ABS – TroubleshootingABS – 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
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