Nissan Note E12. Instruction — part 377
A/C ON SIGNAL
HAC-31
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
DTC/CIRCUIT DIAGNOSIS
A/C ON SIGNAL
Component Function Check
INFOID:0000000009477942
1.
CHECK A/C ON SIGNAL
With CONSULT
1. Turn ignition switch ON.
2. Operate front blower motor.
3. Select “AIR CONDITIONER” of “BCM” using CONSULT.
4. Select “AIR COND SW” in “DATA MONITOR” mode, and check status under the following condition.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Refer to
Diagnosis Procedure
INFOID:0000000009477943
Regarding Wiring Diagram information, refer to
1.
CHECK FUSE
1. Turn ignition switch OFF.
2. Check 10A fuse (No. 21, located in fuse block (J/B)].
NOTE:
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit.
2.
CHECK THERMO CONTROL AMP. POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect thermo control amp. connector.
3. Turn ignition switch ON.
4. Check voltage between thermo control amp. harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector between thermo control amp. and fuse.
3.
CHECK THERMO CONTROL AMP. GROUND CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between thermo control amp. harness connector and front air control harness connector.
Monitor item
Condition
Status
AIR COND SW
A/C switch
ON
On
OFF
Off
+
−
Voltage (V)
(Approx.)
Thermo control amp.
Connector
Terminal
M42
3
Ground
Battery voltage
HAC-32
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
A/C ON SIGNAL
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK A/C ON SIGNAL
1. Turn ignition switch ON.
2. Check output waveform between thermo control amp. harness connector and ground with using oscillo-
scope.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 6.
5.
CHECK FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Check front air control. Refer to
HAC-32, "Component Inspection"
.
Is the inspection result normal?
YES
>> Replace thermo control amp. Refer to
HAC-48, "Removal and Installation"
NO
>> Replace front air control. Refer to
HAC-47, "Removal and Installation"
.
6.
CHECK A/C ON SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between thermo control amp. harness connector and BCM harness connector.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-67, "Removal and Installation"
NO
>> Repair harness or connector.
Component Inspection
INFOID:0000000009477944
1.
CHECK A/C CONTROL
Check continuity front air control terminals.
Thermo control amp.
Front air control
Continuity
Connector
Terminal
Connector
Terminal
M42
1
M33
14
Yes
+
−
Output waveform
Thermo control amp.
Connector
Terminal
M42
2
Ground
JPMIA0012GB
Thermo control amp.
BCM
Continuity
Connector
Terminal
Connector
Terminal
M42
2
M18
27
Yes
A/C ON SIGNAL
HAC-33
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace front air control. Refer to
HAC-47, "Removal and Installation"
.
Terminal
Condition
Continuity
14
6
A/C switch: ON
Fan control dial: Except OFF position
Yes
HAC-34
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
BLOWER FAN ON SIGNAL
BLOWER FAN ON SIGNAL
Component Function Check
INFOID:0000000009477945
1.
CHECK BLOWER FAN ON SIGNAL
With CONSULT
1. Turn ignition switch ON.
2. Select “AIR CONDITIONER” of “BCM” using CONSULT.
3. Select “FAN ON SIG” in “DATA MONITOR” mode, and check status under the following condition.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Refer to
Diagnosis Procedure
INFOID:0000000009477946
Regarding Wiring Diagram information, refer to
1.
CHECK BLOWER FAN ON SIGNAL
1. Turn ignition switch OFF.
2. Disconnect front air control harness connector.
3. Turn ignition switch ON.
4. Check output waveform between front air control and ground with using oscilloscope.
Is the inspection result normal?
YES
>> Replace front air control. Refer to
HAC-47, "Removal and Installation"
.
NO
>> GO TO 2.
2.
CHECK BLOWER FAN ON SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity front air control harness connector and BCM harness connector.
Is the inspection result normal?
YES
>> GO TO 3.
Monitor item
Condition
Status
FAN ON SIG
Fan control dial
Except OFF position
On
OFF position
Off
+
−
Output waveform
Front air control
Connector
Terminal
M33
5
Ground
PKIB4960J
Front air control
BCM
Continuity
Connector
Terminal
Connector
Terminal
M33
5
M18
28
Yes
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