Nissan Frontier. Instruction — part 892
HAC-122
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
MAGNET CLUTCH
GO TO 8.
NO
>> Check 10A fuse (No. 42, located in IPDM E/R), and GO TO 12.
2.
CHECK BCM INPUT (A/C COMPRESSOR ON) SIGNAL
Check A/C compressor ON/OFF signal. Refer to
BCS-20, "AIR CONDITIONER : CONSULT Function (BCM -
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 8.
3.
CHECK REFRIGERANT PRESSURE SENSOR
Check refrigerant pressure sensor. Refer to
(VQ40DE).
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace refrigerant pressure sensor. Refer to
HA-36, "Removal and Installation"
4.
CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer to
BCS-20, "AIR CONDITIONER : CONSULT Function (BCM - AIR CONDI-
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 5.
5.
CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect BCM connector and front air control connector.
3. Check continuity between BCM harness connector M18 (A) ter-
minal 28 and front air control harness connector M50 (B) termi-
nal 5.
4. Check continuity between BCM harness connector M18 (A) ter-
minal 28 and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK VOLTAGE FOR FRONT AIR CONTROL (FAN ON SIGNAL)
A/C SW ON
: AIR COND SW ON
A/C SW OFF
: AIR COND SW OFF
BLOWER CONTROL DIAL
ON
: FAN ON SIG ON
BLOWER CONTROL DIAL
OFF
: FAN ON SIG OFF
A
B
Connector
Terminal Connector
Terminal
Continuity
BCM: M18
28
Front air control:
M50
5
Yes
Connector
Terminal
Ground
Continuity
BCM: M18
28
No
AWIIA0418ZZ
MAGNET CLUTCH
HAC-123
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
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1. Reconnect BCM connector and front air control connector.
2. Turn ignition switch ON.
3. Turn A/C switch ON.
4. Check voltage between front air control harness connector M50
terminal 5 and ground.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-49, "Removal and Installation"
NO-1 >> If the voltage is approx. 5V when blower motor is ON, replace front air control. Refer to
.
NO-2 >> If the voltage is approx. 0V when blower motor is OFF, replace BCM. Refer to
.
7.
CHECK CAN COMMUNICATION
Check CAN communication. Refer to
LAN-14, "Trouble Diagnosis Flow Chart"
.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Repair or replace malfunctioning part(s).
8.
CHECK VOLTAGE FOR FRONT AIR CONTROL (A/C COMPRESSOR ON SIGNAL)
1. Turn ignition switch ON.
2. Check voltage between front air control harness connector M50
terminal 4 and ground.
Is the inspection result normal?
YES
>> GO TO 9.
NO-1 >> If the voltage is approx. 5V when A/C switch is ON, replace front air control. Refer to
.
NO-2 >> If the voltage is approx. 0V when A/C switch is OFF, replace BCM. Refer to
.
9.
CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL
Terminals
Condition
Voltage
(Approx.)
(+)
(-)
Front air con-
trol connector
Terminal
No.
M50
5
Ground
A/C switch: ON
Blower motor
operates
0V
A/C switch: OFF
Battery voltage
AWIIA0419ZZ
Terminals
Condition
Voltage
(Approx.)
(+)
(-)
Front air
control con-
nector
Terminal No.
M50
4
Ground
A/C switch: ON
0V
A/C switch:
OFF
Battery voltage
AWIIA0417ZZ
HAC-124
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
MAGNET CLUTCH
1. Turn ignition switch OFF.
2. Disconnect BCM connector and front air control connector.
3. Check continuity between BCM harness connector M18 terminal
27 and front air control harness connector M50 terminal 4.
4. Check continuity between BCM harness connector M18 terminal
27 and ground.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Repair harness or connector.
10.
CHECK INTAKE SENSOR CIRCUITS
Check intake sensor. Refer to
HAC-126, "Intake Sensor Component Inspection"
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace intake sensor. Refer to
VTL-10, "Removal and Installation"
11.
CHECK CAN COMMUNICATION
Check CAN communication. Refer to
LAN-14, "Trouble Diagnosis Flow Chart"
.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-49, "Removal and Installation"
NO
>> Repair or replace malfunctioning part(s).
12.
CHECK MAGNET CLUTCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/C compressor connector.
3. Check for operation sound when applying battery voltage to A/C
compressor terminal 1.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Replace magnet clutch. Refer to
Installation for Compressor Clutch"
.
13.
CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND A/C COMPRESSOR
1. Disconnect IPDM E/R connector.
2. Check continuity between IPDM E/R harness connector E119
terminal 11 and A/C compressor harness connector F3 terminal
1.
3. Check continuity between IPDM E/R harness connector E119
terminal 11 and ground.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-28, "Removal and Installation of IPDM E/R"
.
NO
>> Repair harness or connector.
27 - 4
: Continuity should exist.
27 - ground
: Continuity should not exist.
AWIIA0416ZZ
WJIA1472E
11 – 1
: Continuity should exist.
11 – ground
: Continuity should not exist.
WJIA1470E
INTAKE SENSOR
HAC-125
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL A/C (TYPE 1)]
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INTAKE SENSOR
System Description
INFOID:0000000009478351
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor is located on top of the heater and cooling unit
assembly next to the A/C evaporator cover. It converts temperature
of air after it passes through the evaporator into a resistance value
which is then input to the front air control.
Intake Sensor Diagnosis Procedure
INFOID:0000000009478352
Regarding Wiring Diagram information, refer to
HAC-133, "Wiring Diagram - With Type 1"
.
DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR
SYMPTOM: Intake sensor circuit is open or shorted.
1.
CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND
1. Disconnect intake sensor connector.
2. Turn ignition switch ON.
3. Check voltage between intake sensor harness connector M146
terminal 2 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL
WJIA1155E
AWIIA0433GB
2 - Ground
: Approx. 5V
WJIA1278E
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