

Page: < prev 1-10 ... 697-704 705-712 713-720 721-728 729-736 737-744 745-752 753-760 761-768 ... 4176 next >

brake sensor clock reset snow chains mirror check engine light oil additives