Inspection Procedure 4
Inspection Procedure 5
Even after the engine is started, the ABS warning lamp remains
illuminated
Probable cause
A possible short-circuit in the ABS warning lamp illumination circuit
• Faulty combination meter
• Faulty ABS warning lamp circuit
• Faulty HECU
This trouble symptom is limited to cases where communication with the Hi-Scan (Pro) is possible (HECU power
supply is normal) and DTC is normal.
ABS does not operate
Probable cause
Brake operation varies depending on
driving conditions and road surface
conditions, so diagnosis can be difficult.
However, if a normal DTC is displayed,
carry out the following inspection.
• Improper installation of wheel speed
sensor
• Incorrect sensor harness contact
• Foreign material on wheel speed
sensor
• Faulty wheel speed sensor
• Faulty rotor
• Faulty wheel bearing
• Faulty HECU
• Faulty power source circuit
Page 10 of 24
24.04.2008
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