Infiniti Q45 (FY33). Manual — part 482
RHA968F
In-vehicle Sensor Circuit
COMPONENT DESCRIPTION
In-vehicle sensor
The in-vehicle sensor is located on instrument lower panel. It con-
verts variations in temperature of compartment air drawn from the
aspirator into a resistance value. It is then input into the auto ampli-
fier.
RHA946F
Aspirator
The aspirator is located in front of heater unit. It produces vacuum
pressure due to air discharged from the heater unit, continuously
taking compartment air in the aspirator.
RHA482A
GI
MA
EM
LC
EC
FE
AT
PD
FA
RA
BR
ST
RS
BT
EL
IDX
TROUBLE DIAGNOSES
HA-93
RHA956F
DIAGNOSTIC PROCEDURE
SYMPTOM: In-vehicle sensor circuit is open or shorted. (
or
−
appears on the display as a result of conducting Self-di-
agnosis STEP 2.)
RHA904F
SHA836E
RHA905F
CHECK IN-VEHICLE SENSOR CIRCUIT
BETWEEN IN-VEHICLE SENSOR AND
AUTO AMP.
Disconnect in-vehicle sensor harness con-
nector.
Do approx. 5 volts exist between in-vehicle
sensor harness terminal No.
q
3
and body
ground?
Yes
E
No
Disconnect auto amp. har-
ness connector.
Note
Check circuit continuity
between in-vehicle sensor
harness terminal No.
q
3
and auto amp. harness ter-
minal No.
q
3
.
Continuity should exist.
If OK, check harness for
short.
OK
Disconnect auto amp. harness connector.
Replace auto amp.
Note
Check circuit continuity between in-vehicle
sensor harness terminal No.
q
9
and auto
amp. harness terminal No.
q
9
.
Continuity should exist.
If OK, check harness for short.
OK
CHECK IN-VEHICLE SENSOR.
(Refer to HA-95.)
OK
E
NG
Replace in-vehicle sensor.
Replace auto amp.
Note:
If the result is NG or No after checking circuit continuity, repair harness
or connector.
TROUBLE DIAGNOSES
In-vehicle Sensor Circuit (Cont’d)
H
H
H
H
H
H
HA-94
RHA934F
COMPONENT INSPECTION
In-vehicle sensor
After disconnecting in-vehicle sensor harness connector, measure
resistance between terminals
q
3
and
q
9
at sensor harness side,
using the table below.
Temperature °C (°F)
Resistance k
Ω
−35 (−31)
38.35
−30 (−22)
28.62
−25 (−13)
21.61
−20 (−4)
16.50
−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
50 (122)
0.91
55 (131)
0.77
60 (140)
0.66
65 (149)
0.57
GI
MA
EM
LC
EC
FE
AT
PD
FA
RA
BR
ST
RS
BT
EL
IDX
TROUBLE DIAGNOSES
In-vehicle Sensor Circuit (Cont’d)
HA-95
RHA970F
Intake Sensor Circuit
COMPONENT DESCRIPTION
The intake sensor is located on the cooling unit. It converts tem-
perature of air after it passes through the evaporator into a resis-
tance value. The value is then input to the auto amplifier.
RHA957F
DIAGNOSTIC PROCEDURE
SYMPTOM: Intake sensor circuit is open or shorted. (
or
−
appears on the display as a result of conducting Self-di-
agnosis STEP 2.)
RHA906F
RHA907F
RHA908F
CHECK INTAKE SENSOR CIRCUIT
BETWEEN INTAKE SENSOR AND AUTO
AMP.
Disconnect intake sensor harness connec-
tor.
Do approx. 5 volts exist between intake
sensor harness terminal No.
q
1
and body
ground?
Yes
E
No
Disconnect auto amp. har-
ness connector.
Note
Check circuit continuity
between intake sensor har-
ness terminal No.
q
1
and
auto amp. harness terminal
No.
q
1
.
Continuity should exist.
If OK, check harness for
short.
OK
Disconnect auto amp. harness connector.
Replace auto amp.
Note
Check circuit continuity between intake
sensor harness terminal No.
q
9
and auto
amp. harness terminal No.
q
9
.
Continuity should exist.
If OK, check harness for short.
OK
CHECK INTAKE SENSOR.
(Refer to HA-97.)
OK
E
NG
Replace intake sensor.
Replace auto amp.
Note:
If the result is NG or No after checking circuit continuity, repair harness
or connector.
TROUBLE DIAGNOSES
H
H
H
H
H
H
HA-96
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст