Mitsubishi LANCER EVOLUTION-IV 1998 Workshop Manual page 380

27-14
Code No. 52: Longitudinal acceleration sensor system
This code is output when the longitudinal acceleration exceeds a predetermined value
while the vehicle is running with both ABS and brakes being inactive.
Check the acceleration sensor.
(Refer to P.27-52.)
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)
OK
Check the following connector:
B-95
OK
Check the trouble symptom.
NG
Replace AYC-ECU.
Code No. 61: Stop lamp switch system
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.
Check the stop lamp switch.
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
OK
Check the following connector:
B-95
OK
Check the trouble symptom.
NG
Replace AYC-ECU.
REAR AXLE –
Troubleshooting <AYC>
NG
Replace
NG
Check the following connectors:
B-95, B-52, D-20
Check the trouble symptom.
NG
Repair
Check and repair the harness between
longitudinal acceleration sensor and
AYC-ECU.
NG
Replace
NG
Check and repair the harness between
AYC-ECU and stop lamp switch.
NG
Repair
Probable cause
D Defective longitudinal acceleration sensor
D Defective harness or connector
D Defective AYC-ECU
NG
OK
NG
Probable cause
D Defective stop lamp switch
D Defective harness or connector
D Defective AYC-ECU
Repair