Nissan Pathfinder (2012 year). Instruction — part 123
CHG-12
< SYSTEM DESCRIPTION >
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
System Diagram
INFOID:0000000007355048
System Description
INFOID:0000000007355049
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:0000000007355050
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.
August 2012
2012 Pathfinder
CHG
CHARGING SYSTEM PRELIMINARY INSPECTION
CHG-13
< DTC/CIRCUIT DIAGNOSIS >
C
D
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F
G
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K
L
B
A
O
P
N
DTC/CIRCUIT DIAGNOSIS
CHARGING SYSTEM PRELIMINARY INSPECTION
Diagnosis Procedure
INFOID:0000000007355051
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. Confirm repair by performing complete Charging system test
using EXP-800 NI or GR8-1200 NI (if available). Refer to applicable Instruction Instruction for proper
testing procedures.
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
(VQ40DE) or
(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 16)
Fuse 14
August 2012
2012 Pathfinder
CHG-14
< DTC/CIRCUIT DIAGNOSIS >
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPER-
ATION INSPECTION
Diagnosis Procedure
INFOID:0000000007355052
Regarding Wiring Diagram information, refer to
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
(VQ40DE) or
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 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)
Perform IPDM E/R self-diagnosis with CONSULT. Refer to
PCS-11, "CONSULT 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 %
August 2012
2012 Pathfinder
CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
CHG-15
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
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 E205
(A) terminal 4 and ground.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-29, "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
ALMIA0196ZZ
A
—
Continuity
Connector
Terminal
E205
4
Ground
No
August 2012
2012 Pathfinder
CHG-16
< DTC/CIRCUIT DIAGNOSIS >
B TERMINAL CIRCUIT
B TERMINAL CIRCUIT
Description
INFOID:0000000007355053
The terminal “1” (B) circuit supplies power to charge the battery and operate the vehicles electrical system.
Diagnosis Procedure
INFOID:0000000007355054
Regarding Wiring Diagram information, refer to
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 Charging system test
using EXP-800 NI or GR8-1200 NI (if available). Refer to applicable Instruction Instruction for proper
testing procedures.
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
Flow (With EXP-800 NI or GR8-1200 NI)"
"Work Flow (Without EXP-800 NI or GR8-1200 NI)"
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
August 2012
2012 Pathfinder
CHG
L TERMINAL CIRCUIT (OPEN)
CHG-17
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
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J
K
L
B
A
O
P
N
L TERMINAL CIRCUIT (OPEN)
Description
INFOID:0000000008802447
The “2” (L) terminal circuit controls the charge warning lamp. The charge warning lamp turns ON 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 turns OFF. If the charge warning lamp illuminates with the engine running, a
malfunction is indicated.
Diagnosis Procedure
INFOID:0000000008802448
Regarding Wiring Diagram information. Refer to
1.
CHECK “2” TERMINAL CONNECTION
1. Turn ignition switch OFF.
2. Check if “2” terminal is clean and tight.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair “2” terminal connection. Confirm repair by performing complete Charging system test
using EXP-800 NI or GR8-1200 NI (if available). Refer to applicable Instruction Instruction for proper
testing procedures.
2.
CHECK “2” TERMINAL CIRCUIT (OPEN)
1. Disconnect the generator connector.
2. Apply ground to generator harness connector terminal.
3. Check condition of the charge warning lamp with the ignition switch in the ON position.
Does it illuminate?
YES
>> “2” terminal circuit is normal. Refer to
CHG-5, "Work Flow (With EXP-800 NI or GR8-1200 NI)"
or
CHG-8, "Work Flow (Without EXP-800 NI or GR8-1200 NI)"
.
NO
>> GO TO 3.
3.
CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
1. Disconnect the battery cable from the negative terminal.
2. Disconnect the combination meter connector.
3. Check continuity between generator harness connector and combination meter harness connector.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace the harness or connectors.
4.
CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
Check continuity between combination meter harness connector and fuse block (J/B).
Generator
Ground
Condition
Connector
Terminal
Ignition switch position
Charge warning lamp
E205
2
ON
Illuminate
Generator
Combination meter
Continuity
Connector
Terminal
Connector
Terminal
E205
2
M24
2
Yes
Combination meter
Fuse box (J/B)
Continuity
Connector
Terminal Connector Terminal
M24
16
M4
5P
Yes
August 2012
2012 Pathfinder
CHG-18
< DTC/CIRCUIT DIAGNOSIS >
L TERMINAL CIRCUIT (OPEN)
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace the harness or connectors.
5.
CHECK POWER SUPPLY CIRCUIT
1. Connect the battery cable to the negative terminal.
2. Check voltage between combination meter harness connector and ground.
Is the inspection result normal?
YES
>> Replace the combination meter. Refer to
MWI-89, "Removal and Installation"
.
NO
>> Repair or replace the harness or connectors.
(+)
(-)
Condition
Voltage
(Approx.)
Combination meter
Connector
Terminal
M24
2
Ground
When the ignition
switch is in ON position
Battery voltage
August 2012
2012 Pathfinder
CHG
L TERMINAL CIRCUIT (SHORT)
CHG-19
< DTC/CIRCUIT DIAGNOSIS >
C
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H
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J
K
L
B
A
O
P
N
L TERMINAL CIRCUIT (SHORT)
Description
INFOID:0000000008802449
The terminal “2” (L) circuit controls the charge warning lamp. The charge warning lamp turns ON 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 turns off. If the charge warning lamp illuminates with the engine running, a mal-
function is indicated.
Diagnosis Procedure
INFOID:0000000008802450
Regarding Wiring Diagram information, refer to
1.
CHECK “2” TERMINAL CIRCUIT (SHORT)
1. Turn ignition switch OFF.
2. Disconnect generator connector.
3. Turn ignition switch ON.
Does charge warning lamp illuminate?
YES
>> GO TO 2.
NO
>> Refer to
CHG-5, "Work Flow (With EXP-800 NI or GR8-1200 NI)"
or
.
2.
CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect combination meter connector.
4. Check continuity between the combination meter harness connector and ground.
Is the inspection result normal?
YES
>> Replace the combination meter. Refer to
MWI-89, "Removal and Installation"
.
NO
>> Repair or replace the harness or connectors.
Combination meter
Ground
Continuity
Connector
Terminal
M24
2
No
August 2012
2012 Pathfinder
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