Nissan Maxima. Manual — part 747
HAC-164
< DTC/CIRCUIT DIAGNOSIS >
[WITH MONOCHROME DISPLAY]
A/C SWITCH ASSEMBLY SIGNAL CIRCUIT
A/C SWITCH ASSEMBLY SIGNAL CIRCUIT
Diagnosis Procedure
INFOID:0000000010051167
Regarding Wiring Diagram information, refer to
HAC-173, "Wiring Diagram - With Monochrome Display"
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
Is any DTC No. displayed?
YES
>> Perform diagnosis for the applicable DTC. Refer to
NO
>> GO TO 2.
2.
CHECK RX (A/C SWITCH ASSEMBLY
→ A/C AUTO AMP.) CIRCUIT CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect the A/C switch assembly and the A/C auto amp.
connectors.
3. Check continuity between A/C switch assembly harness con-
nector M104 (A) terminal 4 and A/C auto amp. harness connec-
tor M37 (B) terminal 7.
4. Check continuity between A/C switch assembly harness con-
nector M104 (A) terminal 4 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK TX (A/C AUTO AMP.
→ A/C SWITCH ASSEMBLY) CIRCUIT CONTINUITY
1. Check continuity between A/C switch assembly harness con-
nector M104 (A) terminal 3 and A/C auto amp. harness connec-
tor M37 (B) terminal 6.
2. Check continuity between A/C switch assembly harness con-
nector M104 (A) terminal 3 and ground.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for the A/C switch assembly.
HAC-166, "A/C SWITCH ASSEMBLY : Diagnosis Procedure"
.
NO
>> Repair harness or connector.
4 - 7
: Continuity should exist.
4 - Ground
: Continuity should not exist.
AWIIA1177ZZ
3 - 6
: Continuity should exist.
3 - Ground
: Continuity should not exist.
AWIIA1178ZZ
POWER SUPPLY AND GROUND CIRCUIT
HAC-165
< DTC/CIRCUIT DIAGNOSIS >
[WITH MONOCHROME DISPLAY]
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. : Description
INFOID:0000000010051168
COMPONENT DESCRIPTION
A/C Auto Amp. (Air Conditioner Automatic Amplifier)
The A/C auto amp. (1) has a built-in microcomputer that processes
information sent from various sensors needed for air conditioner
operation. The air mix door motor(s), the mode door motor, the
intake door motor, the blower motor and the A/C compressor are
then controlled.
When the various switches and temperature control switches are
operated, data is input to the A/C auto amp. from the AV switch
assembly using CAN communication.
The A/C auto amp. is operated with control mechanisms. Signals
from various switches and Potentio Temperature Control (PTC) are
directly entered into the A/C auto amp.
Power Supply and Ground Circuit for A/C Auto Amp.
A/C AUTO AMP. : Component Function Check
INFOID:0000000010051169
1.
CHECK OPERATION
1. Press the AUTO switch, and then check that “AUTO” is shown on the display.
2. Operate the temperature control switch (driver side). Check that the fan speed or outlet changes. (The
discharge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera-
ture, and temperature setting.)
Does it operate normally?
YES
>> Inspection End.
NO
>> Perform trouble diagnosis for the A/C system. Refer to
HAC-165, "A/C AUTO AMP. : Diagnosis
.
A/C AUTO AMP. : Diagnosis Procedure
INFOID:0000000010051170
Regarding Wiring Diagram information, refer to
HAC-173, "Wiring Diagram - With Monochrome Display"
1.
CHECK A/C AUTO AMP. POWER SUPPLY
ALIIA0319ZZ
JPIIA0617GB
HAC-166
< DTC/CIRCUIT DIAGNOSIS >
[WITH MONOCHROME DISPLAY]
POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the A/C auto amp. connector.
3. Turn ignition switch ON.
4. Check voltage between A/C auto amp. harness connector M37
terminals 17, 20, 40 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK FUSE
Check 10A fuses [Nos. 3, 6 and 17, located in the fuse block (J/B)].
NOTE:
.
Is the inspection result normal?
YES
>> Check harness for open circuit. Repair or replace if necessary.
NO
>> Check harness for short circuit. Repair or replace if necessary.
3.
CHECK A/C AUTO AMP. GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between A/C auto amp. harness connector
M37 terminals 19, 39 and ground.
Is the inspection result normal?
YES
>> Replace the A/C auto amp. Refer to
.
NO
>> Repair the harnesses or connectors.
A/C SWITCH ASSEMBLY
A/C SWITCH ASSEMBLY : Component Function Check
INFOID:0000000010051171
1.
CHECK OPERATION
1. Press the AUTO switch, and then check that “AUTO” is shown on the display.
2. Operate the temperature control switch (driver side). Check that the fan speed or outlet changes. (The
discharge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera-
ture, and temperature setting.)
Does it operate normally?
YES
>> Inspection End.
NO
>> Perform trouble diagnosis for the A/C switch assembly. Refer to
ASSEMBLY : Diagnosis Procedure"
.
A/C SWITCH ASSEMBLY : Diagnosis Procedure
INFOID:0000000010051172
(+)
(
−)
Voltage
A/C auto amp.
—
Ignition switch position
Connector
Terminal
OFF
ACC
ON
M37
17
Ground
Approx. 0V
Battery
voltage
Battery
voltage
20
Approx. 0V
Approx. 0V
Battery
voltage
40
Battery
voltage
Battery
voltage
Battery
voltage
AWIIA1172ZZ
19, 39 - Ground
: Continuity should exist.
AWIIA1173ZZ
POWER SUPPLY AND GROUND CIRCUIT
HAC-167
< DTC/CIRCUIT DIAGNOSIS >
[WITH MONOCHROME DISPLAY]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
Regarding Wiring Diagram information, refer to
HAC-173, "Wiring Diagram - With Monochrome Display"
1.
CHECK A/C SWITCH ASSEMBLY POWER SUPPLY
1. Disconnect the A/C switch assembly connector.
2. Turn ignition switch ON.
3. Check voltage between A/C switch assembly harness connector
M104 terminal 1 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK FUSE
Check 10A fuse [No.3, located in the fuse block (J/B)].
NOTE:
.
Is the inspection result normal?
YES
>> Check harness for open circuit. Repair or replace if necessary.
NO
>> Check harness for short circuit. Repair or replace if necessary.
3.
CHECK A/C SWITCH ASSEMBLY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between A/C switch assembly harness con-
nector M104 terminal 2 and ground.
Is the inspection result normal?
YES
>> Replace the A/C switch assembly. Refer to
.
NO
>> Repair the harnesses or connectors.
A/C DISPLAY UNIT
A/C DISPLAY UNIT : Diagnosis Procedure
INFOID:0000000010051173
Regarding Wiring Diagram information, refer to
HAC-173, "Wiring Diagram - With Monochrome Display"
1.
CHECK A/C DISPLAY UNIT POWER SUPPLY CIRCUIT
(+)
(
−)
Voltage
A/C switch assembly
—
Ignition switch position
Connector
Terminal
OFF
ACC
ON
M104
1
Ground
Approx. 0V
Approx. 0V
Battery
voltage
AWIIA1179ZZ
2 - Ground
: Continuity should exist.
AWIIA1180ZZ
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст