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

Step

Inspection

Action

1

• 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 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

• 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

• 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

• 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

• 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.)