Nissan Murano. Instruction — part 264
CHG-12
< SYSTEM DESCRIPTION >
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
System Diagram
INFOID:0000000009722543
System Description
INFOID:0000000009722544
By performing the power generation voltage variable control, the engine load due to the power generation of
the alternator is reduced and fuel consumption is decreased.
NOTE:
When any malfunction is detected in the power generation voltage variable control system, the power genera-
tion is performed according to the characteristic of the IC voltage regulator of the alternator.
Component Parts Location
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JMMIA1072GB
1.
ECM
2.
IPDM E/R
3.
Battery current sensor
4.
Alternator
A.
Engine room dash panel (LH)
B.
Battery
C.
Cylinder block left side
JPLIA0888ZZ
CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
CHG-13
< SYSTEM DESCRIPTION >
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
Component Description
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Component part
Description
Battery current sensor
Battery current sensor is installed to the battery cable at the neg-
ative terminal, and it detects the charging/discharging current of
the battery and sends the voltage signal to ECM according to the
current value.
ECM
Battery current sensor detects the charging/discharging current of
the battery. ECM judges the battery condition based on this signal.
ECM judges whether to perform the power generation voltage
variable control according to the battery condition.
When performing the power generation voltage variable control,
ECM calculates the target power generation voltage according to
the battery condition and sends the calculated value as the power
generation command value to IPDM E/R.
IPDM E/R
IPDM E/R converts the received power generation command val-
ue into the power generation command signal (PWM signal) and
sends it to the IC voltage regulator.
Alternator (IC voltage regulator)
IC voltage regulator controls the power generation voltage by the
target power generation voltage based on the received power gen-
eration command signal.
When there is no power generation command signal, the alterna-
tor performs the normal power generation according to the char-
acteristic of the IC voltage regulator.
CHG-14
< DTC/CIRCUIT DIAGNOSIS >
B TERMINAL CIRCUIT
DTC/CIRCUIT DIAGNOSIS
B TERMINAL CIRCUIT
Description
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“B” terminal circuit supplies power to charge the battery and to operate the vehicle’s electrical system.
Diagnosis Procedure
INFOID:0000000009722548
1.
CHECK “B” TERMINAL CONNECTION
1.
Turn ignition switch OFF.
2.
Check if “B” terminal is clean and tight.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair “B” 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 Instruction for
proper testing procedures.
2.
CHECK “B” TERMINAL CIRCUIT
Check voltage between alternator “B” terminal and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check harness for open between alternator and fusible link.
3.
CHECK “B” TERMINAL CONNECTION (VOLTAGE DROP TEST)
1.
Start engine, then engine running at idle and warm.
2.
Check voltage between battery positive terminal and alternator “B” terminal.
Is the inspection result normal?
YES
>> “B” terminal circuit is normal. Refer to
CHG-3, "Work Flow (With EXP-800 NI or GR8-1200 NI)"
or
CHG-7, "Work Flow (Without EXP-800 NI or GR8-1200 NI)"
.
NO
>> Check harness between battery and alternator for poor continuity.
Terminals
Voltage (Approx.)
(+)
(–)
Alternator “B” terminal
Terminal
F59
1
Ground
Battery voltage
Terminals
Voltage (Approx.)
(+)
(–)
Alternator “B” terminal
Terminal
Battery positive terminal
F59
1
Less than 0.2 V
CHG
L TERMINAL CIRCUIT (OPEN)
CHG-15
< DTC/CIRCUIT DIAGNOSIS >
C
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K
L
B
A
O
P
N
L TERMINAL CIRCUIT (OPEN)
Description
INFOID:0000000009722549
The “L” terminal circuit controls the charge warning lamp. The charge warning lamp illuminates when the igni-
tion switch is set to ON or START. When the alternator is providing sufficient voltage with the engine running,
the charge warning lamp will go off. If the charge warning lamp illuminates with the engine running, a malfunc-
tion is indicated.
Diagnosis Procedure
INFOID:0000000009722550
1.
CHECK “L” TERMINAL CONNECTION
1.
Turn ignition switch OFF.
2.
Check if “L” terminal is clean and tight.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair “L” 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 Instruction for
proper testing procedures.
2.
CHECK “L” TERMINAL CIRCUIT (OPEN)
1.
Disconnect alternator connector.
2.
Apply ground to alternator harness connector terminal.
3.
Check condition of the charge warning lamp with the ignition switch in the ON position.
Does it illuminate?
YES
>> “L” terminal circuit is normal. Refer to
CHG-3, "Work Flow (With EXP-800 NI or GR8-1200 NI)"
or
CHG-7, "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 alternator harness connector and combination meter harness connector.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair the harness or connector.
4.
CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
Check continuity between combination meter harness connector and fuse block.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair the harness.
Alternator harness connector
Terminal
Ground
Condition
Ignition switch position
Charge warning lamp
F60
3
ON
illuminate
Alternator harness connector
Combination meter harness connector
Continuity
Connector No.
Terminal No.
Connector No.
Terminal No.
F60
3
M34
25
Existed
Combination meter harness connector
Fuse block
Continuity
Connector No.
Terminal No.
Connector No.
Terminal No.
M34
2
M3
12C
Existed
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