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Mazda CX-5 Service & Repair Manual: Discharge Headlight System Inspection

Mazda CX-5 Service & Repair Manual / Body / Lighting & Horn / Exterior / Discharge Headlight System Inspection

WARNING:

Terminal layout


Inspection procedure

Step

Inspection

Action

1

INSPECT RELAY

  • Disconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0].)

  • Remove the following relays:

    (See RELAY LOCATION.)

    • Headlight LO relay (LH)

    • Headlight LO relay (RH)

  • Inspect the relays.

    (See RELAY INSPECTION.)

  • Are the relays normal?

Yes

Install the relays, then go to the next step.

(See RELAY LOCATION.)

No

Replace the relay.

(See RELAY LOCATION.)

2

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.)

3

INSPECT DISCHARGE HEADLIGHT CONTROL MODULE CONNECTOR

  • Disconnect the discharge headlight control module connector.

  • Inspect the connector connection, connection condition or the terminal and verify that there is no damage, deformation, corrosion, or disconnection.

  • Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector.

4

INSPECT DISCHARGE HEADLIGHT CONTROL MODULE FOR OPEN CIRCUIT TO GROUND CIRCUIT

  • Verify that the discharge headlight control module is disconnected.

  • Inspect the wiring harness between discharge headlight control module B (wiring harness-side) and ground.

  • Is there continuity?

Yes

Go to the next step.

No

Repair or replace the wiring harness for an open circuit.

5

INSPECT DISCHARGE HEADLIGHT CONTROL MODULE POWER SUPPLY CIRCUIT

  • Verify that the discharge headlight control module connector is disconnected.

  • Reconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0].)

  • Turn the light switch to the HEAD position.

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

  • Is the voltage B+?

Yes

Turn the light switch to the OFF position, then go to the next step.

No

Inspect the HID L 15 A fuse and HID R 15 A fuse.

  • If a fuse is burnt out:

    • Repair or replace the wiring harness for a short to ground.

    • Replace the fuse.

  • If a fuse is burnt out:

    • Replace the fuse.

  • If the fuse is normal:

    • Repair or replace the wiring harness for an open circuit.

6

VERIFY IF HEADLIGHT HI/LO BULB IS BAD OR DISCHARGE HEADLIGHT CONTROL MODULE IS MALFUNCTIONING

  • Disconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0].)

  • Install a normal headlight HI/LO bulb.

    (See HEADLIGHT BULB REMOVAL/INSTALLATION.)

  • Make sure to reconnect the disconnected connectors.

  • Reconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0].)

  • Turn the light switch to the HEAD position.

  • Do the headlights LO illuminate?

Yes

Replace the headlight HI/LO bulb.

(See HEADLIGHT BULB REMOVAL/INSTALLATION.)

No

Replace the discharge headlight control module.

(See DISCHARGE HEADLIGHT CONTROL MODULE REMOVAL/INSTALLATION.)


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