NO.1 ANY OF THE FOLLOWING LIGHTS ARE NOT ILLUMINATED WITH THE IGNITION SWITCHED ON: (ABS WARNING LIGHT AND/OR BRAKE SYSTEM WARNING LIGHT) [ANTILOCK BRAKE SYSTEM (ABS)]

1	Any of the following lights are not illuminated with the ignition switched ON: (ABS warning light and/or brake system warning light)
POSSIBLE CAUSE	• ABS HU/CM does not operate. • Communication error between ABS HU/CM and instrument cluster • Instrument cluster malfunction • ABS HU/CM internal malfunction

STEP	INSPECTION	ACTION
1	VERIFY IF MALFUNCTION IS IN WARNING LIGHTS OR COMMON POWER SUPPLY • Connect the M-MDS (IDS) to the DLC-2. • Turn on all warning lights and indicator lights using the instrument cluster PID WL+IL of active command modes. (See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].) • Are other warning and indicator lights illuminated?	Yes	Go to Step 5.
No	If communication error message is displayed on the M-MDS (IDS) screen: • Go to the next step. If communication error message is not displayed: • Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
2	INSPECT INSTRUMENT CLUSTER POWER SUPPLY FUSE • Inspect the instrument cluster ignition power supply fuse. • Is the fuse normal?	Yes	Go to the next step.
No	Inspect the blown fuse’s circuit for a short to ground. Repair or replace the wiring harness for a possible short to ground if necessary. Install appropriate amperage fuse.
^*3	VERIFY IF MALFUNCTION IS IN WIRING HARNESS (BETWEEN INSTRUMENT CLUSTER POWER SUPPLY AND INSTRUMENT CLUSTER FOR CONTINUITY) OR ELSEWHERE • Switch the ignition ON. • Measure the voltage at instrument cluster terminal S (wiring harness-side). • Is the voltage approx. 12 V?	Yes	Go to the next step.
No	Refer to the wiring diagram and verify whether or not there is a common connector between instrument cluster terminal S (wiring harness-side) and ignition switch. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit.
^*4	VERIFY IF MALFUNCTION IS IN WIRING HARNESS (BETWEEN INSTRUMENT CLUSTER AND GROUND FOR CONTINUITY) OR INSTRUMENT CLUSTER • Switch the ignition off. • Disconnect the instrument cluster connector. • Inspect for continuity between instrument cluster terminal K (wiring harness-side) and body ground. • Is there continuity?	Yes	Replace the instrument cluster. (Open circuit in the instrument cluster) (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness for a possible open circuit and poor contact at ground point.
5	CONFIRM ABS HU/CM DTC • Retrieve the ABS HU/CM DTC using the M-MDS (IDS). (See ON-BOARD DIAGNOSIS [ANTILOCK BRAKE SYSTEM (ABS)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [ANTILOCK BRAKE SYSTEM (ABS)].)
No	If a communication error message is displayed on the M-MDS (IDS) screen: • Go to the next step. If a communication error message is not displayed: • Go to Step 9.
6	INSPECT ABS HU/CM POWER SUPPLY FUSE • Inspect the ABS HU/CM ignition power supply fuse. • Is the fuse normal?	Yes	Go to the next step.
No	Inspect the blown fuse’s circuit for a short to ground. Repair or replace the wiring harness for a possible short to ground if necessary. Install appropriate amperage fuse.
^*7	VERIFY IF MALFUNCTION IS IN WIRING HARNESS (BETWEEN ABS HU/CM POWER SUPPLY AND ABS HU/CM FOR CONTINUITY) OR ELSEWHERE • Switch the ignition ON. • Measure the voltage at the ABS HU/CM terminal N (wiring harness-side). • Is the voltage approx. 12 V?	Yes	Go to the next step.
No	Inspect for an open circuit between the ABS HU/CM and ignition. Repair or replace the wiring harness for a possible open circuit if necessary.
^*8	VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN ABS HU/CM AND GROUND FOR CONTINUITY) OR ELSEWHERE • Switch the ignition off. • Disconnect the ABS HU/CM connector. • Inspect for continuity between ABS HU/CM terminal B (wiring harness-side) and body ground. • Is there continuity?	Yes	Replace the ABS HU/CM. (Open circuit in the ABS HU/CM) (See ABS HU/CM REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness for a possible open circuit and poor contact at ground point.
9	CONFIRM INSTRUMENT CLUSTER DTC • Retrieve the instrument cluster DTC using the M-MDS (IDS). (See DTC INSPECTION [INSTRUMENT CLUSTER].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [INSTRUMENT CLUSTER].)
No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

STEP

INSPECTION

ACTION

VERIFY IF MALFUNCTION IS IN WARNING LIGHTS OR COMMON POWER SUPPLY

• Connect the M-MDS (IDS) to the DLC-2.

• Turn on all warning lights and indicator lights using the instrument cluster PID WL+IL of active command modes.

(See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].)

• Are other warning and indicator lights illuminated?

Yes

Go to Step 5.

If communication error message is displayed on the M-MDS (IDS) screen:

• Go to the next step.

If communication error message is not displayed:

• Replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

INSPECT INSTRUMENT CLUSTER POWER SUPPLY FUSE

• Inspect the instrument cluster ignition power supply fuse.

• Is the fuse normal?

Yes

Go to the next step.

Inspect the blown fuse’s circuit for a short to ground.

Repair or replace the wiring harness for a possible short to ground if necessary.

Install appropriate amperage fuse.

^*3

VERIFY IF MALFUNCTION IS IN WIRING HARNESS (BETWEEN INSTRUMENT CLUSTER POWER SUPPLY AND INSTRUMENT CLUSTER FOR CONTINUITY) OR ELSEWHERE

• Switch the ignition ON.

• Measure the voltage at instrument cluster terminal S (wiring harness-side).

• Is the voltage approx. 12 V?

Yes

Go to the next step.

Refer to the wiring diagram and verify whether or not there is a common connector between instrument cluster terminal S (wiring harness-side) and ignition switch.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

^*4

VERIFY IF MALFUNCTION IS IN WIRING HARNESS (BETWEEN INSTRUMENT CLUSTER AND GROUND FOR CONTINUITY) OR INSTRUMENT CLUSTER

• Switch the ignition off.

• Disconnect the instrument cluster connector.

• Inspect for continuity between instrument cluster terminal K (wiring harness-side) and body ground.

• Is there continuity?

Yes

Replace the instrument cluster. (Open circuit in the instrument cluster)

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

Repair or replace the wiring harness for a possible open circuit and poor contact at ground point.

CONFIRM ABS HU/CM DTC

• Retrieve the ABS HU/CM DTC using the M-MDS (IDS).

(See ON-BOARD DIAGNOSIS [ANTILOCK BRAKE SYSTEM (ABS)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSIS [ANTILOCK BRAKE SYSTEM (ABS)].)

If a communication error message is displayed on the M-MDS (IDS) screen:

• Go to the next step.

If a communication error message is not displayed:

• Go to Step 9.

INSPECT ABS HU/CM POWER SUPPLY FUSE

• Inspect the ABS HU/CM ignition power supply fuse.

• Is the fuse normal?

Yes

Go to the next step.

Inspect the blown fuse’s circuit for a short to ground.

Repair or replace the wiring harness for a possible short to ground if necessary.

Install appropriate amperage fuse.

^*7

VERIFY IF MALFUNCTION IS IN WIRING HARNESS (BETWEEN ABS HU/CM POWER SUPPLY AND ABS HU/CM FOR CONTINUITY) OR ELSEWHERE

• Switch the ignition ON.

• Measure the voltage at the ABS HU/CM terminal N (wiring harness-side).

• Is the voltage approx. 12 V?

Yes

Go to the next step.

Inspect for an open circuit between the ABS HU/CM and ignition.

Repair or replace the wiring harness for a possible open circuit if necessary.

^*8

VERIFY WHETHER MALFUNCTION IS IN WIRING HARNESS (BETWEEN ABS HU/CM AND GROUND FOR CONTINUITY) OR ELSEWHERE

• Switch the ignition off.

• Disconnect the ABS HU/CM connector.

• Inspect for continuity between ABS HU/CM terminal B (wiring harness-side) and body ground.

• Is there continuity?

Yes

Replace the ABS HU/CM. (Open circuit in the ABS HU/CM)

(See ABS HU/CM REMOVAL/INSTALLATION.)

Repair or replace the wiring harness for a possible open circuit and poor contact at ground point.

CONFIRM INSTRUMENT CLUSTER DTC

• Retrieve the instrument cluster DTC using the M-MDS (IDS).

(See DTC INSPECTION [INSTRUMENT CLUSTER].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [INSTRUMENT CLUSTER].)

Replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, verify that connectors, terminals and wiring harnesses are connected correctly and undamaged.