TROUBLE DIAGNOSES — Diagnostic Procedure 4 (Cont'd) — A/C relay checks
HA-76flowchartPin 42 = L/G compressor feed; pins 32/33 = L/OR ignition feed (33 only on non-Europe spec); pin 43 = G/Y from E.C.C.S. control unit (relay coil drive).
Diagnostic Procedure 4 (Cont'd)
Diagnostic Procedure 4 (Cont'd) — A/C relay branch
1
[C] CHECK A/C RELAY OPERATION. Do approx. 12 volts exist between A/C relay harness terminal No. 42 and body ground?
O.K.
Disconnect A/C relay harness connector.
Disconnect A/C relay harness connector.
[D] Check circuit continuity between A/C relay harness terminal No. 42 and compressor harness terminal No. 42.
N.G.
2
[E] CHECK POWER SUPPLY FOR A/C RELAY. Disconnect A/C relay. Do approx. 12 volts exist between A/C relay harness terminal No. 32, 33 and body ground?
N.G.
CHECK POWER SUPPLY CIRCUIT AND 10A FUSE AT FUSE BLOCK. (Refer to "POWER SUPPLY ROUTING" in EL section and A/C ELECTRICAL CIRCUIT.)
O.K.
3
CHECK A/C RELAY AFTER DISCONNECTING IT. (Refer to Electrical Components Inspection.)
N.G.
Replace A/C relay.
O.K.
4
Reconnect A/C relay.
5
[F] CHECK COIL SIDE CIRCUIT OF A/C RELAY. Do approx. 12 volts exist between E.C.C.S. control unit harness terminal No. 43 and body ground?
N.G.
(Go to next page.) — branch C (coil N.G.)
O.K.
6
(Go to next page.) — branch B (coil OK)
NOTE
If the result is N.G. after checking circuit continuity, repair harness or connector.