Mitsubishi MOTORS CARISMA 1996, Service Bulletin

Page: 135 / 232

5
LOW ALTERNATOR OUTPUT VOLTAGE (APPROX. 12.3 V) PROBABLE CAUSE
The cause is probably a malfunction of the alternator or one of the problems listed
at right.
•
Malfunction of the charging system
•
Open circuit between the alternator G
terminal and he engine-ECU
•
Malfunction of the engine-ECU
NG NG
Check the harness wire between the
alternator and the engine-ECU, and
repair if necessary
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
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
OK
Check the following connectors:
A-23, A-86, B-20
Check the alternator. (Refer to GROUP
16 - Charging System.)
OK NG
Repair
Replace the engine-ECU.
GDI -Troubleshooting
13J-47
<Incorrect>
<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.
www.WorkshopManuals.co.uk
Purchased from www.WorkshopManuals.co.uk