Nissan Frontier D40. Manual — part 174
CHG
CHARGING SYSTEM
CHG-5
< FUNCTION DIAGNOSIS >
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FUNCTION DIAGNOSIS
CHARGING SYSTEM
System Diagram
INFOID:0000000005272436
System Description
INFOID:0000000005272437
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:0000000005272438
ALMIA0207GB
Component part
Description
Generator
Terminal “1”
Refer to
.
Terminal “2”
Refer to
.
Terminal “3”
Terminal “4”
Used for the power generation voltage variable control system.
Refer to
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-6
< FUNCTION DIAGNOSIS >
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
System Diagram
INFOID:0000000005272439
System Description
INFOID:0000000005272440
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:0000000005272441
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.
CHG
CHARGING SYSTEM PRELIMINARY INSPECTION
CHG-7
< COMPONENT DIAGNOSIS >
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COMPONENT DIAGNOSIS
CHARGING SYSTEM PRELIMINARY INSPECTION
Inspection Procedure
INFOID:0000000005272442
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
(VQ40DE).
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
CHG-8
< COMPONENT DIAGNOSIS >
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPER-
ATION INSPECTION
Inspection Procedure
INFOID:0000000005272443
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-III)
Perform ECM self-diagnosis with CONSULT-III. Refer to
EC-69, "CONSULT-III Function (ENGINE)"
EC-528, "CONSULT-III Function (ENGINE)"
(VQ40DE).
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 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-15, "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
“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 %
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