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Mazda CX-5 Service & Repair Manual: Discharge Headlight Control Module

Mazda CX-5 Service & Repair Manual / Body / Lighting & Horn / Exterior / Discharge Headlight Control Module

Purpose

Function

Construction

Operation

1. When the headlight relay (LO) turns on, the discharge headlight control module raises the DC voltage from the battery from approx. 12 V to approx. 25,000 V using the igniter, and outputs it to the discharge headlight bulb.

2. After the discharge headlight is illuminated, the discharge headlight control module converts the DC voltage from the battery to AC voltage (approx. 42 V) using the inverter, and outputs it to the discharge headlight bulb.


Fail-safe


Operation condition

Fail-safe

Recovery condition

Input/output voltage from discharge headlight control module is outside of 6—18 V range.

(Except for voltage reduction directly after discharge headlight illumination)

Turns off discharge headlights

Normal input voltage detected

Malfunction is detected in output voltage from discharge headlight control module (open circuit or short to ground in wiring harness)

Turns off discharge headlights

Light switch turned to OFF, and then back to ON


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