Nissan Pathfinder. Manual - part 285

CHG-18

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

• Use fully charged battery.

DETAILED FLOW

1.

PRELIMINARY INSPECTION

Perform the preliminary inspection. Refer to 

CHG-20, "Diagnosis Procedure"

.

>> GO TO 2.

2.

STOP POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM

Stop the operation of the power generation voltage variable control in either of the following procedures:

• After selecting “ENGINE” using CONSULT, set the DUTY value of “ALTERNATOR DUTY” to 0 % by select-

ing “ALTERNATOR DUTY” with “Active Test”. Continue “Active Test” until the end of inspection. (When the

DUTY value is 0 or 100 %, the normal power generation is performed according to the characteristic of the

IC regulator of the generator.)

• Turn the ignition switch OFF, and disconnect the battery current sensor connector. [However, DTC (P1550 -

P1554) of the engine might remain. After finishing the inspection, connect the battery current sensor connec-

tor and erase the self-diagnostic results history of the engine using CONSULT.] 

>> GO TO 3.

3.

INSPECTION WITH CHARGE WARNING LAMP (IGNITION SWITCH IS TURNED ON)

When ignition switch is turned ON.
Does the charge warning lamp illuminate?

ALMIA0577GB

CHG

DIAGNOSIS AND REPAIR WORKFLOW

CHG-19

< BASIC INSPECTION >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

YES

>> GO TO 4.

NO

>> GO TO 10.

4.

INSPECTION WITH CHARGE WARNING LAMP (IDLING) 

Start the engine and run it at idle 
Does the charge warning lamp turn OFF?

YES

>> GO TO 5.

NO

>> GO TO 6.

5.

INSPECTION WITH CHARGE WARNING LAMP (ENGINE AT 2,500 RPM)

Increase and maintain the engine speed at 2,500 rpm.
Does the charge warning lamp illuminate?

YES

>> GO TO 8.

NO

>> Inspection End.

6.

“L” TERMINAL CIRCUIT (SHORT) INSPECTION

Check terminal “L” circuit for (short). Refer to 

CHG-24, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair as needed.

7.

 “S” TERMINAL CIRCUIT INSPECTION

Check terminal “S” circuit. Refer to 

CHG-27, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair as needed.

8.

MEASURE “B” TERMINAL VOLTAGE

Start engine. With engine running at 2,500 rpm, measure “B” terminal voltage. 
What voltage does the measurement result show?

Less than 13.0 V>>GO TO 9.

More than 16.0 V>>Replace generator. Refer to 

CHG-29, "Removal and Installation"

. 

9.

“B” TERMINAL CIRCUIT INSPECTION 

Check “B” terminal circuit. Refer to 

CHG-23, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace generator. Refer to 

CHG-29, "Removal and Installation"

.

NO

>> Repair as needed.

10.

INSPECTION WITH CHARGE WARNING LAMP (IGNITION SWITCH IS ON) 

1. Disconnect generator connector and apply ground to “L” terminal. 

2. Turn the ignition switch ON. 
Does the charge warning lamp illuminate?

YES

>> Replace generator. Refer to 

CHG-29, "Removal and Installation"

.

NO

>> GO TO 11.

11.

CHECK “L” TERMINAL CIRCUIT (OPEN)

Check “L” terminal circuit (OPEN). Refer to 

CHG-24, "Diagnosis Procedure"

.

>> Repair as needed.

CHG-20

< DTC/CIRCUIT DIAGNOSIS >

CHARGING SYSTEM PRELIMINARY INSPECTION

DTC/CIRCUIT DIAGNOSIS

CHARGING SYSTEM PRELIMINARY INSPECTION

Diagnosis Procedure

INFOID:0000000009175268

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 terminal connection. Confirm repair by performing complete Charging system test

using EXP-800 NI or GR8-1200 NI (if available). Refer to the applicable Instruction Manual for

proper testing procedures. 

2.

CHECK FUSE

Check for blown fuse and fusible link.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the blown fuse or fusible link after repairing the affected circuit.

3.

CHECK GENERATOR GROUND TERMINAL CONNECTION

Check if connector F7 terminals 5 and 6 are clean.
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair connection.

4.

CHECK DRIVE BELT TENSION

Check drive belt tension. Refer to 

CHG-29, "Removal and Installation"

.

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 57

Battery (terminal 1)

Fusible Link A

Combination meter

Ignition switch ON (terminal 2)

Fuse 31

CHG

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION 

INSPECTION

CHG-21

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPER-
ATION INSPECTION

Diagnosis Procedure

INFOID:0000000009175269

Regarding Wiring Diagram information. Refer to 

CHG-9, "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)

Perform ECM self-diagnosis with CONSULT. Refer to 

EC-61, "CONSULT 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 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 “DUTY” is set to 40.0 %.

4. Check the value of “BATTERY VOLT” monitor when DUTY value of “DUTY” is set to 80.0%.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 3.

3.

CHECK IPDM E/R (CONSULT)

Perform IPDM E/R self-diagnosis with CONSULT. Refer to 

PCS-9, "CONSULT Function (IPDM E/R)"

.

Is the inspection result normal?

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.

3. Check continuity between generator harness connector and IPDM E/R harness 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 %

Generator IPDM 

E/R

Continuity

Connector

Terminal

Connector

Terminal

F7

4

F24

71

Yes