Mitsubishi Lancer Evolution IV, Workshop Manual

Page: 197 / 391

REAR AXLE –
Troubleshooting <AYC>
27-14
Code No. 52: Longitudinal acceleration sensor system Probable cause
This code is output when the longitudinal acceleration exceeds a predetermined value
while the vehicle is running with both ABS and brakes being inactive.
D
Defective longitudinal acceleration sensor
D
Defective harness or connector
D
Defective AYC-ECU
NG
Check and repair the harness between
longitudinal acceleration sensor and
AYC-ECU.
OK
Check the trouble symptom.
NG
Replace AYC-ECU.
OK
Check the trouble symptom.
OK
Check the following connector:
B-95
NG
Repair
OK
Measure at B-95 AYC-ECU connector.
D
Connector connected
D
Ignition switch: ON
D
Voltage across 3 and body ground
OK: 2.4 V to 2.6 V (where vehicle
in horizontal position)
NG
Check the following connectors:
B-95, B-52, D-20
Check the acceleration sensor.
(Refer to P.27-52.)
NG
Replace
NG
Repair
Code No. 61: Stop lamp switch system Probable cause
This code is output under either of the following conditions:
D
Stop lamp switch remains ON for 15 min. or more.
D
There is an open-circuit in the harness between AYC-ECU and stop lamp switch.
D
Defective stop lamp switch
D
Defective harness or connector
D
Defective AYC-ECU
NG
Replace AYC-ECU.
OK
Check the trouble symptom.
OK
Check the following connector:
B-95
NG
Repair
OK
Measure at the B-95 AYC-ECU con-
nector.
D
Disconnect the connector and
measure at the harness side.
D
Voltage across 11 and body ground
D
Brake pedal not depressed.
OK: 1 V or less
NG
Check and repair the harness between
AYC-ECU and stop lamp switch.
Check the stop lamp switch.
NG
Replace