Nissan Silvia. Instruction — part 278
DIAGNOSTIC PROCEDURE
=NMHA0277
SYMPTOM:
I
Bi-level door motor does not operate normally.
1
CHECK POWER SUPPLY FOR A/C CONTROL UNIT
Refer to “MAIN POWER SUPPLY AND GROUND CIRCUIT CHECK”, HA-31.
OK or NG
OK
©
GO TO 2.
NG
©
Repair or replace.
2
CHECK FOR OUTPUT OF A/C CONTROL UNIT
Are there approx. 12 volts between bi-level door motor harness connector M29 terminal No.1 (R/B), 2 (R/Y) and body
ground.
ZHA053H
OK or NG
OK
©
Disconnect bi-level door motor connector. GO TO 3.
NG
©
Replace auto amp.
3
CHECK CIRCUIT CONTINUITY BETWEEN BI-LEVEL DOOR AND A/C CONTROL UNIT
Check circuit continuity between bi-level door motor harness connector M29 terminal No. 1 (R/B), 2 (R/Y) and A/C control
unit harness connector M31 terminal No. 11 (R/Y), 12 (R/B).
ZHA054H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK
©
Replace bi-level door motor.
NG
©
Replace harness or connector.
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Bi-Level Door (Cont’d)
HA-63
ZHA055H
CONTROL LINKAGE ADJUSTMENT
NMHA0278
Bi-Level Door
NMHA0278S01
1.
Install bi-level door motor on heater unit and connector it to
main harness.
Make sure lever of bi-level door motor is fitted into the slit of
bi-level door link.
2.
Turn ignition switch to ON.
3.
Turn vent switch ON.
4.
Turn BI-LEVEL switch ON. Check that slide link operates at the
full open position.
Also turn BI-LEVEL switch ON to check that slide link operates
at the fully-open position.
TROUBLE DIAGNOSES
Bi-Level Door (Cont’d)
HA-64
Magnet Clutch
TROUBLE DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH
=NMHA0119
Symptom:
I
Magnet clutch does not operate when A/C switch and fan switch are ON.
Inspection Flow
ZHA056H
*5: EM-16
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Magnet Clutch
HA-65
DIAGNOSTIC PROCEDURE
=NMHA0091
SYMPTOM:
I
Magnet clutch does not engage when A/C switch and fan
switch are ON.
1
CHECK POWER SUPPLY FOR COMPRESSOR
1. Disconnect compressor harness connector.
2. Are there approx. 12 volts between compressor harness connector F21 terminal No. 1 (L/R) and body ground?
ZHA057H
Yes or No
Yes
©
GO TO 2.
No
©
Disconnect A/C relay. GO TO 3.
2
CHECK MAGNET CLUTCH COIL
OK or NG
OK
©
Refer to STEP 6 in HA-65.
NG
©
Replace magnet clutch. Refer to HA-82.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-66
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