Mazda MX-3 silhouetteMX-3

CHARGING SYSTEM

G-9flowchart

Generator terminal layout illustrated for both B6 DOHC and K8 DOHC.

SYSTEM INSPECTION

Charging System Inspection

1
STEP 1: Check battery positive voltage; is it correct? Specification: Above 12.4V
No
Check battery (page G-10)
Yes
2
STEP 2: Turn ignition switch on; does generator warning light illuminate?
No
Check generator warning light bulb and wiring harness between warning light and terminal L
Yes
3
STEP 3: Start engine; does generator warning light go out?
No
STEP 4: Is voltage at generator terminals correct? (see specification table)
Yes
4
STEP 5: Connect an ammeter (90A min.) between terminal B and harness. Start engine and turn all electrical loads OFF. Hold engine speed at 2,500-3,000 rpm. Does output current increase when electrical loads are applied?
Yes
Charging system normal
No
5
STEP 6: Is drive belt tension OK? (page G-18)
No
Adjust drive belt tension; Replace drive belt
Yes
6
Replace generator (page G-12)

Step 4 — Generator terminal voltage specification

B
Ign : ON (V)B+
Idle (V)14.1-14.7
L
Ign : ON (V)Approx. 1
Idle (V)14.1-14.7
S
Ign : ON (V)B+
Idle (V)14.1-14.7

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