Mazda MX-6 1998, Workshop Manual

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TROUBLESHOOTING [EXTERIOR LIGHTING SYSTEM]
3 Low beam headlights do not illuminate
TROUBLESHOOTING HINTS
Malfunction in headlight ground circuit
© Low beam headlights do not illuminate
• Malfunction in wiring harness between light switch (headlight switch) and ground
Malfunction in headlight operation circuit
© Low beam headlights do not illuminate
• CPU malfunction
• Light switch (headlight switch) malfunction
• Headlight bulb malfunction
• Malfunction in wiring harness between headlight and CPU
• Malfunction in wiring harness between headlight and light switch (headlight switch)
STEP INSPECTION ACTION
Inspect headlight (low beam) bulb.
Is headlight (low beam) bulb okay? Yes Go to next step.
No Replace headlight bulb.
c r 09-18 HEADLIGHT BULB
REMOVALVINSTALLATION
Is it equipped with DRL? Yes Go to next step.
No Go to step 5.
Remove column cover.
Inspect light switch (headlight switch).
j t
0 9 -1 8 LIGHT SWITCH INSPECTION
Is light switch (headlight switch) okay?
Yes Go to next step.
No Replace light switch (headlight switch).
tr 09-18 LIGHT SWITCH REMOVAL/INSTALLATION
Remove driver’s side front scuff plate.
Remove driver's side front side trim.
Disconnect CPU connectors.
Turn headlight switch to second position.
Measure voltage at terminals 4A and 4C at
CPU connector D of wiring harness.
Is voltage
B+?
Yes Replace CPU.
t y 0 9-40 CPU REMOVAL/INSTALLATION
No
Repair wiring harness between headlights (low beam) and
CPU.
u x i r a
4
C
4
A
iBIESiEB
4
D
4
B
W 6 U 9 0 1 W M M
Remove column cover.
Set dimmer switch to HI.
Measure voltage at terminals 1B and 1F at
light switch (headlight switch) connector of
wiring harness.
Is voltage B+?
Yes Go to next step.
No
Repair wiring harness between headlights (low beam) and
light switch (headlight switch).
*
1
G [XI
1
A
*
1
H
1
F
|1
D
1
B
W 6 U 9 0 1W M N
0 9 -0 1 J -9