ABS (ANTI-LOCK BRAKE SYSTEM)
8-137
• If the ABS warning light does not come on, the ABS ECU is defective. Replace the hydraulic unit
assembly.
7. The hydraulic unit assembly is defective.
EAS1MC1029
[B-3] DIAGNOSIS USING THE FAULT CODES
Connect the test coupler adapter to the ABS test coupler, and then turn the main switch to “ON”.
Information for the fault codes from the ABS ECU is contained in the following table. Refer to this table
for troubleshooting.
Record all of the fault codes displayed and inspect the check points.
Fault code table
Fault
code No.
Symptom Check point
ABS_11*
ABS_25*
Front wheel sensor signal is not re-
ceived properly.
• Installation of the front wheel sensor
• Front wheel
• Front wheel sensor housing
• Front wheel sensor rotor
ABS_12
Rear wheel sensor signal is not re-
ceived properly.
• Installation of the rear wheel sensor
• Rear wheel
• Rear wheel sensor housing
• Rear wheel sensor rotor
ABS_13
ABS_26
Incorrect signal from the front wheel
sensor is detected.
• Installation of the front wheel sensor
• Front wheel
• Front wheel sensor housing
• Front wheel sensor rotor
• Hydraulic unit assembly
ABS_14
ABS_27
Incorrect signal from the rear wheel
sensor is detected.
• Installation of the rear wheel sensor
• Rear wheel
• Rear wheel sensor housing
• Rear wheel sensor rotor
• Hydraulic unit assembly
ABS_15
No continuity in the front wheel sensor
circuit.
• Continuity of the front wheel sensor circuit
• Wire harness (ABS circuit)
• Connection of the front wheel sensor cou-
pler and ABS ECU coupler
• Front wheel sensor
ABS_16
No continuity in the rear wheel sensor
circuit.
• Continuity of the rear wheel sensor circuit
• Wire harness (ABS circuit)
• Connection of the rear wheel sensor cou-
pler and ABS ECU coupler
• Rear wheel sensor
ABS_17
ABS_45
Missing pulses detected in the front
wheel sensor signal.
• Front wheel sensor rotor
• Front wheel sensor housing
• Front wheel
ABS_18
ABS_46
Missing pulses detected in the rear
wheel sensor signal.
• Rear wheel sensor rotor
• Rear wheel sensor housing
• Rear wheel
ABS_21
Hydraulic unit solenoid circuit is open
or short-circuited.
• Hydraulic unit assembly
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