Nissan Silvia. Manual — part 279
3
CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND COMPRESSOR
Check circuit continuity between A/C relay harness connector E5 terminal No. 3 (L/R) and compressor harness connector
F21 terminal No. 1 (L/R).
ZHA058H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK
©
GO TO 4.
NG
©
Repair harness or connector.
4
CHECK POWER SUPPLY FOR A/C RELAY
Disconnect A/C relay.
Are there approx. 12 volts between A/C relay harness connector E5 terminal No. 2 (L/OR), 5 (G/B) and body ground?
ZHA059H
Yes or No
Yes
©
GO TO 5.
No
©
Check power supply circuit and 10A (No. 19, 66) fuse at fuse block. Refer to EL-8,
“Wiring Diagram — POWER —”.
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-67
5
CHECK A/C RELAY AFTER DISCONNECTING IT
Refer to HA-75.
OK or NG
OK
©
Reconnect A/C relay. GO TO 6.
NG
©
Replace A/C relay.
6
CHECK COIL SIDE CIRCUIT OF A/C RELAY
Are there approx. 12 volts between ECM harness connector F1 terminal No. 11 (G) and body ground?
ZHA060H
Yes or No
Yes
©
GO TO 8.
No
©
Disconnect A/C relay. Disconnect ECM harness connector. GO TO 7.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-68
7
CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND ECM
Check circuit continuity between A/C relay harness connector E5 terminal No. 1 (G) and ECM harness connector F1 termi-
nal No. 11 (G).
ZHA061H
Continuity should exist.
OK or NG
OK
©
Check harness for short.
NG
©
Repair harness or connector.
8
CHECK VOLTAGE FOR ECM
Are there approx. 12 volts between ECM harness connector F1 terminal No. 41 (L/B) and body ground?
ZHA062H
Yes or No
Yes
©
GO TO 9.
No
©
Check ECM. Refer to EC-76, “Description”.
Repair harness or connector.
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-69
9
CHECK POWER SUPPLY FOR THERMO CONTROL AMP.
Are there approx. 12 volts between thermo control amp. harness connector M49 terminal No. 1 (L/OR) and body ground?
ZHA063H
Yes or No
Yes
©
GO TO 10.
No
©
Check power supply circuit and 10A (No. 15) fuse at fuse block. Refer to EL-11, “Igni-
tion Power Supply — Ignition SW. in “ON”.
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.
TROUBLE DIAGNOSES
Magnet Clutch (Cont’d)
HA-70
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