SYMPTOM TROUBLESHOOTING [ANTILOCK BRAKE SYSTEM (ABS)]
id040308804200
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No. |
Symptom |
|---|---|
|
1
|
Any of the following lights are not illuminated when the ignition is switched ON:
• ABS warning light
• Brake system warning light
|
|
2
|
ABS warning light remains illuminated
|
|
3
|
Brake system warning light remains illuminated
|
|
4
|
A malfunction in the system even though the ABS warning light and brake system warning light are not illuminated
|
|
5
|
ABS operates frequently
|
|
Troubleshooting item |
1 |
2 |
3 |
4 |
5 |
|---|---|---|---|---|---|
|
Any of the following lights are not illuminated when the ignition is switched ON: • ABS warning light
• Brake system warning light
|
ABS warning light remains illuminated |
Brake system warning light remains illuminated |
A malfunction in the system even though the ABS warning light and brake system warning light are not illuminated |
ABS operates frequently |
|
|
ABS HU/CM does not operate
|
X
|
X
|
X
|
|
|
|
Communication error between ABS HU/CM and instrument cluster
|
X
|
X
|
X
|
|
|
|
ABS HU/CM internal malfunction
|
X
|
X
|
X
|
|
|
|
Instrument cluster malfunction
|
X
|
X
|
X
|
|
|
|
Brake fluid amount is low
|
|
|
X
|
|
|
|
ABS HU/CM detected malfunction (input and output device malfunction)
|
|
X
|
X
|
|
X
|
|
ABS HU/CM detects low voltage in power supply
|
|
X
|
X
|
|
|
|
ABS HU/CM ground malfunction
|
X
|
X
|
X
|
|
|
|
No connection at ABS HU/CM connector
|
|
X
|
X
|
|
|
|
Parking brake does not release
|
|
|
X
|
|
|
|
Parking brake switch or brake fluid level sensor stuck on
|
|
|
X
|
|
|
|
Short to ground in wiring harness between parking brake switch and instrument cluster
|
|
|
X
|
|
|
|
Short to ground in wiring harness between brake fluid level sensor and Body Control Module (BCM)
|
|
|
X
|
|
|
|
Mechanical malfunction in system
|
|
|
|
X
|
|
|
Incorrect ABS wheel-speed signal is inputted to ABS HU/CM
|
|
X
|
|
|
X
|
|
Difference in size, air pressure or wear conditions between front and rear tires
|
|
|
|
|
X
|
|
ABS HU/CM initial setting has not been performed after replacing ABS HU/CM
|
|
X
|
|
|
|
|
Input signal malfunction from instrument cluster (parking brake signal)
|
|
|
X
|
|
|
|
Communication error between ABS HU/CM and PCM
|
|
X
|
|
|
|