Nissan Silvia. Manual — part 272
2
CHECK POWER SUPPLY FOR BLOWER MOTOR
1. Disconnect blower motor harness connector.
2. Are there approx. 12 volts between blower motor harness connector M53 terminal No. 2 (L/W) and body ground?
ZHA032H
Yes or No
Yes
©
GO TO 3.
No
©
Check 15A (No. 19 and No. 24) fuses at fuse block. Refer to EL-11, “Wiring Diagram —
POWER —”.
Check blower relay.
3
CHECK CIRCUIT CONTINUITY FOR BLOWER MOTOR
1. Turn fan control switch to any position except OFF.
2. Check circuit continuity between blower motor harness connector M53 terminal No. 1 (L) and body ground.
ZHA033H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK
©
GO TO 4.
NG
©
Reconnect blower motor harness connector. GO TO 5.
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Blower Motor (Cont’d)
HA-39
4
CHECK BLOWER MOTOR
(Refer to Electrical Components Inspection.)
(HA-37)
OK or NG
OK
©
INSPECTION END
NG
©
Replace blower motor.
5
CHECK BLOWER MOTOR CIRCUIT BETWEEN BLOWER MOTOR AND RESISTOR
1. Disconnect resistor harness connector.
2. Are there approx. 12 volts between resistor harness connector M52 terminal No. 1 (L) and body ground?
ZHA034H
Yes or No
Yes
©
Disconnect fan switch harness connector. GO TO 7.
No
©
Disconnect blower motor and resistor harness connectors. GO TO 6.
TROUBLE DIAGNOSES
Blower Motor (Cont’d)
HA-40
6
CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND RESISTOR
Check circuit continuity between blower motor harness connector M53 terminal No. 1 (L) and resistor harness connector
M52 terminal No. 1 (L).
ZHA035H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK
©
GO TO 7.
NG
©
Repair harness or connector.
7
CHECK GROUND CIRCUIT FOR FAN SWITCH
Check circuit continuity between fan switch harness connector M33 terminal No. 6 (R/B) and body ground.
ZHA036H
OK or NG
OK
©
GO TO 8.
NG
©
Repair harness or connector.
8
CHECK RESISTOR AFTER DISCONNECTING IT
(Refer to Electrical Components Inspection.)
(HA-37)
OK or NG
OK
©
Reconnect resistor harness connector. GO TO 9.
NG
©
Replace resistor.
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Blower Motor (Cont’d)
HA-41
9
CHECK FAN SWITCH CIRCUIT
Are there approx. 12 volts between each fan switch harness connector M33 terminal No. 1 (L), 2 (L/R), 3 (G/R), 4 (L/B)
and body ground?
ZHA037H
Yes or No
Yes
©
GO TO 11.
No
©
GO TO 10.
10
CHECK CIRCUIT CONTINUITY BETWEEN FAN SWITCH AND RESISTOR
Check circuit continuity between fan switch harness connector M33 terminal No. 1 (L), 2 (L/R), 3 (G/R), 4 (L/B) and resis-
tor harness connector M52 terminal No. 1 (L), 2 (L/R), 3 (G/R), 4 (L/B).
ZHA038H
OK or NG
OK
©
Check harness for short.
NG
©
Repair harness or connector.
11
CHECK FAN SWITCH AFTER DISCONNECTING IT
(Refer to Electrical Components Inspection.)
(HA-37)
OK or NG
OK
©
INSPECTION END
NG
©
Replace fan switch.
TROUBLE DIAGNOSES
Blower Motor (Cont’d)
HA-42
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