Infiniti QX56 (Z62). Manual — part 796
B2578, B2579 FRONT IN-VEHICLE SENSOR
HAC-75
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK FRONT IN-VEHICLE SENSOR
Check front in-vehicle sensor. Refer to
HAC-107, "Component Inspection"
.
Is the inspection result normal?
YES
>> Replace A/C auto amp.. Refer to
HAC-146, "Removal and Installation"
NO
>> Replace front in-vehicle sensor. Refer to
HAC-148, "FRONT A/C UNIT ASSEMBLY : Removal
.
4.
CHECK FRONT IN-VEHCLE SENSOR POWER SUPPLY CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Disconnect A/C auto amp. connector.
3.
Check continuity between front in-vehicle sensor harness connector and A/C auto amp. harness connec-
tor.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair harness or connector.
5.
CHECK FRONT IN-VEHCLE SENSOR POWER SUPPLY CIRCUIT FOR GROUND SHORT
Check continuity between front in-vehicle sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK FRONT IN-VEHICLE SENSOR POWER SUPPLY CIRCUIT FOR POWER SHORT
1.
Turn ignition switch ON.
2.
Check voltage between front in-vehicle sensor harness connector and ground.
Is the inspection result normal?
YES
>> Replace A/C auto amp.. Refer to
HAC-146, "Removal and Installation"
NO
>> Repair harness or connector.
Component Inspection
INFOID:0000000006275911
1.
CHECK FRONT IN-VEHICLE SENSOR
1.
Turn ignition switch OFF.
2.
Disconnect front in-vehicle sensor connector.
3.
Check resistance between front in-vehicle sensor terminals.
Front in-vehicle sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
M73
1
M50
27
Existed
Front in-vehicle sensor
—
Continuity
Connector
Terminal
M73
1
Ground
Not existed
+
−
Voltage
(Approx.)
Front in-vehicle sensor
Connector
Terminal
M73
1
Ground
0 V
HAC-76
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
B2578, B2579 FRONT IN-VEHICLE SENSOR
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace front in-vehicle sensor. Refer to
HAC-148, "FRONT A/C UNIT ASSEMBLY : Removal
.
Terminal
Condition
Resistance: k
Ω
Temperature:
°
C (
°
F)
1
2
−
15 (5)
12.73
−
10 (14)
9.92
−
5 (23)
7.80
0 (32)
6.19
5 (41)
4.95
10 (50)
3.99
15 (59)
3.24
20 (68)
2.65
25 (77)
2.19
30 (86)
1.81
35 (95)
1.51
40 (104)
1.27
45 (113)
1.07
B257B, B257C AMBIENT SENSOR
HAC-77
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
B257B, B257C AMBIENT SENSOR
DTC Logic
INFOID:0000000006275912
DTC DETECTION LOGIC
NOTE:
• If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
.
• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010.
.
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “Self Diagnostic Result” mode of “HVAC” using CONSULT-III.
3.
Check DTC.
Is DTC detected?
YES
>> Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006275913
1.
CHECK AMBIENT SENSOR POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect ambient sensor connector.
3.
Turn ignition switch ON.
4.
Check voltage between ambient sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK AMBIENT SENSOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect A/C auto amp.connector.
3.
Check continuity between ambient sensor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
DTC
Items
(CONSULT-III screen terms)
DTC detection condition
Possible cause
B257B
AMBIENT SENSOR
The ambient sensor recognition temperature is
too high.
• Ambient sensor
• A/C auto amp.
• Harness or connectors
(The sensor circuit is open or short-
ed.)
B257C
The ambient sensor recognition temperature is
too low.
+
−
Voltage
(Approx.)
Ambient sensor
Connector
Terminal
E76
1
Ground
5 V
Ambient sensor
—
Continuity
Connector
Terminal
E76
2
Ground
Existed
HAC-78
< DTC/CIRCUIT DIAGNOSIS >
[AUTOMATIC AIR CONDITIONING]
B257B, B257C AMBIENT SENSOR
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK AMBIENT SENSOR
Check ambient sensor. Refer to
HAC-78, "Component Inspection"
.
Is the inspection result normal?
YES
>> Replace A/C auto amp.. Refer to
HAC-146, "Removal and Installation"
NO
>> Replace ambient sensor. Refer to
HAC-147, "Removal and Installation"
4.
CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
Disconnect A/C auto amp.connector.
3.
Check continuity between ambient sensor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair harness or connector.
5.
CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR GROUND SHORT
Check continuity between ambient sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK AMBIENT SENSOR POWER SUPPLY CIRCUIT FOR POWER SHORT
1.
Turn ignition switch ON.
2.
Check voltage between ambient sensor harness connector and ground.
Is the inspection result normal?
YES
>> Replace A/C auto amp.. Refer to
HAC-146, "Removal and Installation"
NO
>> Repair harness or connector.
Component Inspection
INFOID:0000000006275914
1.
CHECK AMBIENT SENSOR
1.
Turn ignition switch OFF.
2.
Disconnect ambient sensor connector.
3.
Check resistance between ambient sensor terminals.
Ambient sensor
A/C auto amp.
Continuity
Connector
Terminal
Connector
Terminal
E76
1
M50
7
Existed
Ambient sensor
—
Continuity
Connector
Terminal
E76
1
Ground
Not existed
+
−
Voltage
(Approx.)
Ambient sensor
Connector
Terminal
E76
1
Ground
0 V
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст