Murano Cross Cabriolet Z51 (2012 year). Manual — part 24
CHG
SYSTEM
CHG-9
< SYSTEM DESCRIPTION >
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scription
INFOID:0000000007565934
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.
Revision: 2013 February
2012 Murano CrossCabriolet
CHG-10
< WIRING DIAGRAM >
CHARGING SYSTEM
WIRING DIAGRAM
CHARGING SYSTEM
Wiring Diagram
INFOID:0000000007565935
JCMWA8072GB
Revision: 2013 February
2012 Murano CrossCabriolet
CHG
DIAGNOSIS AND REPAIR WORK FLOW
CHG-11
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow (With EXP-800 NI or GR8-1200 NI)
INFOID:0000000009347692
CHARGING SYSTEM DIAGNOSIS WITH EXP-800 NI OR GR8-1200 NI
To test the charging system, use the following special service tools:
• EXP-800 NI Battery and electrical diagnostic analyzer
• GR8-1200 NI Multitasking battery and electrical diagnostic station
NOTE:
Refer to the applicable Instruction Manual for proper charging system diagnosis procedures.
Revision: 2013 February
2012 Murano CrossCabriolet
CHG-12
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORK FLOW
OVERALL SEQUENCE
DETAILED FLOW
NOTE:
To ensure a complete and thorough diagnosis, the battery, starter and alternator test segments must be done
as a set from start to finish.
1.
PRELIMINARY INSPECTION
Perform the preliminary inspection. Refer to
CHG-18, "Inspection Procedure"
.
JMMIA1147GB
Revision: 2013 February
2012 Murano CrossCabriolet
CHG
DIAGNOSIS AND REPAIR WORK FLOW
CHG-13
< BASIC INSPECTION >
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>> 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” of “SELECT SYSTEM” using CONSULT, set the DUTY value of “ALTERNATOR
DUTY” to 0 % by selecting “ALTERNATOR DUTY” of “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 voltage regulator of the alternator.)
• 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-diagnosis results history of the engine using CONSULT.]
>> GO TO 3.
3.
DIAGNOSIS WITH EXP-800 NI OR GR8-1200 NI
Perform the charging system test using Multitasking battery and electrical diagnostic station GR8-1200 NI or
Battery and electrical diagnostic analyzer EXP-800 NI. Refer to the applicable Instruction Manual for proper
testing procedures.
Test result
NO PROBLEMS>>Charging system is normal and will also show “DIODE RIPPLE” test result.
NO VOLTAGE>>GO TO 4.
LOW VOLTAGE>>GO TO 12.
HIGH VOLTAGE>>GO TO 14.
EXCESSIVE RIPPLE, OPEN PHASE, OPEN DIODE or SHORTED DIODE>>Replace the alternator. Per-
form “DIODE RIPPLE” test again using Multitasking battery and electrical diagnostic station GR8-
1200 NI or Battery and electrical diagnostic analyzer EXP-800 NI to confirm repair.
4.
INSPECTION WITH CHARGE WARNING LAMP (IGNITION SWITCH IS ON)
Turn the ignition switch ON.
Does the charge warning lamp illuminate?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
“L” TERMINAL CIRCUIT (OPEN) INSPECTION
Check “L” terminal circuit (open). Refer to
Is the “L” terminal circuit normal?
YES
>> Replace alternator. Refer to
CHG-28, "Removal and Installation"
NO
>> Repair as needed.
6.
INSPECTION WITH CHARGE WARNING LAMP (IDLING)
Start the engine and run it at idle.
Does the charge warning lamp turn OFF?
YES
>> GO TO 9.
NO
>> GO TO 7.
7.
“L” TERMINAL CIRCUIT (SHORT) INSPECTION
Check “L” terminal circuit (short). Refer to
Is the “L” terminal circuit normal?
YES
>> GO TO 8.
NO
>> Repair as needed.
8.
“S” TERMINAL CIRCUIT INSPECTION
Check “S” terminal circuit. Refer to
Is the “S” terminal circuit normal?
YES
>> GO TO 10.
NO
>> Repair as needed.
Revision: 2013 February
2012 Murano CrossCabriolet
CHG-14
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORK FLOW
9.
INSPECTION WITH CHARGE WARNING LAMP (ENGINE AT 3,000 RPM)
Increase and maintain the engine speed at 3,000 rpm.
Does the charge warning lamp remain off?
YES
>> GO TO 11.
NO
>> GO TO 10.
10.
INSPECTION OF ALTERNATOR PULLEY
Check alternator pulley. Refer to
Is alternator pulley normal?
YES
>> Replace alternator. Refer to
CHG-28, "Removal and Installation"
NO
>> Repair as needed.
11.
“B” TERMINAL CIRCUIT INSPECTION
Check “B” terminal circuit. Refer to
Is “B” terminal circuit normal?
YES
>> Replace alternator. Refer to
CHG-28, "Removal and Installation"
NO
>> Repair as needed.
12.
“B” TERMINAL CIRCUIT INSPECTION
Check “B” terminal circuit. Refer to
Is “B” terminal circuit normal?
YES
>> GO TO 13.
NO
>> Repair as needed.
13.
INSPECTION OF ALTERNATOR PULLEY
Check alternator pulley. Refer to
Is alternator pulley normal?
YES
>> Replace alternator. Refer to
CHG-28, "Removal and Installation"
NO
>> Repair as needed.
14.
“S” TERMINAL CIRCUIT INSPECTION
Check “S” terminal circuit. Refer to
Is the “S” terminal circuit normal?
YES
>> Replace alternator. Refer to
CHG-28, "Removal and Installation"
NO
>> Repair as needed.
Revision: 2013 February
2012 Murano CrossCabriolet
CHG
DIAGNOSIS AND REPAIR WORK FLOW
CHG-15
< BASIC INSPECTION >
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Work Flow (Without EXP-800 NI or GR8-1200 NI)
INFOID:0000000009347693
OVERALL SEQUENCE
DETAILED FLOW
1.
PRELIMINARY INSPECTION
Perform the preliminary inspection. Refer to
CHG-18, "Inspection Procedure"
.
JMMIA1148GB
Revision: 2013 February
2012 Murano CrossCabriolet
CHG-16
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORK FLOW
>> 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” of “SELECT SYSTEM” using CONSULT, set the DUTY value of “ALTERNATOR
DUTY” to 0 % by selecting “ALTERNATOR DUTY” of “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 alternator.)
• 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?
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 “L” terminal circuit (short). Refer to
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair as needed.
7.
“S” TERMINAL CIRCUIT INSPECTION
Check “S” terminal circuit. Refer to
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 alternator. Refer to
CHG-28, "Removal and Installation"
.
9.
“B” TERMINAL CIRCUIT INSPECTION
Check “B” terminal circuit. Refer to
Is the inspection result normal?
YES
>> Replace alternator. Refer to
CHG-28, "Removal and Installation"
NO
>> Repair as needed.
10.
INSPECTION WITH CHARGE WARNING LAMP (IGNITION SWITCH IS ON)
Revision: 2013 February
2012 Murano CrossCabriolet
CHG
DIAGNOSIS AND REPAIR WORK FLOW
CHG-17
< BASIC INSPECTION >
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1.
Disconnect alternator connector and apply ground to “L” terminal.
2.
Turn the ignition switch ON.
Does the charge warning lamp illuminate?
YES
>> Replace alternator. Refer to
CHG-28, "Removal and Installation"
NO
>> GO TO 11.
11.
CHECK “L” TERMINAL CIRCUIT (OPEN)
Check “L” terminal circuit (open). Refer to
>> Repair as needed.
Revision: 2013 February
2012 Murano CrossCabriolet
CHG-18
< BASIC INSPECTION >
CHARGING SYSTEM PRELIMINARY INSPECTION
CHARGING SYSTEM PRELIMINARY INSPECTION
Inspection Procedure
INFOID:0000000007565937
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.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Be sure to eliminate the cause of malfunction before installing new fuse.
3.
CHECK “E” TERMINAL CONNECTION
Check if “E” terminal (alternator ground harness) is clean and tight.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair “E” terminal connection.
4.
CHECK DRIVE BELT TENSION
Check drive belt tension. Refer to
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair as needed.
Unit
Power source (Power supply terminals)
Fuse No.
Alternator
Battery (“S” terminal)
38
Combination meter
Ignition switch ON (“L” terminal)
4
Revision: 2013 February
2012 Murano CrossCabriolet
CHG
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
CHG-19
< BASIC INSPECTION >
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POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPER-
ATION INSPECTION
Inspection Procedure
INFOID:0000000007565938
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
.
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” at “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 the specification?
YES
>> INSPECTION END
NO
>> GO TO 3.
3.
CHECK IPDM E/R (CONSULT)
Perform IPDM E/R self-diagnosis with CONSULT. Refer to
PCS-12, "CONSULT 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 ALTERNATOR AND IPDM E/R
1.
Turn ignition switch OFF.
2.
Disconnect alternator connector and IPDM E/R connector.
3.
Check continuity between alternator harness connector and IPDM E/R harness connector.
4.
Check continuity between alternator harness connector and ground.
“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 %
Alternator harness connector
IPDM E/R harness connector
Continuity
Connector
Terminal
Connector
Terminal
F60
5
F12
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Existed
Revision: 2013 February
2012 Murano CrossCabriolet
CHG-20
< BASIC INSPECTION >
POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM OPERATION
INSPECTION
Is the inspection result normal?
YES
>> Replace IPDM E/R.
NO
>> Repair harness or connector between IPDM E/R and alternator.
Alternator harness connector
Ground
Continuity
Connector
Terminal
F60
5
Not existed
Revision: 2013 February
2012 Murano CrossCabriolet
CHG
B TERMINAL CIRCUIT
CHG-21
< DTC/CIRCUIT DIAGNOSIS >
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DTC/CIRCUIT DIAGNOSIS
B TERMINAL CIRCUIT
Description
INFOID:0000000007565939
“B” terminal circuit supplies power to charge the battery and to operate the vehicle’s electrical system.
Diagnosis Procedure
INFOID:0000000007565940
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 Manual 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-11, "Work Flow (With EXP-800 NI or GR8-1200 NI)"
CHG-15, "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
Revision: 2013 February
2012 Murano CrossCabriolet
CHG-22
< DTC/CIRCUIT DIAGNOSIS >
L TERMINAL CIRCUIT (OPEN)
L TERMINAL CIRCUIT (OPEN)
Description
INFOID:0000000007565941
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:0000000007565942
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 Manual 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-11, "Work Flow (With EXP-800 NI or GR8-1200 NI)"
CHG-15, "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
illuminates
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
Revision: 2013 February
2012 Murano CrossCabriolet
CHG
L TERMINAL CIRCUIT (OPEN)
CHG-23
< DTC/CIRCUIT DIAGNOSIS >
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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 combination meter.
NO
>> Inspect the power supply circuit. Refer to
PG-28, "Wiring Diagram - IGNITION POWER SUPPLY -
Terminals
Condition
Voltage (Approx.)
(+)
(–)
Combination meter
harness connector
Terminal
M34
2
Ground
When the ignition switch is in
ON position
Battery voltage
Revision: 2013 February
2012 Murano CrossCabriolet
CHG-24
< DTC/CIRCUIT DIAGNOSIS >
L TERMINAL CIRCUIT (SHORT)
L TERMINAL CIRCUIT (SHORT)
Description
INFOID:0000000007565943
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:0000000007565944
1.
CHECK “L” TERMINAL CIRCUIT (SHORT)
1.
Turn ignition switch OFF.
2.
Disconnect alternator connector.
3.
Turn ignition switch ON.
Does charge warning lamp illuminate?
YES
>> GO TO 2.
NO
>> Refer to
CHG-11, "Work Flow (With EXP-800 NI or GR8-1200 NI)"
out EXP-800 NI or GR8-1200 NI)"
.
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 combination meter harness connector and ground.
Is the inspection result normal?
YES
>> Replace combination meter.
NO
>> Repair the harness.
Combination meter harness connector
Ground
Continuity
Connector No.
Terminal No.
M34
25
Not existed
Revision: 2013 February
2012 Murano CrossCabriolet
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