Infiniti Q45. Manual — part 129
TROUBLE DIAGNOSIS
ATC-111
C
D
E
F
G
H
I
K
L
M
A
B
ATC
2.
CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect auto amp. connector.
3.
Check continuity between ambient sensor harness connector
E58 terminal 2 and auto amp. harness connector M119 terminal
11.
OK or NG
OK
>> GO TO 3.
NG
>> Repair harness or connector.
3.
CHECK AMBIENT SENSOR
Refer to
OK or NG
OK
>> 1. Replace auto amp.
2. Go to self-diagnosis
ATC-54, "FUNCTION CONFIRMATION PROCEDURE"
and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG
>> 1. Replace ambient sensor.
2. Go to self-diagnosis
ATC-54, "FUNCTION CONFIRMATION PROCEDURE"
and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
4.
CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect auto amp. connector.
3.
Check continuity between ambient sensor harness connector
E58 terminal 1 and auto amp. harness connector M119 terminal
2.
4.
Check continuity between auto amp. harness connector M119
terminal 2 and ground.
OK or NG
OK
>> 1. Replace auto amp.
2. Go to self-diagnosis
ATC-54, "FUNCTION CONFIRMATION PROCEDURE"
and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG
>> Repair harness or connector.
2 – 11
: Continuity should exist.
RJIA3057E
1 – 2
: Continuity should exist.
2 – Ground
: Continuity should not exist.
RJIA3058E
ATC-112
TROUBLE DIAGNOSIS
COMPONENT INSPECTION
Ambient Sensor
After disconnecting ambient sensor connector E58, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.
If NG, replace ambient sensor.
In-Vehicle Sensor Circuit
NJS0008W
COMPONENT DESCRIPTION
In-vehicle Sensor
The in-vehicle sensor is located on instrument lower driver panel. It
converts variations in temperature of compartment air drawn from
the aspirator into a resistance value. It is then input into the auto
amp.
Aspirator
The aspirator is located on driver’s side of heater & cooling unit. It
produces vacuum pressure due to air discharged from the heater &
cooling unit, continuously taking compartment air in the aspirator.
Temperature
°
C (
°
F)
Resistance k
Ω
−
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
RJIA3202E
RJIA0248E
RJIA0249E
TROUBLE DIAGNOSIS
ATC-113
C
D
E
F
G
H
I
K
L
M
A
B
ATC
DIAGNOSIS PROCEDURE FOR IN-VEHICLE SENSOR
SYMPTOM: In-vehicle sensor circuit is open or shorted. (22 or
−
22 is
indicated on auto amp. as a result of performing self-diagnosis
STEP-2.)
1.
CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND
1.
Disconnect in-vehicle sensor connector.
2.
Turn ignition switch ON.
3.
Check voltage between in-vehicle sensor harness connector
M68 terminal 2 and ground.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 4.
2.
CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect auto amp. connector.
3.
Check continuity between in-vehicle sensor harness connector
M68 terminal 1 and auto amp. harness connector M119 terminal
11.
OK or NG
OK
>> GO TO 3.
NG
>> Repair harness or connector.
RJIA1402E
RHA056GB
2 – Ground
: Approx. 5 V
RJIA3060E
1 – 11
: Continuity should exist.
RJIA3061E
ATC-114
TROUBLE DIAGNOSIS
3.
CHECK IN-VEHICLE SENSOR
Refer to
.
OK or NG
OK
>> 1. Replace auto amp.
2. Go to self-diagnosis
ATC-54, "FUNCTION CONFIRMATION PROCEDURE"
and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG
>> 1. Replace in-vehicle sensor.
2. Go to self-diagnosis
ATC-54, "FUNCTION CONFIRMATION PROCEDURE"
and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
4.
CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND AUTO AMP.
1.
Turn ignition switch OFF.
2.
Disconnect auto amp. connector.
3.
Check continuity between in-vehicle sensor harness connector
M68 terminal 2 and auto amp. harness connector M119 terminal
3.
4.
Check continuity between auto amp. harness connector M119
terminal 3 and ground.
OK or NG
OK
>> 1. Replace auto amp.
2. Go to self-diagnosis
ATC-54, "FUNCTION CONFIRMATION PROCEDURE"
and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG
>> Repair harness or connector.
COMPONENT INSPECTION
In-vehicle Sensor
After disconnecting in-vehicle sensor connector M68, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.
If NG, replace in-vehicle sensor.
2 – 3
: Continuity should exist.
3 – Ground
: Continuity should not exist.
RJIA3062E
Temperature
°
C (
°
F)
Resistance k
Ω
−
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
RJIA0253E
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