Nissan Maxima. Instruction — part 716
HAC-40
< DTC/CIRCUIT DIAGNOSIS >
[WITH COLOR DISPLAY]
B2581, B2582 INTAKE SENSOR
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace intake sensor. Refer to
HAC-104, "Removal and Installation"
Terminal
Condition
Resistance k
Ω
Temperature
°C (°F)
1
2
−15 (5)
18.63
−10 (14)
14.15
−5 (23)
10.86
0 (32)
8.41
5 (41)
6.58
10 (50)
5.19
15 (59)
4.12
20 (68)
3.30
25 (77)
2.67
30 (86)
2.17
35 (95)
1.78
40 (104)
1.46
45 (113)
1.21
B2630, B2631 SUNLOAD SENSOR
HAC-41
< DTC/CIRCUIT DIAGNOSIS >
[WITH COLOR DISPLAY]
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B2630, B2631 SUNLOAD SENSOR
Description
INFOID:0000000010050982
COMPONENT DESCRIPTION
Sunload Sensor
• The sunload sensor (1) is located on the driver’side defroster grille.
• It detects sunload entering through windshield by means of a
photo diode. The sensor converts the sunload into a current value,
which is then input into the A/C auto amp.
Sunload Sensor Circuit
SUNLOAD INPUT PROCESS
The A/C auto amp. also equips a processing circuit which averages the variations in detected sunload over a
period of time. This prevents drastic swings in the air temperature control system operation due to small or
quick variations in detected sunload.
For example, consider driving along a road bordered by an occasional group of large trees. The sunload
detected by the sunload sensor varies whenever the trees obstruct the sunlight. The processing circuit aver-
ages the detected sunload over a period of time, so that the (insignificant) effect of the trees momentarily
obstructing the sunlight does not cause any change in the air temperature control system operation. On the
other hand, shortly after entering a long tunnel, the system recognizes the change in sunload, and the system
reacts accordingly.
DTC Logic
INFOID:0000000010050983
DTC DETECTION LOGIC
NOTE:
• If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to
.
• Sunload sensor may register a malfunction when indoors, at dusk, or at other times when light is insufficient.
When performing the diagnosis indoors, light the sunload sensor with a lamp (60W or more).
AWIIA0033ZZ
JPIIA0615GB
DTC
Items
(CONSULT screen terms)
Diagnostic item is detected when...
Possible cause
B2630
SUNLOAD SEN (SHORT)
Detected calorie at sunload sensor 1395 w/m
2
(1200 kcal/m
2
·h) or more
• Sunload sensor
• A/C auto amp.
• Harness and connector
(Sunload sensor circuit is open, or
there is a short in the circuit)
B2631
SUNLOAD SEN (OPEN)
Detected calorie at sunload sensor 0 w/m
2
(0 kcal/m
2
·h)
HAC-42
< DTC/CIRCUIT DIAGNOSIS >
[WITH COLOR DISPLAY]
B2630, B2631 SUNLOAD SENSOR
DTC CONFIRMATION PROCEDURE
1.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT
1. Using CONSULT, 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
.
• Sunload sensor may register a malfunction when indoors, at dusk, or at other times when light is insufficient.
When performing the diagnosis indoors, light the sunload sensor with a lamp (60W or more).
Is DTC No.“B2630” or “B2631” displayed?
YES
>> Perform trouble diagnosis for the sunload sensor. Refer to
.
NO
>> Inspection End.
Diagnosis Procedure
INFOID:0000000010050984
Regarding Wiring Diagram information, refer to
HAC-67, "Wiring Diagram - With Color Display"
.
1.
CHECK SUNLOAD SENSOR POWER SUPPLY
1. Disconnect sunload sensor connector.
2. Turn ignition switch ON.
3. Check voltage between sunload sensor harness connector M56
terminal 1 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK CONTINUITY BETWEEN SUNLOAD SENSOR AND A/C AUTO AMP.
1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between sunload sensor harness connector
M56 (A) terminal 2 and A/C auto amp. harness connector M37
(B) terminal 37.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK SUNLOAD SENSOR
1. Reconnect sunload sensor connector and A/C auto amp. connector.
2. Check sunload sensor. Refer to
HAC-43, "Component Inspection"
.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-100, "Removal and Installation"
.
NO
>> Replace sunload sensor. Refer to
HAC-103, "Removal and Installation"
4.
CHECK CONTINUITY BETWEEN SUNLOAD SENSOR AND A/C AUTO AMP.
1 - Ground
: Approx. 5V
AWIIA1139ZZ
2 - 37
: Continuity should exist.
AWIIA1140ZZ
B2630, B2631 SUNLOAD SENSOR
HAC-43
< DTC/CIRCUIT DIAGNOSIS >
[WITH COLOR DISPLAY]
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1. Turn ignition switch OFF.
2. Disconnect A/C auto amp. connector.
3. Check continuity between sunload sensor harness connector
M56 (A) terminal 1 and A/C auto amp. harness connector M37
(B) terminal 15.
4. Check continuity between sunload sensor harness connector
M56 (A) terminal 1 and ground.
Is the inspection result normal?
YES
>> Replace A/C auto amp. Refer to
HAC-100, "Removal and Installation"
.
NO
>> Repair harness or connector.
Component Inspection
INFOID:0000000010050985
1.
CHECK SUNLOAD SENSOR
1. Turn ignition switch ON.
2. Check voltage between A/C auto amp. harness connector and ground.
NOTE:
Select a place in direct sunlight when checking sunload sensor.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace sunload sensor. Refer to
HAC-103, "Removal and Installation"
1 - 15
: Continuity should exist.
1 - Ground
: Continuity should not exist.
AWIIA1141ZZ
(+)
(
−)
A/C auto amp.
Connector
Terminal
M37
15
Ground
AWIIA1189GB
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