
REAR AXLE –
Troubleshooting <AYC>
27-20
5. INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptom
Inspection
procedure No.
Ref. page
Communication between MUT-
II
and the whole system is not possible.
1
27-20
Communicatio between MUT-
II
and AYC-ECU is not possible.
2
27-21
AYC warning lamp does not light up when the ignition key is turned to “ON” (engine
stationary).
3
27-22
AYC warning lamp remains lit up after the engine has started.
4
27-23
AYC is inoperative.
Unable to start or accelerate on slippery road surfaces.
5
27-23
Rear tires are noisy during low-speed cornering.
Vehicle skews.
6
27-24
6. INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
Communication between MUT-
II
and the whole system is
not possible.
Probable cause
The cause may be a malfunction of the power supply circuit or the ground circuit
of the diagnosis connector.
D
Defective diagnosis connector
D
Defective harness or connector
NG
Check and repair the harness between
power supply and diagnosis connector.
OK
Check the trouble symptom.
NG
Check and repair the harness between
body ground and diagnosis connector.
OK
Check the trouble symptom.
OK
Replace MUT-
II
.
Check the following connectors:
B-22, B-50
NG
Repair
OK
Measure at B-22 diagnosis connector.
D
Disconnect the connector and
measure at the harness side.
D
Continuity across 4/5 and body
ground
OK: Conducting
NG
Measure at B-22 diagnosis combina-
tion meter connector.
D
Voltage across 16 and body ground
OK: System voltage
NG
Check the following connectors:
B-22, B-49, B-75, B-73
NG
Repair