NO.1 NEITHER ABS WARNING LIGHT NOR BRAKE SYSTEM WARNING LIGHT ILLUMINATE WHEN IGNITION SWITCH TURNED TO ON POSITION [ABS]

id0403a5161600

1	Neither ABS warning light nor brake system warning light illuminate when ignition switch turned to ON position
POSSIBLE CAUSE	•  Instrument cluster power supply fuse malfunction ―  Short to ground in instrument cluster power supply fuse circuit ―  Instrument cluster power supply fuse malfunction •  Open circuit in instrument cluster ground circuit •  Instrument cluster malfunction •  Network communication for related system malfunction •  Improper configuration of instrument cluster •  ABS HU/CM malfunction

STEP	INSPECTION		ACTION
1	VERIFY WHETHER MALFUNCTION IS IN COMMON POWER SUPPLY OF WARNING LIGHTS AND INDICATOR LIGHTS, OR IN OTHER WARNING LIGHTS AND INDICATOR LIGHTS •  Verify other warning and indicator lights illuminate when the ignition switch is turned to the ON position? •  Is there any warning and indicator light?	Yes	Go to Step 4.
		No	Go to the next step.
2	INSPECT INSTRUMENT CLUSTER POWER SUPPLY FUSE •  Inspect the instrument cluster power supply fuse. •  Is there any malfunction?	Yes	Inspect the blown fuse related wiring harness for short to ground. Repair or replace the wiring harness for a possible short to ground, if necessary. Install the appropriate amperage fuse.
		No	Go to the next step.
*3	VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (INSPECT FOR CONTINUITY BETWEEN INSTRUMENT CLUSTER POWER SUPPLY AND INSTRUMENT CLUSTER) OR INSTRUMENT CLUSTER •  Turn the ignition switch to the ON position (engine off). •  Measure the voltage at instrument cluster terminal 1G (wiring harness-side). •  Is the voltage approx. 12 V?	Yes	Replace the instrument cluster (open circuit in instrument cluster internal circuit). (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
		No	Inspect the wiring harness between the instrument cluster and body ground for open circuit. Repair or replace the wiring harness for a possible open circuit, if necessary.
4	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.
		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 Step 6.
5	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). (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
		No	Inspect the network communication for related system malfunction. Repair or replace the malfunctioning part according to the inspection results, if necessary.
6	CONFIRM DTC B2477 •  Retrieve the DTC from the instrument cluster. (See DTC INSPECTION [INSTRUMENT CLUSTER].) •  Is the DTC B2477 present?	Yes	Perform the instrument cluster configuration. (See INSTRUMENT CLUSTER CONFIGURATION.)
		No	Replace the ABS HU/CM. (See ABS HU/CM REMOVAL/INSTALLATION.)