REAR AXLE –
Troubleshooting <AYC>
27-13
Code No. 41: TPS system
Probable cause
This code is output when the input from the throttle position sensor falls short of
0.2 V.
D
Defective TPS
D
Defective harness or connector
D
Defective AYC-ECU
OK
Replace AYC-ECU.
NG
Check and repair the harness between
AYC-ECU and TPS.
OK
Check the trouble symptom.
NO
Measure at B-95 AYC-ECU connector.
D
Connector connected.
D
Ignition switch: ON
D
Voltage across 18 and body ground
D
Fully open the throttle valve.
OK: 4.5 – 5.0 V
NG
Check the following connector:
B-95
Is the MPI diagnosis code No. 14 out-
put?
YES
Refer to GROUP 13 TROUBLE-
SHOOTING.
NG
Repair
Code No. 51: Longitudinal acceleration sensor system
Probable cause
Code No. 56: Lateral acceleration sensor system
This code is output when the output from the acceleration sensor becomes 0.5 V
or less or 4.5 V or more.
D
Defective longitudinal acceleration sensor
D
Defective lateral acceleration sensor
D
Defective harness or connector
D
Defective AYC-ECU
NG
Replace the acceleration sensor.
OK
Check the trouble symptom.
OK
Check and repair the harness between
acceleration sensor and ignition
switch.
OK
Check the trouble symptom.
NG
Check and repair the harness between
acceleration sensor and AYC-ECU.
NG
Replace AYC-ECU.
OK
Check the following connectors:
D-20, D-32
OK
Check the trouble symptom.
OK
Check the trouble symptom.
NG: 4.5 V or more
Check the acceleration sensor. (Refer
to P.27-54.)
NG
Replace
NG: 0.5 V or less
Check at D-20, D-32 acceleration sen-
sor connector.
D
Disconnect the connector and
measure at the harness side.
D
Ignition switch: ON
D
Voltage across 1 and body ground
OK: Battery voltage
NG
Check the following connectors:
D-20, D-32, B-49, B-75, B-76
NG
Check and repair the harness between
acceleration sensor and AYC-ECU.
NG
Measure at D-20, D-32 acceleration
sensor connector.
D
Connector connected.
D
Ignition switch: ON
D
Voltage across 2 and body ground
OK: 0.5 – 4.5 V
OK
Check the following connectors:
D-20, D-32
NG
Repair
Measure at B-95 AYC-ECU connector.
D
Connector connected.
D
Ignition switch: ON
D
Voltage across 1/3 and body
ground
OK: 0.5 – 4.5 V
OK
Check the following connector:
B-95
NG
Repair
Summary of Contents for Lancer Evolution IV
Page 1: ...Pub No S9806CNCP9 WORKSHOP MANUAL EVOLUTION IV EVOLUTION V...
Page 3: ...MODELS 2 00 1 GENERAL CONTENTS...
Page 40: ...LUBRICANTS 2 ENGINE OIL COOLER 2 12 1 ENGINE LUBRICATION CONTENTS...
Page 117: ...MANUAL TRANSMISSION 22A MANUAL TRANSMISSION OVERHAUL 22B 22 1 MANUAL TRANSMISSION CONTENTS...
Page 179: ...26 1 FRONT AXLE CONTENTS SERVICE SPECIFICATIONS 2 SPECIAL TOOLS 2 AXLE HUB AND KNUCKLE 3...
Page 237: ...ROLL STOPPER AND CENTERMEMBER 2 32 1 POWER PLANT MOUNT CONTENTS...
Page 265: ...BASIC BRAKE SYSTEM 35A ANTI LOCK BRAKING SYSTEM ABS 35B 35 1 SERVICE BRAKES CONTENTS...