NO.3 BRAKE SYSTEM WARNING LIGHT DOES NOT ILLUMINATE WHEN THE IGNITION SWITCH IS TURNED TO THE ON POSITION [ABS]

id0403a5801900

3

Brake system warning light does not illuminate when the ignition switch is turned to the ON position

POSSIBLE CAUSE

•  Instrument cluster malfunction

•  Network communication for related system malfunction

•  ABS HU/CM malfunction

3	Brake system warning light does not illuminate when the ignition switch is turned to the ON position
POSSIBLE CAUSE	• Instrument cluster malfunction • Network communication for related system malfunction • ABS HU/CM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	CONFIRM DTC U1900 • Retrieve the DTC from the PCM, ABS and instrument cluster. (See ON-BOARD DIAGNOSTIC TEST [L8, LF].) (See ON-BOARD DIAGNOSIS [ABS].) (See DTC INSPECTION [INSTRUMENT CLUSTER].) • Is the DTC U1900 present?	Yes	Go to the next step.
1		No	Inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION.) If the instrument cluster has a malfunction: • Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.) If the instrument cluster is normal: • Go to the next step.
2	CONFIRM DTCS U0121, U0100 AND U0214 • Retrieve the DTC from the instrument cluster. (See DTC INSPECTION [INSTRUMENT CLUSTER].) • Is the DTC U0121, U0100 or U0214 present?	Yes	Replace the instrument cluster (open circuit in instrument cluster internal circuit). (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
2		No	Inspect the network communication for related system malfunction. Repair or replace the malfunctioning part according to the inspection results, if necessary.