Nissan Leaf. Manual — part 832
B27C4, B27C5 A/C UNIT CASE TEMPERATURE SENSOR
HAC-331
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Check continuity between PTC heater outlet air and A/C unit case temperature sensor assembly harness con-
nector and ground.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-347, "Removal and Installation"
.
NO
>> Repair harness or connector.
7.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-53, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-347, "Removal and Installation"
.
NO
>> Repair or replace malfunctioning components.
Component Inspection
INFOID:0000000010122041
1.
CHECK A/C CASE UNIT TEMPERATURE SENSOR
1. Remove PTC heater outlet air and A/C unit case temperature sensor assembly. Refer to
2. Check resistance between PTC heater outlet air and A/C unit case temperature sensor assembly termi-
nals. Refer to applicable table for the normal value.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace PTC heater outlet air and A/C unit case temperature sensor assembly. Refer to
198, "Removal and Installation"
PTC heater outlet air and A/C unit case temperature sensor as-
sembly
—
Continuity
Connector
Terminal
M138
4
Ground
No
Terminal
Condition
Resistance: k
Ω
Temperature:
°C (°F)
3
4
0 (32)
6.00
10 (50)
3.87
20 (68)
2.57
30 (86)
1.76
40 (104)
1.23
60 (140)
0.64
80 (176)
0.36
100 (212)
0.22
HAC-332
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
B27FF A/C AUTO AMP.
B27FF A/C AUTO AMP.
DTC Logic
INFOID:0000000010122042
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn power switch OFF.
2. Set the vehicle to READY.
3. Operate the automatic air conditioning system.
4. Set the temperature to full cold and wait at least 2 seconds.
5. Select “Self Diagnostic Result” of “HVAC” using CONSULT.
6. Check DTC.
Is DTC detected?
YES
>> Refer to
HAC-332, "Diagnosis Procedure"
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010122043
1.
PERFORM A/C AUTO AMP. CONFIGURATION
With CONSULT
1. Turn power switch ON
2. Use CONSULT and perform configuration (control unit setting) of “HVAC”. Refer to
>> Inspection End.
DTC
Items
(CONSULT screen terms)
DTC detection condition
Possible cause
B27FF
CONFIG NOT IMPLEM
When A/C auto amp. configuration (control unit
setting) is not performed.
A/C auto amp (Not performed config-
uration)
POWER SUPPLY AND GROUND CIRCUIT
HAC-333
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
POWER SUPPLY AND GROUND CIRCUIT
A/C AUTO AMP.
A/C AUTO AMP. : Diagnosis Procedure
INFOID:0000000010122044
Regarding Wiring Diagram information, refer to
1.
CHECK SYMPTOM
Check symptom (A or B).
Which symptom is detected?
A
>> GO TO 2.
B
>> GO TO 4.
2.
CHECK FUSE
1. Turn power switch OFF.
2. Check 10A fuse [No. 3, located in fuse block (J/B)].
NOTE:
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace the blown fuse after repairing the affected circuit.
3.
CHECK A/C AUTO AMP. POWER SWITCH POWER SUPPLY
1. Disconnect A/C auto amp. connector.
2. Turn power switch ON.
3. Check voltage between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector between A/C auto amp. and fuse.
4.
CHECK FUSE
1. Turn power switch OFF.
2. Check 10A fuse [No.13, located in fuse block (J/B)].
NOTE:
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace the blown fuse after repairing the affected circuit.
5.
CHECK A/C AUTO AMP. BATTERY POWER SUPPLY
1. Disconnect A/C auto amp. connector.
Symptom
A
• Air conditioning system does not activate.
• Air conditioning system does cannot be controlled.
• Operation status of air conditioning system is not indicated on display.
B
• Memory function does not operate normally.
• The setting is not maintained. (It returns to the initial condition)
+
−
Voltage
(Approx.)
A/C auto amp.
Connector
Terminal
M55
32
Ground
9 V or more
HAC-334
< DTC/CIRCUIT DIAGNOSIS >
[AUTO A/C (WITHOUT HEAT PUMP)]
POWER SUPPLY AND GROUND CIRCUIT
2. Check voltage between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector between A/C auto amp. and fuse.
6.
CHECK A/C AUTO AMP. GROUND CIRCUIT FOR OPEN
1. Turn power switch OFF.
2. Check continuity between A/C auto amp. harness connector and ground.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-347, "Removal and Installation"
.
NO
>> Repair harness or connector.
+
−
Voltage
(Approx.)
A/C auto amp.
Connector
Terminal
M55
31
Ground
Battery voltage
A/C auto amp.
—
Continuity
Connector
Terminal
M55
10
Ground
Yes
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