Nissan Pathfinder (2010 year). Manual - part 123

CHG-6

< FUNCTION DIAGNOSIS >

CHARGING SYSTEM

FUNCTION DIAGNOSIS

CHARGING SYSTEM

System Diagram

INFOID:0000000005255205

System Description

INFOID:0000000005255206

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

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ALMIA0207GB

Component part

Description

Generator

Terminal “1”

Refer to 

CHG-11, "Description"

.

Terminal “2”

Refer to 

CHG-12, "Description"

.

Terminal “3”

Refer to 

CHG-13, "Description"

.

Terminal “4”

Used for the power generation voltage variable control system. 
Refer to 

CHG-7, "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-7, "System Description"

.

2010 Pathfinder

CHG

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM

CHG-7

< FUNCTION DIAGNOSIS >

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POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM

System Diagram

INFOID:0000000005255208

System Description

INFOID:0000000005255209

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:0000000005255210

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.

2010 Pathfinder

CHG-8

< COMPONENT DIAGNOSIS >

CHARGING SYSTEM PRELIMINARY INSPECTION

COMPONENT DIAGNOSIS

CHARGING SYSTEM PRELIMINARY INSPECTION

Inspection Procedure

INFOID:0000000005255211

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

Verify connector E209 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 

EM-14, "Checking Drive Belts"

 (VQ40DE) or 

EM-149, "Checking Drive

Belts"

 (VK56DE).

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 30

Battery (terminal 1)

Fusible Link 

A

Combination meter

Ignition switch ON (terminal 2)

Fuse 14

2010 Pathfinder

CHG

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION 

INSPECTION

CHG-9

< COMPONENT DIAGNOSIS >

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POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPER-
ATION INSPECTION

Inspection Procedure

INFOID:0000000005255212

Regarding Wiring Diagram information, refer to 

CHG-14, "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-79, "CONSULT-III Function (ENGINE)"

(VQ40DE) or 

EC-557, "CONSULT-III Function (ENGINE)"

 (VK56DE).

Is the inspection result normal?

YES

>> GO TO 2

NO

>> 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 inspection result normal?

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)"

.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Check applicable parts, and repair or replace corresponding parts.

4.

CHECK HARNESS BETWEEN GENERATOR AND IPDM E/R

“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 %

2010 Pathfinder

CHG-10

< COMPONENT DIAGNOSIS >

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION 

INSPECTION

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.

4. Check continuity between generator harness connector E122

(A) terminal 4 and ground.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-33, "Removal and Installation of IPDM E/R"

.

NO

>> Repair harness or connector between IPDM E/R and generator. 

A

B

Continuity

Connector

Terminal

Connector

Terminal

E205

4

E122

37

Yes

A

—

Continuity

Connector

Terminal

E205

4

Ground

No

ALMIA0196ZZ

2010 Pathfinder

CHG

B TERMINAL CIRCUIT

CHG-11

< COMPONENT DIAGNOSIS >

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B TERMINAL CIRCUIT

Description

INFOID:0000000005255213

The terminal “1” (B) circuit supplies power to charge the battery and operate the vehicles electrical system.

Diagnosis Procedure

INFOID:0000000005255214

Regarding Wiring Diagram information, refer to 

CHG-14, "Wiring Diagram"

.

1.

CHECK TERMINAL “1” CONNECTION

1. Turn ignition switch OFF.

2. Verify 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 E206 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 E206 terminal 1.

Is the inspection result normal?

YES

>> Terminal “1” circuit is normal. Refer to 

CHG-5, "Work

Flow"

.

NO

>> Check harness between battery and generator for high resistance.

(+)

(-)

Voltage

Connector

Terminal

E206

1

Ground

Battery voltage

ALMIA0197ZZ

(+)

(-)

Voltage

Connector

Terminal

E206

1

Battery positive terminal

Less than 0.2V

ALMIA0198ZZ

2010 Pathfinder

CHG-12

< COMPONENT DIAGNOSIS >

L TERMINAL CIRCUIT

L TERMINAL CIRCUIT

Description

INFOID:0000000005255215

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:0000000005255216

Regarding Wiring Diagram information, refer to 

CHG-14, "Wiring Diagram"

.

1.

CHECK CHARGE WARNING LAMP CIRCUIT CONNECTION

Verify generator connector E205 terminal 2 is clean and tight. 
Is the inspection result normal?

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 E205.

2. Apply ground to generator harness connector E205 terminal 2

with the ignition switch in the ON position.

Is the inspection result normal?

YES

>> Check generator function. Refer to 

CHG-5, "Work Flow"

.

NO

>> GO TO 3

3.

CHECK HARNESS CONTINUITY

1. Turn ignition switch OFF.

2. Disconnect the generator connector E205 and combination meter connector M23.

3. Check continuity between generator harness connector E205 terminal 2 and combination meter harness

connector M24 terminal 2.

4. Check continuity between generator harness connector E205 terminal 2 and ground.

Is the inspection result normal?

YES

>> Replace the combination meter. Refer to  

MWI-96, "Removal and Installation"

.

NO

>> Repair the harness or connector.

Charge lamp should illuminate

ALMIA0200ZZ

Terminal

Terminal

Continuity

Connector

Terminal

Connector

Terminal

E205

2

M24

2

Yes

Terminal

—

Continuity

Connector

Terminal

E205

2

Ground

No

2010 Pathfinder

CHG

S TERMINAL CIRCUIT

CHG-13

< COMPONENT DIAGNOSIS >

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S TERMINAL CIRCUIT

Description

INFOID:0000000005255217

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:0000000005255218

Regarding Wiring Diagram information, refer to 

CHG-14, "Wiring Diagram"

.

1.

CHECK VOLTAGE REGULATOR CIRCUIT CONNECTION

Check to see if connector E205 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 E205 terminal

3 and ground.

Is the inspection result normal?

YES

>> Refer to 

CHG-5, "Work Flow"

.

NO

>> Check harness for open between generator and fuse.

3 - ground

Battery voltage

ALMIA0201ZZ

2010 Pathfinder