Infiniti Q45. Manual — part 132
TROUBLE DIAGNOSIS
ATC-123
C
D
E
F
G
H
I
K
L
M
A
B
ATC
DIAGNOSIS PROCEDURE FOR MULTIPLEX COMMUNICATION CIRCUIT (REAR CONTROL
SWITCH)
SYMPTOM: Rear control switch A/C operation does not work.
1.
CHECK FOR AUTO AMP. OUTPUT
1.
Turn ignition switch ON.
2.
Confirm multiplex communication signal between auto amp. har-
ness connector M120 terminal 30, 31 and ground using an oscil-
loscope.
OK or NG
OK
>> GO TO 2
NG
>> Replace auto amp.
2.
CHECK CIRCUIT CONTINUITY BETWEEN REAR CONTROL SWITCH AND AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect rear control switch connector and auto amp. connec-
tor.
3.
Check continuity between rear control switch harness connector
B502 terminals 3, 4 and auto amp. harness connector M120 ter-
minals 30, 31.
OK or NG
OK
>> GO TO 3.
NG
>> Repair harness or connector.
Terminals
Voltage
(+)
(
−
)
Auto amp.
connector
Terminal No.
M120
30
Ground
31
RJIA3075E
HAK0364D
RJIA0215E
3 – 30
: Continuity should exist.
4 – 31
: Continuity should exist.
RJIA3076E
ATC-124
TROUBLE DIAGNOSIS
3.
CHECK FOR AUTO AMP. INPUT
1.
Reconnect rear control switch connector and auto amp. connec-
tor.
2.
Turn ignition switch ON.
3.
Confirm multiplex communication signal between auto amp. har-
ness connector M119 terminal 15 and ground using an oscillo-
scope.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 4.
4.
CHECK CIRCUIT CONTINUITY BETWEEN REAR CONTROL SWITCH AND AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect rear control switch connector and auto amp. connec-
tor.
3.
Check continuity between rear control switch harness connector
B502 terminal 11 and auto amp. harness connector M119 termi-
nal 15.
OK or NG
OK
>> Replace rear control switch.
NG
>> Repair harness or connector.
Terminals
Voltage
(+)
(
−
)
Auto amp.
connector
Terminal No.
M119
15
Ground
RJIA3077E
RJIA0214E
11–15
: Continuity should exist.
RJIA3078E
CONTROLLER
ATC-125
C
D
E
F
G
H
I
K
L
M
A
B
ATC
CONTROLLER
PFP:27500
Removal and Installation of Multifunction Switch
NJS000CL
REMOVAL
Refer to
IP-10, "INSTRUMENT PANEL ASSEMBLY"
INSTALLATION
Installation is basically the reverse order of removal.
Removal and Installation of Rear Control Switch
NJS000CM
REMOVAL
Refer to
AV-55, "Removal and Installation of Rear Control Switch"
.
INSTALLATION
Installation is basically the reverse order of removal.
Removal and Installation of Rear Control Cancel Switch
NJS000CN
REMOVAL
Refer to
AV-55, "Removal and Installation of Rear Control Cancel Switch"
INSTALLATION
Installation is basically the reverse order of removal.
ATC-126
AMBIENT SENSOR
AMBIENT SENSOR
PFP:27722
Removal and Installation
NJS00091
REMOVAL
1.
Remove front grille. Refer to
2.
Disconnect ambient sensor connector, and then remove ambi-
ent sensor.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA3203E
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