Infiniti I30 (A33). Manual — part 529
Magnet Clutch
TROUBLE DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH
=NHHA0201
SYMPTOM:
I
Magnet clutch does not engage.
INSPECTION FLOW
RHA951H
*1: FUNCTION CONFIRMATION
PROCEDURE (HA-37)
*2: HA-93
*3: HA-97
*4: HA-100
*5: HA-106
*6: FUNCTION CONFIRMATION
PROCEDURE (HA-37), see No.
13.
*10: HA-37
*11: HA-47
*12: HA-46
*13: HA-104
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Magnet Clutch
HA-75
RHA094GB
SYSTEM DESCRIPTION
=NHHA0202
Auto amplifier controls compressor operation by ambient tempera-
ture and signal from ECM.
Low Temperature Protection Control
NHHA0202S01
Auto amplifier will turn the compressor “ON” or “OFF” as deter-
mined by a signal detected by ambient sensor.
When ambient temperatures are greater than −2°C (28°F), the
compressor turns “ON”. The compressor turns “OFF” when ambi-
ent temperatures are less than −5°C (23°F).
RHA399H
DIAGNOSTIC PROCEDURE
NHHA0203
SYMPTOM: Magnet clutch does not engage when AUTO
switch is ON.
1
CHECK POWER SUPPLY FOR COMPRESSOR
Disconnect compressor harness connector. Do approx. 12 volts exist between compressor harness terminal No. 1 and
body ground?
RHA096GC
Yes or No
Yes
©
Check magnet clutch coil.
1. If NG, replace magnet clutch. Refer to HA-112.
2. Go to “FUNCTION CONFIRMATION PROCEDURE”, “Self-diagnosis”, HA-37 and per-
form self-diagnosis STEP 4.
Confirm that magnet clutch operation is normal.
No
©
Disconnect A/C relay. And GO TO 2.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-76
2
CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND COMPRESSOR
Check circuit continuity between A/C relay harness terminal No. 3 and compressor harness terminal No. 1.
RHA400H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK
©
GO TO 3.
NG
©
Repair harness or connector.
3
CHECK POWER SUPPLY FOR A/C RELAY
Disconnect A/C relay.
Do approx. 12 volts exist between A/C relay harness terminal Nos. 1, 5 and body ground?
RHA401H
Yes or No
Yes
©
GO TO 4.
No
©
Check power supply circuit and 10A (Nos. 19, 66) fuse at fuse block.
Refer to EL-11, EL-15, “Wiring Diagram — POWER —”.
I
If OK, check for open circuit in wiring harness.
Repair or replace as necessary.
I
If NG, replace fuse and check wiring harness for short circuit.
Repair or replace as necessary.
4
CHECK A/C RELAY AFTER DISCONNECTING IT
Refer to HA-80.
OK or NG
OK
©
Reconnect A/C relay. And GO TO 5.
NG
©
1. Replace A/C relay.
2. Go to “FUNCTION CONFIRMATION PROCEDURE”, “Self-diagnosis”, HA-37 and per-
form self-diagnosis STEP 4.
Confirm that magnet clutch operation is normal.
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-77
5
CHECK COIL SIDE CIRCUIT OF A/C RELAY
Do approx. 12 volts exist between ECM harness terminal No. 27 and body ground?
RHA482GF
Yes or No
Yes
©
GO TO 6.
No
©
Disconnect A/C relay.
Disconnect ECM harness connector.
GO TO 9.
6
CHECK VOLTAGE FOR ECM
Do approx. 12 volts exist between ECM harness terminal No. 45 and body ground?
RHA701FI
Yes or No
Yes
©
GO TO 7.
No
©
Check ECM. Refer to EC-132, “ECM Terminals and Reference Value”.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-78
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст