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:

Incorrect servicing of the discharge headlights could result in electrical shock. Before servicing the discharge headlights, always refer to the service warnings..

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.)
1		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.
2		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.
3		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.
4		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.
5		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.)
6		No	Replace the discharge headlight control module. (See DISCHARGE HEADLIGHT CONTROL MODULE REMOVAL/INSTALLATION.)

Discharge Headlight System

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