REAR AXLE – Troubleshooting <AYC>
27-18
Code No. 81: AYC relay system Probable cause
This code is output when the coil circuit of the AYC relay is open- or short-circuited. D Defective AYC relay
D Defective harness or connector
D Defective AYC-ECU
NG
Check and repair the harness between
AYC relay and body ground.
OK
Check the trouble symptom.
OK
Replace AYC-ECU.
NG
Check the harness between AYC relay
and AYC-ECU.
NG
Repair
NG
Check the trouble symptom.
OK
Check the following connectors:
B-96, B-126
NG
Repair
OK
Measure at A-126 AYC relay connec-
tor.
D Disconnect the connector and
measure at the harness side.
D Continuity across 1 and body
ground
OK: Conducting
NG
Check the following connector:
A-126
NG
Repair
Check the AYC relay.
(Refer to P.27-52.)
NG
Replace the AYC relay.
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