Charging System - Mitsubishi MOTORS CARISMA 1996 Service Bulletin

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LOW ALTERNATOR OUTPUT VOLTAGE (APPROX. 12.3 V)
The cause is probably a malfunction of the alternator or one of the problems listed
at right.
Measure at the alternator connector
A-86.
•
Connect the connector. (Use test
harness M991519)
•
Voltage between 1 (black clip)
and earth
(Engine: Idling, Radiator fan: Not )
operating, Headlamps.: OFF → ON)
OK: 4.5 - 5.5 → 6.5 - 7.5 V
OK
<Incorrect>
Check the alternator. (Refer to GROUP

16 - Charging System.)

<Correct>
(Engine: Idling)
(Radiator fan: Not operating)
(Head lamp: OFF → ON)
(Stop lamp: OFF → ON)
Rear defogger switch: OFF → ON)
OK: Voltage increases by 0.2 - 3.5 V.
GDI -Troubleshooting
NG
Measure at the alternator connector
A-86.
•
Disconnect the connector, and
measure at the harness side
•
Disconnect the engine-ECU
connector
•
Continuity between 1 and earth
•
OK: No continuity
OK
Check the following connectors:
A-23, A-86, B-20
OK
Replace the engine-ECU.
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PROBABLE CAUSE
•
Malfunction of the charging system
•
Open circuit between the alternator G
terminal and he engine-ECU
•
Malfunction of the engine-ECU
NG
Check the harness wire between the
alternator and the engine-ECU, and
repair if necessary
NG
Repair
13J-47
5