FixVault
Home › Mazda › 2014 › 3 SV, Automatic Trans › Repair and Diagnosis › External Pages › Different car › Section 68 (Lighting System) › Discharge Headlight System Inspection › Inspection procedure

Inspection procedure

WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DISCHARGE HEADLIGHTS INSPECTION PROCEDURE

Step Inspection Action
1 INSPECT RELAY 
 Yes Install the relays, then go to the next step.
(See RELAY LOCATION .)
No Replace the malfunctioning relay.
(See RELAY LOCATION .)
2 INSPECT LIGHT SWITCH 
 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 engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
 Yes Go to the next step.
No Repair or replace the connector.
4 INSPECT FOR OPEN CIRCUIT IN DISCHARGE HEADLIGHT CONTROL MODULE GROUND CIRCUIT 
  • Verify that the discharge headlight control module connector is disconnected.
  • Inspect for continuity between discharge headlight control module terminal C (wiring harness-side) and body ground.
  • Is there continuity?
 Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between discharge headlight control module terminal C and body ground.
If there is a common connector: 
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
  • Repair or replace the malfunctioning part.

If there is no common connector: 
  • Repair or replace the wiring harness which has 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 2.5] .)

  • Turn the light switch to the HEAD position.
  • Measure the voltage at discharge headlight control module terminal B (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 the fuse is burnt out:
    • Refer to the wiring diagram and verify whether or not there is a common connector between HID L 15 A fuse or HID R 15 A fuse and discharge headlight control module terminal B.

      If there is a common connector: 

      • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
      • Repair or replace the malfunctioning part.

      If there is no common connector: 

      • Repair or replace the wiring harness which has a short to ground.
      • Replace the fuse.
  • If the fuse is damaged:
    • Replace the fuse.
  • If the fuse is normal:
    • Refer to the wiring diagram and verify whether or not there is a common connector between battery positive terminal and discharge headlight control module terminal B.

      If there is a common connector: 

      • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
      • Repair or replace the malfunctioning part.

      If there is no common connector: 

      • Repair or replace the wiring harness which has an open circuit.
6 VERIFY IF MALFUNCTION CAUSE IS HEADLIGHT HI/LO BULB OR DISCHARGE HEADLIGHT CONTROL MODULE 
 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 .)
About FixVault