CHARGING SYSTEM — Trouble-shooting — With IC Regulator (Base K11)
EL-34flowchartBase K11 CHARGING SYSTEM trouble-shooting (IC regulator type). Decision-tree inspection table: ignition-ON charge-lamp behaviour → disconnect/ground test (bulb vs IC-RG/ACG) → idling lamp behaviour (drive belt) → 1500rpm + lighting ON → B-terminal voltage (>15.5V=damaged IC-RG; 13-15V=OK). Need 30V voltmeter + full battery. Inspect fusible link first.
Trouble-shooting
Before conducting an alternator test, make sure that the battery is fully charged. A 30-volt voltmeter and suitable test probes are necessary for the test. The alternator can be checked easily by referring to the Inspection Table.
CAUTION
Before starting trouble-shooting, inspect the fusible link.
WITH IC REGULATOR
Charging system inspection table (IC regulator)
1
[A] Ignition switch 'ON'.
2
Charge warning light OFF or ON?
Light ON
(If light ON) Disconnect connector and ground lead wire.
(If light ON) Disconnect connector and ground lead wire.
Light OFF or ON?
Light OFF
3
(Light OFF at ignition ON) Engine idling.
4
Dim light / Light flickers / Bright light → Light 'ON' or 'OFF'?
Light OFF
(Light OFF) Engine speed 1,500 rpm, Lighting switch 'ON'.
(Light OFF) Engine speed 1,500 rpm, Lighting switch 'ON'.
Light 'ON' or 'OFF'?
Light ON
5
(Light ON) Check or replace drive belt.
6
Engine idling.
7
Light 'ON' or 'OFF'?
Light OFF
(Light OFF) O.K.
Light ON
8
(Light ON) Damaged A.C.G.
NOTE
s:
1) Use fully charged battery.
2) Light = Charge warning light. A.C.G. = Alternator parts except IC regulator. IC-RG = IC regulator. O.K. = IC-alternator is in good condition.
3) When reaching 'Damaged A.C.G.', remove alternator from vehicle and disassemble, inspect and correct or replace faulty parts.
4) Terminal 'B' is marked on rear cover of alternator.