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ABS <2WD> -
Troubleshooting
35B-10
Code No.15 Wheel speed sensor (abnormal output signal) Probable cause
This code is output when there is an abnormality in the output signal from any one
of the four wheel speed sensors while driving (except for an open circuit or short
circuit).
D The four vehicle tires are of different sizes
D Improper installation of wheel speed sensor
D Malfunction of wheel speed sensor
D Malfunction of wiring harness or connector
D Malfunction of ABS rotor
D Malfunction of wheel bearing
D Malfunction of hydraulic unit
NG
Replace the hydraulic unit.
NG
Repair
NG
Replace
NG
Replace
NG
Check the harness wire, and repair if necessary.
D Between each wheel speed sensor and ABS-ECU
OK
Wheel bearing check (Refer to GROUP 26 and GROUP 27 -
On-vehicle Service.)
OK
ABS rotor check (Refer to P.35B-29.)
OK
Check the trouble symp-
tom.
OK
Check the following connector:
A-04
OK
Wheel speed sensor output voltage check (Refer to P.35B-19.)
NG
Wheel speed sensor check (Refer to P.35B-29.)
NG
Wheel speed sensor installation check
NG
Repair
YES
Check the trouble symptom.
Are the sizes of all four tires identical?
NO
Equip the vehicle with tires of identical sizes.
Code No.16 ABS-ECU power supply system (abnormal
voltage drop or rise)
Probable cause
This code is output if the ABS-ECU power supply voltage drops below or rises above
the rated values.
Furthermore, if the voltage returns to normal, this code is no longer output.
D Malfunction of battery
D Malfunction of wiring harness or connector
D Malfunction of hydraulic unit
Caution
If battery voltage drops or rises during inspection, this code will be output as well. If the voltage
returns to standard value, this code is no longer output.
Before carrying out the following inspection, check the battery level, and refill it if necessary.
NG
Repair
NG
Replace the hydraulic unit.
NG
Repair
NG
Check the harness wire, and repair if necessary.
D Between ignition switch and ABS-ECU
OK
Check the trouble symp-
tom.
OK
Check the battery.
OK
Check the trouble symp-
tom.
OK
Check the following connector:
A-04
Measure at the ABS-ECU connector A-04.
D Disconnect the connector, and measure at the harness side
connector.
D Start the engine. Voltage between 4 and body earth
OK:
Battery voltage
NG
Check the following connectors:
A-04, C-75, C-66 <L.H. drive vehicles>, C-134, C-131