Nissan Murano Z51 (2008 year). Manual — part 224
B2634, B2635 AIR MIX DOOR MOTOR (PASSENGER SIDE)
HAC-59
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
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Diagnosis Procedure
INFOID:0000000003441588
1.
CHECK POWER SUPPLY FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)
Check voltage between air mix door motor (passenger side) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair the harnesses or connectors.
2.
CHECK SIGNAL FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)
Check the output waveform (LAN signal) between air mix door motor (passenger side) harness connector and
ground using an oscilloscope.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair the harnesses or connectors.
3.
CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect air mix door motor (passenger side) connector.
3.
Check continuity between air mix door motor (passenger side) harness connector and ground.
Is the inspection result normal?
YES
>> Replace air mix door motor (passenger side).
NO
>> Repair harness or connector.
(+)
(
−
)
Voltage
Air mix door motor (passenger side)
—
Connector
Terminal
M307
1
Ground
Battery voltage
(+)
(
−
)
Voltage
Air mix door motor (passenger side)
—
Connector
Terminal
M307
3
Ground
SJIA1453J
Air mix door motor (passenger side)
—
Continuity
Connector
Terminal
M307
2
Ground
Existed
Revision: 2008 October
2009 Murano
HAC-60
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR
B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR
Description
INFOID:0000000003073050
COMPONENT DESCRIPTION
Mode Door Motor
• The mode door motor (1) are attached to the heater & cooling unit
assembly.
• It rotates so that air is discharged from the outlet set by the A/C
auto amp. Motor rotation is conveyed to a link which activates the
mode door.
DTC Logic
INFOID:0000000003441610
DTC DETECTION LOGIC
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
DTC CONFIRMATION PROCEDURE
1.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1.
Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2.
Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
Is DTC No.“ B2636 ”, “ B2637 ”, “B2638 ”, “B2639 ”, “B2654 ” or “B2655 ” displayed?
YES
>> Perform trouble diagnosis for the mode door motor. Refer to
NO
>> GO TO 2.
2.
FUNCTION INSPECTION
1.
Press MODE switch and DEF switch.
2.
Each position indicator should change shape.
:
Vehicle front
JPIIA0513ZZ
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
B2636
DR VENT DOOR FAIL
When the malfunctioning door position is
detected at VENT position
• Mode door motor (PBR internal
circuit is open or shorted)
• A/C auto amp.
• Harness and connector (LAN
communication line is open or
shorted)
B2637
DR B/L DOOR FAIL
When the malfunctioning door position is
detected at B/L position
B2638
DR D/F1 DOOR FAIL
When the malfunctioning door position is
detected at FOOT position
B2639
DR DEF DOOR FAIL
When the malfunctioning door position is
detected at DEF position
B2654
D/F2 DOOR FAIL
When the malfunctioning door position is
detected at D/F position
B2655
B/L2 DOOR FAIL
When the malfunctioning door position is
detected at B/L2 position
Revision: 2008 October
2009 Murano
B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR
HAC-61
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
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3.
Confirm that air discharge comes out according to the air distribution table at below. Refer to
.
NOTE:
Confirm that the compressor clutch is engaged (Sound or visual inspection) and intake door position is at FRE
when DEF (
) or D/F (
) is selected.
Does it operate normally?
YES
>> INSPECTION END
NO
>> Check mode door motor installation, and repair or replace the malfunctioning parts.
Diagnosis Procedure
INFOID:0000000003073052
1.
CHECK POWER SUPPLY FOR MODE DOOR MOTOR
Check voltage between mode door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK SIGNAL FOR MODE DOOR MOTOR
Confirm A/C LAN signal between mode door motor harness connector and ground using an oscilloscope.
JPIIA0509GB
JPIIA0510GB
(+)
(
−
)
Voltage
Mode door motor
—
Connector
Terminal
M310
1
Ground
Battery voltage
Revision: 2008 October
2009 Murano
HAC-62
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
B2636, B2637, B2638, B2639, B2654, B2655 MODE DOOR MOTOR
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK MODE DOOR MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect mode door motor connector.
3.
Check continuity between mode door motor harness connector and ground.
Is the inspection result normal?
YES
>> Replace mode door motor.
NO
>> Repair harness or connector.
(+)
(
−
)
Voltage
Mode door motor
—
Connector
Terminal
M310
3
Ground
SJIA1453J
Mode door motor
—
Continuity
Connector
Terminal
M310
2
Ground
Existed
Revision: 2008 October
2009 Murano
B263D, B263E, B263F INTAKE DOOR MOTOR
HAC-63
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
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B263D, B263E, B263F INTAKE DOOR MOTOR
Description
INFOID:0000000003073059
COMPONENT DESCRIPTION
Intake Door Motor
• The intake door motor (1) is attached to the blower unit.
• It rotates so that air is drawn from inlets set by the A/C auto amp.
Motor rotation is conveyed to a lever which activates the intake
door.
DTC Logic
INFOID:0000000003443679
DTC DETECTION LOGIC
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
DTC CONFIRMATION PROCEDURE
1.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1.
Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2.
Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
Is DTC No.“B263D”, “B263E” or “B263F” displayed?
YES
>> Perform trouble diagnosis for the intake door motor. Refer to
NO
>> GO TO 2.
2.
FUNCTION INSPECTION
1.
Press intake switch.
2.
The intake switch indicator is turned ON. (REC position)
3.
Listen for intake door position change (Slight change of blower sound can be heard.).
4.
Press intake switch again.
5.
The intake switch indicator is turned OFF. (FRE position)
6.
Listen for intake door position change (Slight change of blower sound can be heard.).
Does it operate normally?
YES
>> INSPECTION END
NO
>> Check intake door motor installation, and repair or replace the malfunctioning parts.
:
Vehicle front
JPIIA0516ZZ
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
B263D
FRE DOOR FAIL
When the malfunctioning intake door posi-
tion is detected at FRE position
• Intake door motor (PBR internal
circuit is open or shorted)
• A/C auto amp.
• Harness and connector (LAN com-
munication line is open or shorted)
B263E
20P FRE DOOR FAIL
When the malfunctioning intake door posi-
tion is detected at 20%FRE position
B263F
REC DOOR FAIL
When the malfunctioning intake door posi-
tion is detected at REC position
Revision: 2008 October
2009 Murano
HAC-64
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
B263D, B263E, B263F INTAKE DOOR MOTOR
Diagnosis Procedure
INFOID:0000000003073061
1.
CHECK POWER SUPPLY FOR INTAKE DOOR MOTOR
Check voltage between intake door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK SIGNAL FOR INTAKE DOOR MOTOR
Confirm A/C LAN signal between intake door motor harness connector and ground using an oscilloscope.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK INTAKE DOOR MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect intake door motor connector.
3.
Check continuity between intake door motor harness connector and ground.
Is the inspection result normal?
YES
>> Replace intake door motor.
NO
>> Repair harness or connector.
(+)
(
−
)
Voltage
Intake door motor
—
Connector
Terminal
M304
1
Ground
Battery voltage
(+)
(
−
)
Voltage
Intake door motor
—
Connector
Terminal
M304
3
Ground
SJIA1453J
Intake door motor
—
Continuity
Connector
Terminal
M304
2
Ground
Existed
Revision: 2008 October
2009 Murano
B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR
HAC-65
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
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B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR
Description
INFOID:0000000003278254
COMPONENT DESCRIPTION
Upper Ventilator Door Motor
• The upper ventilator door motor (1) are attached to the heater &
cooling unit assembly.
• Upper ventilator door motor operates by UPPER VENT switch ON/
OFF when the DEF switch is OFF.
• Motor rotation is conveyed to a link which activates the upper ven-
tilator door.
DTC Logic
INFOID:0000000003443900
DTC DETECTION LOGIC
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
DTC CONFIRMATION PROCEDURE
1.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1.
Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2.
Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
Is DTC No.“B2661”, “B2662” or “B2663” displayed?
YES
>> Perform trouble diagnosis for the upper ventilator door motor. Refer to
.
NO
>> GO TO 2.
2.
FUNCTION INSPECTION
1.
Press the UPPER VENT switch.
2.
The UPPER VENT switch indicator is turned ON.
:
Vehicle front
JPIIA0514ZZ
DTC
Items
(CONSULT-III screen terms)
Diagnostic item is detected when...
Possible cause
B2661
UPPER VENT DOOR OPEN POSI
FAIL
When the malfunctioning upper ventilator
door position is detected at open position.
• Upper ventilator door motor (PBR
internal circuit is open or shorted)
• A/C auto amp.
• Harness and connector (LAN com-
munication line is open or shorted)
B2662
UPPER VENT DOOR MID POSI
FAIL
When the malfunctioning upper ventilator
door position is detected at middle posi-
tion.
B2663
UPPER VENT DOOR SHUT POSI
FAIL
When the malfunctioning upper ventilator
door position is detected at shut position.
Revision: 2008 October
2009 Murano
HAC-66
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR
3.
Check that the air blown from UPPER VENT does not greatly deviate from the air mix ratio.
4.
Press the UPPER VENT switch again.
5.
The UPPER VENT switch indicator is turned OFF.
6.
The air blown from UPPER VENT stops.
Does it operate normally?
YES
>> INSPECTION END
NO
>> Check upper ventilator door motor installation, and repair or replace the malfunctioning parts.
Diagnosis Procedure
INFOID:0000000003443944
1.
CHECK POWER SUPPLY FOR UPPER VENTILATOR DOOR MOTOR
Check voltage between upper ventilator door motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK SIGNAL FOR UPPER VENTILATOR DOOR MOTOR
Confirm A/C LAN signal between upper ventilator door motor harness connector and ground using an oscillo-
scope.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
JPIIA0509GB
(+)
(
−
)
Voltage
Upper ventilator door motor
—
Connector
Terminal
M51
2
Ground
Battery voltage
(+)
(
−
)
Voltage
Upper ventilator door motor
—
Connector
Terminal
M51
1
Ground
SJIA1453J
Revision: 2008 October
2009 Murano
B2661, B2662, B2663 UPPER VENTILATOR DOOR MOTOR
HAC-67
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
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3.
CHECK UPPER VENTILATOR DOOR MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect upper ventilator door motor connector.
3.
Check continuity between upper ventilator door motor harness connector and ground.
Is the inspection result normal?
YES
>> Replace upper ventilator door motor.
NO
>> Repair harness or connector.
Upper ventilator door motor
—
Continuity
Connector
Terminal
M51
3
Ground
Existed
Revision: 2008 October
2009 Murano
HAC-68
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
BLOWER MOTOR
BLOWER MOTOR
Description
INFOID:0000000003073066
COMPONENT DESCRIPTION
Brush-less Motor
The blower motor utilizes a brush-less motor with a rotating magnet.
Quietness is improved over previous motors where the brush was
the point of contact and the coil rotated.
Blower Motor Circuit
Component Function Check
INFOID:0000000003073067
1.
CHECK OPERATION
1.
Warm up the engine.
2.
Operate the fan control dial. Check that the fan speed and indicator are switched for all fan speeds.
Does it operate normally?
YES
>> INSPECTION END
NO
>> Perform trouble diagnosis for the blower motor. Refer to
Diagnosis Procedure
INFOID:0000000003073068
1.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1.
Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2.
Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
Is any DTC No. displayed?
YES
>> Perform the diagnosis that is applicable to the sensor and actuator. Refer to
.
NO
>> GO TO 2.
2.
CHECK WITH ACTIVE TEST OF CONSULT-III
1.
Using CONSULT-III, perform “HVAC TEST” “ACTIVE TEST” of HVAC to check each output device. Refer
to
HAC-38, "CONSULT-III Function"
.
NOTE:
Perform the ACTIVE TEST after starting the engine because the compressor is operated.
ZHA152H
JSIIA0999ZZ
Revision: 2008 October
2009 Murano
BLOWER MOTOR
HAC-69
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
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2.
Check that the blower motor control signal changes according to each indicator signal.
NOTE:
Perform the inspection of each output device after starting the engine because the compressor is operated.
Does it operate normally?
YES
>> INSPECTION END
NO
>> GO TO 3.
3.
CHECK POWER SUPPLY FOR BLOWER MOTOR
1.
Disconnect blower motor connector.
2.
Turn ignition switch ON.
3.
Check voltage between blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 7.
4.
CHECK BLOWER MOTOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between blower motor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair harness or connector.
5.
CHECK BLOWER MOTOR CIRCUIT CONTINUITY
1.
Disconnect A/C auto amp. connector.
2.
Check continuity between blower motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 6.
Test item
MODE 1
MODE 2
MODE 3
MODE 4
MODE 5
MODE 6
MODE 7
Mode door position
VENT1
VENT2
B/L1
B/L2
FOOT
D/F
DEF
Intake door position
REC
REC
20%FRE
20%FRE
FRE
FRE
FRE
Air mix door position
(driver & passenger
side)
FULL COLD
FULL HOT
FULL COLD
FULL HOT
FULL HOT
FULL HOT
FULL HOT
Blower motor duty ratio
35%
35%
61%
61%
81%
81%
35%
Compressor (Magnet
clutch)
ON
ON
ON
ON
OFF
OFF
ON
Upper ventilator door
OPEN
SHUT
OPEN
SHUT
SHUT
SHUT
SHUT
(+)
(
−
)
Voltage
Blower motor
—
Connector
Terminal
M98
1
Ground
Battery voltage
Blower motor
—
Continuity
Connector
Terminal
M98
3
Ground
Existed
Blower motor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M98
2
M50
32
Existed
Revision: 2008 October
2009 Murano
HAC-70
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
BLOWER MOTOR
NO
>> Repair harness or connector.
6.
CHECK A/C AUTO AMP. OUTPUT SIGNAL
1.
Reconnect blower motor connector and A/C auto amp. connector.
2.
Turn ignition switch ON.
3.
Set MODE switch to the VENT position.
4.
Check the output waveform between blower motor harness connector and ground using an oscilloscope,
while varying the fan speed from 1 to 7.
Is the inspection result normal?
YES
>> Replace the blower motor.
NO
>> Replace the A/C auto amp.
7.
CHECK POWER VOLTAGE OF BLOWER RELAY
1.
Turn the ignition switch OFF.
2.
Remove the blower relay. Refer to
PG-101, "Fuse, Connector and Terminal Arrangement"
3.
Turn the ignition switch ON.
4.
Check the voltage between blower relay fuse block side terminal and ground. Refer to
Connector and Terminal Arrangement"
for relay terminal assignment.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Inspection the power supply circuit. Refer to
PG-59, "Wiring Diagram - IGNITION POWER SUP-
8.
CHECK BLOWER RELAY
1.
Turn the ignition switch OFF.
2.
Install the blower relay. Refer to
PG-101, "Fuse, Connector and Terminal Arrangement"
.
3.
Turn the ignition switch ON.
4.
Check the operating sound of blower relay.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace the blower relay.
9.
CHECK FUSE
Check 15A fuses (Nos. 21 and 22).
NOTE:
JPIIA0616GB
(+)
(
−
)
Voltage
Blower relay
—
1
Ground
Battery voltage
3
Revision: 2008 October
2009 Murano
BLOWER MOTOR
HAC-71
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
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HAC
N
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PG-101, "Fuse, Connector and Terminal Arrangement"
for fuse location.
Is the inspection result normal?
YES
>> Repair the harnesses or connectors.
NO
>> Replace the fuse after repairing the applicable circuit.
Component Inspection
INFOID:0000000003073069
1.
CHECK BLOWER MOTOR
1.
Remove the blower motor. Refer to
.
2.
Check that the blower motor rotates smoothly.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace blower motor.
Revision: 2008 October
2009 Murano
HAC-72
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
MAGNET CLUTCH
MAGNET CLUTCH
Description
INFOID:0000000003073070
The magnet clutch drives the compressor, by an IPDM E/R signal.
Component Function Check
INFOID:0000000003073071
1.
FUNCTION INSPECTION
1.
Press AUTO switch.
2.
“AUTO” is indicated on the display.
3.
Press the A/C switch.
4.
Check that the indicator of the A/C switch turns on. Check visually and by sound that the compressor is
operating (the discharge air temperature or fan speed varies depending on the ambient temperature, in-
vehicle temperature, and temperature setting).
5.
Press the A/C switch again.
6.
Check that the indicator of the A/C switch turns OFF. Check visually and by sound that the compressor
stops.
Does it operate normally?
YES
>> INSPECTION END
NO
>> Perform trouble diagnosis for the compressor. Refer to
Diagnosis Procedure
INFOID:0000000003073072
1.
INSPECTION IN AUTO ACTIVE TEST MODE
Perform “AUTO ACTIVE TEST”. Refer to
PCS-10, "Diagnosis Description"
Does it operate normally?
YES
>> GO TO 5.
NO
>> GO TO 2.
2.
CHECK MAGNET CLUTCH
1.
Turn the ignition switch OFF.
2.
Disconnect the magnet clutch connector.
3.
Directly apply the battery voltage to the magnet clutch. Check for operation visually and by sound.
Does it operate normally?
YES
>> GO TO 3.
NO
>> Replace the compressor.
3.
CHECK MAGNET CLUTCH CIRCUIT CONTINUITY
1.
Turn the ignition switch OFF.
2.
Disconnect IPDM E/R connector.
3.
Check continuity between magnet clutch harness connector and IPDM E/R harness connector.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK FUSE
Check 10A fuse (No. 49).
NOTE:
Refer to
PG-103, "Fuse, Connector and Terminal Arrangement"
Is the inspection result normal?
YES
>> Replace IPDM E/R.
IPDM E/R
Compressor
Continuity
Connector
Terminal
Connector
Terminal
F12
48
F18
1
Existed
Revision: 2008 October
2009 Murano
MAGNET CLUTCH
HAC-73
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
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HAC
N
O
P
NO
>> Replace the fuse after repairing the applicable circuit.
5.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1.
Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2.
Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
Is any DTC No. displayed?
YES
>> Perform the diagnosis that is applicable to the sensor and actuator. Refer to
.
NO
>> GO TO 6.
6.
CHECK A/C AUTO AMP. INPUT SIGNAL
Using CONSULT-III, check “On/Off” of “COMP REQ SIG” and “FAN REQ SIG” in “DATA MONITOR” of HVAC.
Refer to
HAC-38, "CONSULT-III Function"
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace A/C auto amp.
7.
CHECK REFRIGERANT PRESSURE SENSOR
Check refrigerant pressure sensor. Refer to
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace malfunctioning parts.
A/C SWITCH ON
: COMP REQ SIG On
A/C SWITCH OFF
: COMP REQ SIG Off
FAN CONTROL DIAL ON
: FAN REQ SIG On
FAN CONTROL DIAL OFF
: FAN REQ SIG Off
Revision: 2008 October
2009 Murano
HAC-74
< COMPONENT DIAGNOSIS >
[WITHOUT 7 INCH DISPLAY]
A/C CONTROL SIGNAL CIRCUIT
A/C CONTROL SIGNAL CIRCUIT
Diagnosis Procedure
INFOID:0000000003597944
1.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1.
Using CONSULT-III, perform “SELF-DIAGNOSIS RESULTS” of HVAC.
2.
Check if any DTC No. is displayed in the self-diagnosis results.
NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
Is any DTC No. displayed?
YES
>> Perform the diagnosis that is applicable to the sensor and actuator. Refer to
.
NO
>> GO TO 2.
2.
CHECK TX (A/C CONTROL
→
A/C AUTO AMP.) CIRCUIT CONTINUITY
1.
Disconnect the A/C control and the A/C auto amp. connector.
2.
Check continuity between A/C control harness connector and A/C auto amp. harness connector.
3.
Check continuity between A/C control harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK RX (A/C AUTO AMP.
→
A/C CONTROL) CIRCUIT CONTINUITY
1.
Disconnect the A/C control and the A/C auto amp. connector.
2.
Check continuity between A/C control harness connector and A/C auto amp. harness connector.
3.
Check continuity between A/C control harness connector and ground.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for the A/C control. Refer to
HAC-76, "A/C CONTROL : Diagnosis Pro-
NO
>> Repair harness or connector.
A/C control
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M95
4
M50
7
Existed
A/C control
—
Continuity
Connector
Terminal
M95
4
Ground
Not existed
A/C control
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M95
3
M50
6
Existed
A/C control
—
Continuity
Connector
Terminal
M95
3
Ground
Not existed
Revision: 2008 October
2009 Murano
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