Infiniti G20 (P11). Manual — part 443
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RHA056GA
DIAGNOSTIC PROCEDURE
NCHA0106
SYMPTOM: Intake sensor circuit is open or shorted. (
or
−
is indicated on auto amp. 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. 2 and body ground?
RHA495GB
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.
Continuity should exist.
RHA496GB
OK or NG
OK
©
GO TO 3.
NG
©
Repair harness or connector.
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
AUTO
Intake Sensor Circuit (Cont’d)
HA-103
![](/vehicles/zatt/wheiso/zix/funthime.png)
3
CHECK INTAKE SENSOR
Refer to HA-102.
OK or NG
OK
©
1. Replace auto amp.
2. Go to self-diagnosis step-by-step procedure (HA-32) and perform self-diagnosis
STEP-2.
Confirm that code No. 20 is displayed.
NG
©
1. Replace intake sensor.
2. Go to self-diagnosis step-by-step procedure (HA-32) and perform self-diagnosis
STEP-2.
Confirm that code No. 20 is displayed.
4
CHECK INTAKE SENSOR CIRCUIT BETWEEN AMBIENT 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.
Continuity should exist.
RHA497GB
OK or NG
OK
©
1. Replace auto amp.
2. Go to self-diagnosis step-by-step procedure (HA-32) and perform self-diagnosis
STEP-2.
Confirm that code No. 20 is displayed.
NG
©
Repair harness or connector.
Air Mix Door Motor PBR Circuit
DIAGNOSTIC PROCEDURE
NCHA0050
For description of mode door motor and air mix door motor circuit,
refer to HA-50.
SYMPTOM: If PBR circuit is open or shorted. (−
or
is
indicated on auto amp. as a result of conducting Self-diagno-
sis STEP 2.)
Perform diagnostic procedure for mode door motor and air
mix door motor. Refer to HA-50.
TROUBLE DIAGNOSES
AUTO
Intake Sensor Circuit (Cont’d)
HA-104
![](/vehicles/zatt/wheiso/zix/jutheld.png)
HFC-134a (R-134a) Service Procedure
NCHA0070
SETTING OF SERVICE TOOLS AND EQUIPMENT
NCHA0070S01
Discharging Refrigerant
NCHA0070S0101
WARNING:
Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and
throat. Remove HFC-134a (R-134a) from A/C system using certified service equipment meeting require-
ments of SAE J2210 (R-134a recycling equipment) or J2209 (R-134a recovery equipment). If acciden-
tal system discharge occurs, ventilate work area before resuming service. Additional health and safety
information may be obtained from refrigerant and lubricant manufacturers.
SHA179FA
Evacuating System and Charging Refrigerant
NCHA0070S0102
SHA180FA
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
SERVICE PROCEDURE
AUTO
HFC-134a (R-134a) Service Procedure
HA-105
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