Infiniti I30 (A33). Manual — part 536
4
CHECK SUNLOAD SENSOR CIRCUIT BETWEEN SUNLOAD SENSOR AND AUTO AMP. (LCU)
1. Disconnect auto amp. (LCU) harness connector.
2. Check circuit continuity between sunload sensor harness terminal No. 1 and auto amp. (LCU) harness terminal No. 12.
RHA484GC
Continuity should exist.
If OK, check harness for short.
OK or NG
OK
©
1. Replace auto amp.
2. Go to “FUNCTION CONFIRMATION PROCEDURE”, “Self-diagnosis”, HA-37 and per-
form self-diagnosis STEP 2.
Confirm that code No. 20 is displayed.
NG
©
Repair harness or connector.
RHA416H
COMPONENT INSPECTION
NHHA0224
Sunload Sensor
NHHA0224S01
Measure voltage between auto amp. terminal 12 and body ground.
If NG, replace sunload sensor.
I
When checking sunload sensor, select a place where sun
shines directly on it.
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Sunload Sensor Circuit (Cont’d)
HA-103
SHA930E
RHA584E
Intake Sensor Circuit
COMPONENT DESCRIPTION
NHHA0225
Intake Sensor
NHHA0225S01
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 which is then input to the auto amp.
After disconnecting intake sensor harness connector, measure
resistance between terminals 1 and 2 at sensor harness side, using
the table below.
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
If NG, replace intake sensor.
TROUBLE DIAGNOSES
Sunload Sensor Circuit (Cont’d)
HA-104
RHA056GA
DIAGNOSTIC PROCEDURE
NHHA0226
SYMPTOM: Intake sensor circuit is open or shorted. (
or
−
is indicated on the display as a result of conducting
Self-diagnosis STEP 2.)
1
CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND BODY GROUND
Disconnect intake sensor harness connector.
Do approx. 5 volts exist between intake sensor harness terminal No. 1 and body ground?
RHA417H
Yes or No
Yes
©
GO TO 2.
No
©
GO TO 4.
2
CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND AUTO AMP. (LCU)
1. Disconnect auto amp. (LCU) harness connector.
2. Check circuit continuity between intake sensor harness terminal No. 2 and auto amp. (LCU) harness terminal No. 11.
RHA418H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK
©
GO TO 3.
NG
©
Repair harness or connector.
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Intake Sensor Circuit (Cont’d)
HA-105
3
CHECK INTAKE SENSOR
Refer to HA-104.
OK or NG
OK
©
1. Replace auto amp.
2. Go to “FUNCTION CONFIRMATION PROCEDURE”, “Self-diagnosis”, HA-37 and per-
form self-diagnosis STEP 2.
Confirm that code No. 20 is displayed.
NG
©
1. Replace intake sensor.
2. Go to “FUNCTION CONFIRMATION PROCEDURE”, “Self-diagnosis”, HA-37 and per-
form self-diagnosis STEP 2.
Confirm that code No. 20 is displayed.
4
CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND AUTO AMP. (LCU)
1. Disconnect auto amp. (LCU) harness connector.
2. Check circuit continuity between intake sensor harness terminal No. 1 and auto amp. (LCU) harness terminal No. 1.
RHA419H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK
©
1. Replace auto amp.
2. Go to “FUNCTION CONFIRMATION PROCEDURE”, “Self-diagnosis”, HA-37 and per-
form self-diagnosis STEP 2.
Confirm that code No. 20 is displayed.
NG
©
Repair harness or connector.
Air Mix Door Motor PBR Circuit
DIAGNOSTIC PROCEDURE
NHHA0227
For description of air mix door motor, mode door motor and intake
door motor circuit, refer to HA-61.
SYMPTOM: If PBR circuit is open or shorted. (−
or
is
indicated on the display as a result of conducting Self-diag-
nosis STEP 2.)
Perform diagnostic procedure for air mix door motor, mode
door motor and intake. Refer to HA-55.
TROUBLE DIAGNOSES
Intake Sensor Circuit (Cont’d)
HA-106
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