ABS –
Troubleshooting
ABS –
Troubleshooting
35B-6
Code No. 27: AYC monitor system (defective AYC)
Probable cause
This code is output when the AYC monitor signal becomes faulty.
D
Defective AYC-ECU
D
Defective ABS-ECU
D
Defective harness or connector
OK
Replace the ABS-ECU.
OK
MUT-
II
data list
AYC signal
OK
OFF to be displayed when the
engine runs at idle with the
vehicle stationary.
NG
Replace AYC-ECU.
OK
Check the harness between ABS-ECU
and AYC-ECU.
NG
Repair
Check the following connectors:
B-25, B-96
NG
Repair
Code No. 32: Acceleration sensor (longitudinal accelera-
tion) circuit system
Probable cause
This code is output under either of the following conditions:
D
The output from the acceleration sensor (longitudinal acceleration) becomes 0.5
V or less, or 4.5 V or more.
D
The acceleration sensor (longitudinal acceleration) harness is open- or
short-circuited.
D
Defective acceleration sensor (longitudinal accelera-
tion)
D
Defective harness or connector
D
Defective ABS-ECU
OK
Check the trouble symptom.
NG
Replace ABS-ECU.
OK
Check the trouble symptom.
NG
Check and repair the harness between
acceleration sensor (longitudinal
acceleration) and ABS-ECU.
OK
Check the trouble symptom.
NG
Check and repair the harness between
general-purpose fuse No. 6 and
acceleration sensor (longitudinal
acceleration).
OK
Replace ABS-ECU.
OK
Check the following connector:
B-24
NG
Repair
OK
Measure at B-24 ABS-ECU connector.
D
Connect the connector.
D
Ignition switch: ON
D
Voltage across 4 and 17
OK: 2.4 – 2.6 V
(horizontal position)
NG
Check the following connectors:
B-24, D-20, B-52
NG
Repair
NG
Check the harness between accelera-
tion sensor (longitudinal acceleration)
and ABS-ECU.
NG
Repair
OK
Check the trouble symptom.
OK
Check the valve relay.
NG
Replace
(1) NG
Check the following connectors:
D-20, B-49, B-75
NG
Repair
Check the following connector:
D-20, B-49, B-75
NG
Repair
(2) NG
Measure at D-20 acceleration sensor
(longitudinal acceleration) connector.
D
Disconnect the connector and
measure at the harness side.
D
Ignition switch: ON
(1) Voltage across 1 and body ground
OK: Battery voltage
(2) Continuity across 3 and body
ground
OK: Conducting
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...