Infiniti F50. Manual — part 146
TROUBLE DIAGNOSIS
ATC-109
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 (R/Y) and auto amp. harness connector M119
terminal 11 (R/Y).
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 (G/R) and auto amp. harness connector M119
terminal 2 (G/R).
OK or NG
OK
>> 1. Replace auto amp.
2. Go to self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
NG
>> Repair harness or connector.
2 – 11
: Continuity should exist.
RJIA0245E
1 – 2
: Continuity should exist.
RJIA0246E
ATC-110
TROUBLE DIAGNOSIS
COMPONENT INSPECTION
Ambient Sensor
After disconnecting ambient sensor harness connector, measure
resistance between terminals 2 and 1 at sensor harness side, using
the table below.
If NG, replace ambient sensor.
In-Vehicle Sensor Circuit
EJS001YE
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.
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
RJIA0247E
RJIA0248E
RJIA0249E
TROUBLE DIAGNOSIS
ATC-111
C
D
E
F
G
H
I
K
L
M
A
B
ATC
DIAGNOSTIC 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 conducting 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 (LG/B) 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 (R/Y) and auto amp. harness connector M119
terminal 11 (R/Y).
OK or NG
OK
>> GO TO 3.
NG
>> Repair harness or connector.
RHA482A
RHA056GB
2 – Ground
: Approx. 5V
RJIA0250E
1 – 11
: Continuity should exist.
RJIA0251E
ATC-112
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
E68 terminal 2 (LG/B) and auto amp. harness connector M119
terminal 3 (LG/B).
OK or NG
OK
>> 1. Replace auto amp.
2. Go to self-diagnosis
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 harness connector, measure
resistance between terminals 1 and 2 at sensor harness side, using
the table below.
If NG, replace in-vehicle sensor.
2 – 3
: Continuity should exist.
RJIA0252E
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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