Mazda 3 manuals

Mazda 3 Service Manual: Discharge Headlight System Inspection

Mazda 3 Service Manual / Body / Lighting & Horn / Exterior / Discharge Headlight System Inspection

Discharge headlight inoperative

WARNING:

Terminal layout


Inspection procedure

STEP

INSPECTION

ACTION

1

INSPECT POWER SUPPLY CIRCUIT OF DISCHARGE HEADLIGHT CONTROL MODULE

  • Disconnect the negative battery cable..

  • Disconnect the discharge headlight control module connector.

  • Connect the negative battery cable..

  • Turn the light switch to the HEAD position.

  • Measure the voltage at discharge headlight control module connector (harness-side) terminal A.

  • Is the voltage approx. 12 V

    ?

Yes

Go to Step 6.

No

Go to the next step.

2

INSPECT FUSE

  • Turn the light 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

  • Remove the headlight relay (LO)..

  • Inspect the headlight relay (LO)..

  • Is the headlight relay (LO) normal?

Yes

Go to the next step.

No

Replace the headlight relay (LO)..

4

INSPECT LIGHT SWITCH

  • Inspect the light switch..

  • Is the light switch normal?

Yes

Go to the next step.

No

Replace the light switch..

5

INSPECT FOR OPEN OR SHORT CIRCUITS IN THE FOLLOWING WIRING HARNESSES BETWEEN BATTERY AND DISCHARGE HEADLIGHT CONTROL MODULE

  • Disconnect the negative battery cable..

  • Inspect for continuity between the following terminals:

    • Positive battery—headlight relay (LO) terminal D

    • H/L LO RH 15 A fuse—discharge headlight control module terminal A

    • H/L LO LH 15 A fuse—discharge headlight control module terminal A

  • Are the wiring harnesses normal?

Yes

Go to the next step.

No

Replace the related wiring harness.

6

INSPECT FOR OPEN OR SHORT CIRCUITS IN THE FOLLOWING WIRING HARNESS BETWEEN DISCHARGE HEADLIGHT CONTROL MODULE AND GROUND

  • Inspect the wiring harness between the discharge headlight control module 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 BULB OR DISCHARGE HEADLIGHT CONTROL MODULE

  • Install any other discharge headlight bulb..

  • Connect the discharge headlight control module connector.

  • Turn the light switch to the HEAD position.

  • Does the headlight (low-beam) illuminate?

Yes

Replace the discharge headlight bulb..

No

Replace the discharge headlight control module..


Discharge Headlight Service Warnings
Discharge Headlight Service Warnings To prevent electrical shock when replacing the discharge headlight bulb, always perform the servicing with dry hands and in an area where it does not ...

Front Combination Light Bracket Replacement
NOTE: Verify that the front combination light is not damaged before using the repair bracket for installation when the original brackets are damaged. If the front combination light compo ...

Other materials:

Overhead Lights
  With Map Lights Front   Rear   Without Map Lights   NOTE (With map lights) The rear overhead light also turn on and off when the front overhead light switch is operated. Map Lights * When the overhead light switch is in the door or off position, press the lens ...

Trunk Lid Opener Cable Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the following parts: a. Front seat (LH)(See FRONT SEAT REMOVAL/INSTALLATION.) b. Front scuff plate (LH). c. Rear scuff plate. d. B-pillar lower trim. e. Rear seat cushion. f. Rear seat back. g. Tire house trim (LH). h. Trunk end ...

Safety Practices
The way you drive has a great deal to do with your tire mileage and safety. So cultivate good driving habits for your own benefit. Observe posted speed limits and drive at speeds that are safe for the existing weather conditions Avoid fast starts, stops and turns Avoid potholes and o ...

© 2016-2019 Copyright www.mazda3tech.com