Nissan Qashqai (2007-2010). Manual — part 929
HAC-76
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
PTC HEATER
• BCM – IPDM E/R
• BCM – ECM
Is the inspection result normal?
YES
>> Replace IPDM E/R.
NO
>> Repair or replace malfunctioning part(s).
Component Inspection
INFOID:0000000001026740
PTC HEATER
The PTC heater (1) is attached to the A/C unit assembly.
It generates heat electrically.
PTC RELAY
Check continuity between terminal 3 and 5.
JPIIA0033ZZ
Terminal
Condition
Continuity
3 and 5
12V direct current supply between terminal 1 and 2
Exist
No current supply
Not exist
PBIB0098E
OAT SENSOR
HAC-77
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
OAT SENSOR
Description
INFOID:0000000000954660
COMPONENT DESCRIPTION
OAT (Outside Air Temperature) Sensor
The OAT sensor (1) is attached on the radiator core support. It
detects ambient temperature and converts it into a resistance value
which is then input into the auto amp.
OAT Sensor Circuit
AMBIENT TEMPERATURE INPUT PROCESS
The auto amp. includes a processing circuit for the OAT sensor input. However, when the temperature
detected by the OAT sensor increases quickly, the processing circuit retards the auto amp. function. It only
allows the auto amp. to recognize an ambient temperature increase of 0.33
°
C (0.6
°
F) per 100 seconds.
As an example, consider stopping for a few minutes after high speed driving. Although the actual ambient tem-
perature has not changed, the temperature detected by the OAT sensor will increase. This is because the heat
from the engine compartment can radiate to the front bumper area, location of the OAT sensor.
Component Function Check
INFOID:0000000000954661
1.
PERFORM SELF-DIAGNOSIS STEP-2
Perform self-diagnosis STEP-2. Refer to
HAC-27, "Diagnosis Description"
, see No. 1 to 3.
21 or
−
21 is displayed.
YES
>> Go to Diagnosis Procedure. Refer to
.
NO
>> END.
Diagnosis Procedure
INFOID:0000000000954662
1.
CHECK VOLTAGE BETWEEN OAT SENSOR AND GROUND
1.
Disconnect OAT sensor connector.
2.
Turn ignition switch ON.
3.
Check voltage between OAT sensor harness connector E52 terminal 4 and ground.
JPIIA0091ZZ
JPIIA0125GB
HAC-78
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
OAT SENSOR
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK CIRCUIT CONTINUITY BETWEEN OAT SENSOR AND AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect auto amp. connector.
3.
Check continuity between OAT sensor harness connector E52 terminal 3 and auto amp. harness connec-
tor M53 terminal 26.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK OAT SENSOR
HAC-78, "Component Inspection"
.
Is the inspection result normal?
YES
>> Replace auto amp.
NO
>> Replace OAT sensor.
4.
CHECK CIRCUIT CONTINUITY BETWEEN OAT SENSOR AND AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect auto amp. connector.
3.
Check continuity between OAT sensor harness connector E52 terminal 4 and auto amp. harness connec-
tor M53 terminal 28.
4.
Check continuity between OAT sensor harness connector E52 terminal 4 and ground.
Is the inspection result normal?
YES
>> Replace auto amp.
NO
>> Repair harness or connector.
Component Inspection
INFOID:0000000000954663
(+)
(
−
)
Voltage
OAT sensor
—
Connector
Terminal
E52
4
Ground
Approx. 5
OAT sensor
Auto amp.
Continuity
Connector
Terminal
Connector
Terminal
E52
3
M53
26
Continuity should exist
OAT sensor
Auto amp.
Continuity
Connector
Terminal
Connector
Terminal
E52
4
M53
28
Continuity should exist
OAT sensor
—
Continuity
Connector
Terminal
E52
4
Ground
Continuity should not exist
OAT SENSOR
HAC-79
< COMPONENT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
After disconnecting OAT sensor (1) connector E52, measure resis-
tance between terminals 3 and 4 at sensor side. Refer to table
below.
If NG, replace OAT sensor.
Temperature
°
C (
°
F)
Resistance k
Ω
−
30 (
−
22)
13.33
−
20 (
−
4)
7.89
−
10 (14)
4.80
0 (32)
6.19
5 (41)
1.81
10 (50)
1.16
20 (68)
0.77
30 (86)
0.52
40 (104)
0.36
JPIIA0092ZZ
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