2011 Nissan Maxima Service & Repair Manual Software
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CHG
CHG-1
ELECTRICAL & POWER CONTROL
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SECTION CHG
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CONTENTS
CHARGING SYSTEM
BASIC INSPECTION ................................... 2
DIAGNOSIS AND REPAIR WORKFLOW ......... 2
Work Flow ................................................................ 2
SYSTEM DESCRIPTION ............................. 3
CHARGING SYSTEM ......................................... 3
System Diagram ....................................................... 3
System Description .................................................. 3
Component Description ........................................... 3
POWER GENERATION VOLTAGE VARI-
ABLE CONTROL SYSTEM ................................ 4
System Diagram ....................................................... 4
System Description .................................................. 4
Component Description ............................................ 4
DTC/CIRCUIT DIAGNOSIS ......................... 5
CHARGING SYSTEM PRELIMINARY IN-
SPECTION .......................................................... 5
Inspection Procedure ............................................... 5
POWER GENERATION VOLTAGE VARI-
ABLE CONTROL SYSTEM OPERATION IN-
SPECTION .......................................................... 6
Inspection Procedure ............................................... 6
B TERMINAL CIRCUIT ...................................... 8
Description ............................................................... 8
Diagnosis Procedure ................................................ 8
L TERMINAL CIRCUIT ....................................... 9
Description ............................................................... 9
Diagnosis Procedure ................................................ 9
S TERMINAL CIRCUIT .....................................10
Description ............................................................. 10
Diagnosis Procedure .............................................. 10
WIRING DIAGRAM ..................................... 11
CHARGING SYSTEM ....................................... 11
Wiring Diagram .......................................................11
SYMPTOM DIAGNOSIS ............................. 18
CHARGING SYSTEM ....................................... 18
Symptom Table ......................................................18
PRECAUTION ............................................. 19
PRECAUTIONS ................................................. 19
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ................................................................19
Precaution for Power Generation Voltage Variable
Control System .......................................................19
PREPARATION .......................................... 20
PREPARATION ................................................. 20
Special Service Tool ...............................................20
Commercial Service Tool .......................................20
REMOVAL AND INSTALLATION .............. 21
GENERATOR .................................................... 21
Exploded View ........................................................21
Removal and Installation ........................................21
Inspection ...............................................................22
SERVICE DATA AND SPECIFICATIONS
(SDS) ........................................................... 23
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................. 23
Generator ...............................................................23
Revision: January 2012 2011 Maxima
CHG-2
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow INFOID:0000000006234479
OVERALL SEQUENCE
AWMIA1142GB
Revision: January 2012 2011 Maxima
CHG
CHARGING SYSTEM
CHG-3
< SYSTEM DESCRIPTION >
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SYSTEM DESCRIPTION
CHARGING SYSTEM
System Diagram INFOID:0000000006234480
System Description INFOID:0000000006234481
The generator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged.
The voltage output is controlled by the IC regulator.
Component Description INFOID:0000000006234482
ALMIA0207GB
Component part Description
Generator
Terminal “1” Refer to CHG-8, "Description" .
Terminal “2” Refer to CHG-9, "Description" .
Terminal “3” Refer to CHG-10, "Description" .
Terminal “4”
Used for the power generation voltage variable control system.
Refer to CHG-4, "System Description" .
Combination meter (Charge warning lamp)
The IC regulator warning function activates to illuminate the
charge warning lamp if any of the following symptoms occur while
generator is operating:
• Excessive voltage is produced.
• No voltage is produced.
IPDM E/R
Used for the power generation voltage variable control system.
Refer to CHG-4, "System Description" .
Revision: January 2012 2011 Maxima
CHG-4
< SYSTEM DESCRIPTION >
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
System Diagram INFOID:0000000006234483
System Description INFOID:0000000006234484
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 generation variable voltage control system, power generation
is performed according to the characteristic of the IC regulator in the generator.
Component Description INFOID:0000000006234485
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: January 2012 2011 Maxima
CHG
CHARGING SYSTEM PRELIMINARY INSPECTION
CHG-5
< DTC/CIRCUIT DIAGNOSIS >
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DTC/CIRCUIT DIAGNOSIS
CHARGING SYSTEM PRELIMINARY INSPECTION
Inspection Procedure INFOID:0000000006234486
1.CHECK BATTERY TERMINALS CONNECTION
Check if battery terminals are clean and tight.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair battery terminals connection.
2.CHECK FUSE
Check for blown fuse and fusible link.
Is the inspection result normal?
YES >> GO TO 3
NO >> Be sure to eliminate cause of malfunction before installing new fuse or fusible link.
3.CHECK GENERATOR GROUND TERMINAL CONNECTION
Check if connector E230 terminal 5 (generator ground harness) is clean and tight.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair connection.
4.CHECK DRIVE BELT TENSION
Check drive belt tension. Refer to CHG-22, "Inspection" .
Is the inspection result normal?
YES >> Inspection End.
NO >> Repair as needed.
Unit Power source (Power supply terminals) Fuse or Fusible Link
Generator
Battery (terminal 3) Fuse 29
Battery (terminal 1) Fusible Link A
Combination meter Ignition switch ON (terminal 2) Fuse 4
Revision: January 2012 2011 Maxima
CHG-6
< DTC/CIRCUIT DIAGNOSIS >
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPER-
ATION INSPECTION
Inspection Procedure INFOID:0000000006234487
Regarding Wiring Diagram information, refer to CHG-11, "Wiring Diagram" .
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-136, "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. The selector lever is in “P” or “N” position and all 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 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-13, "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 GENERATOR AND IPDM E/R
1. Turn ignition switch OFF.
2. Disconnect generator connector and IPDM E/R connector.
“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 %
Revision: January 2012 2011 Maxima
CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
CHG-7
< DTC/CIRCUIT DIAGNOSIS >
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3. Check continuity between generator harness connector F7 (A)
terminal 4 and IPDM E/R harness connector F10 (B) terminal
76.
4. Check continuity between generator harness connector F7 (A)
terminal 4 and ground.
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-35, "Removal and Installation" .
NO >> Repair harness or connector between IPDM E/R and generator.
A B
Continuity
Connector Terminal Connector Terminal
F7 4 F10 76 Yes
A
— Continuity
Connector Terminal
F7 4 Ground No
ALMIA0343ZZ
Revision: January 2012 2011 Maxima
CHG-8
< DTC/CIRCUIT DIAGNOSIS >
B TERMINAL CIRCUIT
B TERMINAL CIRCUIT
Description INFOID:0000000006234488
The terminal “1” (B) circuit supplies power to charge the battery and operate the vehicle’s electrical system.
Diagnosis Procedure INFOID:0000000006234489
Regarding Wiring Diagram information, refer to CHG-11, "Wiring Diagram" .
1.CHECK TERMINAL “1” CONNECTION
1. Turn ignition switch OFF.
2. Check if terminal “1” is clean and tight.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair terminal “1” connection. Confirm repair by performing complete Starting/Charging system
test. Refer to diagnostic station instruction manual.
2.CHECK TERMINAL “1” CIRCUIT
Check voltage between generator connector F6 terminal 1 and
ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Check harness for open between generator and fusible
link.
3.CHECK TERMINAL “1” CONNECTION (VOLTAGE DROP TEST)
1. Start engine, then engine running at idle and warm.
2. Check voltage between battery positive terminal and generator
connector F6 terminal 1.
Is the inspection result normal?
YES >> Terminal “1” circuit is normal. Refer to CHG-2, "Work
Flow" .
NO >> Check harness between battery and generator for high
resistance.
1 - ground Battery voltage
ALMIA0344ZZ
1 - B+ Less than 0.2V
ALMIA0345ZZ
Revision: January 2012 2011 Maxima
CHG
L TERMINAL CIRCUIT
CHG-9
< DTC/CIRCUIT DIAGNOSIS >
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L TERMINAL CIRCUIT
Description INFOID:0000000006234490
The terminal “2” (L) circuit controls the charge warning lamp. The charge warning lamp illuminates when the
ignition switch is set to ON or START. When the generator is providing sufficient voltage with the engine run-
ning, the charge warning lamp will go off. If the charge warning lamp illuminates with the engine running, a
malfunction is indicated.
Diagnosis Procedure INFOID:0000000006234491
Regarding Wiring Diagram information, refer to CHG-11, "Wiring Diagram" .
1.CHECK CHARGE WARNING LAMP CIRCUIT CONNECTION
Check to see if generator connector F7 terminal 2 is clean and tight.
Is the connection secure?
YES >> GO TO 2
NO >> Repair the connection. Confirm repair by performing complete Starting/Charging system test.
Refer to diagnostic station instruction manual.
2.CHECK CHARGE WARNING LAMP CIRCUIT
1. Disconnect generator connector F7.
2. Apply ground to generator harness connector F7 terminal 2 with
the ignition switch in the ON position.
Does it illuminate?
YES >> Check generator function. Refer to CHG-2, "Work Flow" .
NO >> GO TO 3
3.CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Turn ignition switch OFF.
2. Disconnect the generator connector F7.
3. Disconnect the combination meter connector M24.
4. Check continuity between generator harness connector F7 (A)
terminal 2 and combination meter harness connector M24 (B)
terminal 25.
Is continuity present?
YES >> Replace the combination meter. Refer to MWI-119, "Removal and Installation" .
NO >> Repair the harness or connector.
Charge lamp should illuminate
ALMIA0346ZZ
A B
Continuity
Connector Terminal Connector Terminal
F7 2 M24 25 Yes
AWMIA1169ZZ
Revision: January 2012 2011 Maxima
CHG-10
< DTC/CIRCUIT DIAGNOSIS >
S TERMINAL CIRCUIT
S TERMINAL CIRCUIT
Description INFOID:0000000006234492
The output voltage of the generator is controlled by the IC regulator at terminal “3” (S) detecting the input volt-
age. Terminal “3” circuit detects the battery voltage to adjust the generator output voltage with the IC regulator.
Diagnosis Procedure INFOID:0000000006234493
Regarding Wiring Diagram information, refer to CHG-11, "Wiring Diagram" .
1.CHECK VOLTAGE REGULATOR CIRCUIT CONNECTION
Check to see if connector F7 terminal 3 is clean and tight.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair terminal connection. Confirm repair by performing complete Starting/Charging system test.
Refer to diagnostic station instruction manual.
2.CHECK VOLTAGE REGULATOR CIRCUIT
Check voltage between generator harness connector F7 terminal 3
and ground.
Does battery voltage exist?
YES >> Refer to CHG-2, "Work Flow" .
NO >> Check harness for open between generator and fuse.
3 - ground Battery voltage
ALMIA0348ZZ
Revision: January 2012 2011 Maxima
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What's Included?
Lifetime Access
Fast Download Speeds
Offline Viewing
Access Contents & Bookmarks
Full Search Facility
Print one or all pages of your manual
$36.99
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