DISCHARGE HEADLIGHT SYSTEM INSPECTION

• Incorrect servicing of the discharge headlights could result in electrical shock. Before servicing the discharge headlights, always refer to the discharge headlight service warnings. (See RELAY INSPECTION [L3 Turbo].) (See RELAY INSPECTION [MZR-CD 2.2].) (See RELAY INSPECTION [L5].)

STEP	INSPECTION	ACTION
1	INSPECT POWER SUPPLY CIRCUIT OF DISCHARGE HEADLIGHT CONTROL MODULE • Disconnect the front combination light connector. • Turn the headlight switch to the HEADLIGHT (LO) position. • Measure the voltage at front combination light terminal A (wiring harness-side). • Is the voltage approx. 12 V?	Yes	Go to Step 6.
No	Go to the next step.
2	INSPECT FUSE • Turn the headlight switch to the OFF position. • Remove the H/L LO RH 15 A fuse or H/L LO LH 15 A fuse. • Inspect the fuses. • Are the fuses normal?	Yes	Go to the next step.
No	Replace the fuse.
3	INSPECT HEADLIGHT RELAY • Inspect the headlight relay. (See RELAY INSPECTION [L3 Turbo].) (See RELAY INSPECTION [MZR-CD 2.2].) (See RELAY INSPECTION [L5].) • Is the headlight relay normal?	Yes	Go to the next step.
No	Replace the headlight relay.
4	INSPECT LIGHT SWITCH • Inspect the light switch. (See LIGHT SWITCH INSPECTION.) • Is the light switch normal?	Yes	Go to the next step.
No	Replace the light switch. (See LIGHT SWITCH REMOVAL/INSTALLATION.)
5	INSPECT WIRING HARNESS BETWEEN BATTERY AND DISCHARGE HEADLIGHT CONTROL MODULE • Disconnect the negative battery cable. • Inspect for continuity between the following terminals: ― Battery (positive terminal) and headlight relay terminal D. ― H/L LO RH 15 A fuse and front combination light connector terminal A ― H/L LO LH 15 A fuse and front combination light connector terminal A • Are the wiring harnesses normal?	Yes	Go to the next step.
No	Replace the related wiring harness.
6	INSPECT WIRING HARNESS BETWEEN DISCHARGE HEADLIGHT CONTROL MODULE AND GROUND • Inspect the wiring harness between front combination light connector terminal B and ground for the following: ― Short to power supply ― Open circuit • Is the wiring harness normal?	Yes	Go to the next step.
No	Replace the related wiring harness.
7	VERIFY WHETHER MALFUNCTION IS IN DISCHARGE HEADLIGHT OR DISCHARGE HEADLIGHT CONTROL MODULE • Install the discharge headlight. (previously verified as illuminating normally). (See HEADLIGHT BULB REMOVAL/INSTALLATION.) • Connect the discharge headlight control module connector. • Turn the headlight switch to the HEADLIGHT (LO) position. • Does the headlight (low-beam) illuminate?	Yes	Replace the discharge headlight. (See HEADLIGHT BULB REMOVAL/INSTALLATION.)
No	Replace the discharge headlight control module. (See DISCHARGE HEADLIGHT CONTROL MODULE REMOVAL/INSTALLATION.)

STEP

INSPECTION

ACTION

INSPECT POWER SUPPLY CIRCUIT OF DISCHARGE HEADLIGHT CONTROL MODULE

• Disconnect the front combination light connector.

• Turn the headlight switch to the HEADLIGHT (LO) position.

• Measure the voltage at front combination light terminal A (wiring harness-side).

• Is the voltage approx. 12 V?

Yes

Go to Step 6.

Go to the next step.

INSPECT FUSE

• Turn the headlight switch to the OFF position.

• Remove the H/L LO RH 15 A fuse or H/L LO LH 15 A fuse.

• Inspect the fuses.

• Are the fuses normal?

Yes

Go to the next step.

Replace the fuse.

INSPECT HEADLIGHT RELAY

• Inspect the headlight relay. (See RELAY INSPECTION [L3 Turbo].) (See RELAY INSPECTION [MZR-CD 2.2].) (See RELAY INSPECTION [L5].)

• Is the headlight relay normal?

Yes

Go to the next step.

Replace the headlight relay.

INSPECT LIGHT SWITCH

• Inspect the light switch. (See LIGHT SWITCH INSPECTION.)

• Is the light switch normal?

Yes

Go to the next step.

Replace the light switch. (See LIGHT SWITCH REMOVAL/INSTALLATION.)

INSPECT WIRING HARNESS BETWEEN BATTERY AND DISCHARGE HEADLIGHT CONTROL MODULE

• Disconnect the negative battery cable.

• Inspect for continuity between the following terminals:

― Battery (positive terminal) and headlight relay terminal D.

― H/L LO RH 15 A fuse and front combination light connector terminal A

― H/L LO LH 15 A fuse and front combination light connector terminal A

• Are the wiring harnesses normal?

Yes

Go to the next step.

Replace the related wiring harness.

INSPECT WIRING HARNESS BETWEEN DISCHARGE HEADLIGHT CONTROL MODULE AND GROUND

• Inspect the wiring harness between front combination light connector terminal B and ground for the following:

― Short to power supply

― Open circuit

• Is the wiring harness normal?

Yes

Go to the next step.

Replace the related wiring harness.

VERIFY WHETHER MALFUNCTION IS IN DISCHARGE HEADLIGHT OR DISCHARGE HEADLIGHT CONTROL MODULE

• Install the discharge headlight. (previously verified as illuminating normally). (See HEADLIGHT BULB REMOVAL/INSTALLATION.)

• Connect the discharge headlight control module connector.

• Turn the headlight switch to the HEADLIGHT (LO) position.

• Does the headlight (low-beam) illuminate?

Yes

Replace the discharge headlight. (See HEADLIGHT BULB REMOVAL/INSTALLATION.)

Replace the discharge headlight control module. (See DISCHARGE HEADLIGHT CONTROL MODULE REMOVAL/INSTALLATION.)