NO.3 BRAKE SYSTEM WARNING LIGHT DOES NOT ILLUMINATE WITH SWITCH THE IGNITION TO ON [ABS]
id0403a5950500
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3 |
Brake system warning light does not illuminate with switch the ignition to ON |
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Possible cause
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• Instrument cluster malfunction
• Communication error between ABS HU/CM and instrument cluster
• ABS CM internal malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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CONFIRM ABS HU/CM DTC
• Retrieve the ABS HU/CM DTC using the M-MDS.
(See ON-BOARD DIAGNOSIS [ABS].)
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS [ABS].)
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No
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Go to the next step.
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2
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CONFIRM INSTRUMENT CLUSTER DTC
• Retrieve the instrument cluster DTC using the M-MDS.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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Go to the next step.
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3
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INSPECT WHETHER MALFUNCTION IS IN ABS HU/CM OR INSTRUMENT CLUSTER
• Turn on all the warning light and indicator light using the M-MDS simulation function WL+IL.
• Does the ABS warning light illuminate?
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Yes
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Replace the ABS CM (ABS CM internal malfunction).
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No
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Replace the instrument cluster.
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