Acura 2002 RSX Service Manual page 68

Charging Circuit Troubleshooting
lf the charging system indicator does not come on or
does not go off, or the battery is dead or low. test the
following items in the order listed below:
Battery (see page 22-54)
Charging system indicator
Alternator and regulator circuit
Alternator control system
Gharging System Indicator Test (K20A3
engine)
1 . T u r n t h e i g n i t i o n s w i t c h O N ( l l )
Does the charging system indicator come on?
YES Go to step 2.
NO Go to step 3.
2. Start the engine.
Does the charging system indicator go olt?
YES Charging system indicator circuit is OK.Go to
the Alternator and Regulator Circuit Test,I
N O - G o t o s t e p 3 .
3. Turn the ignition switch OFF.
4. Troubleshootthe multiplex control system (see
page 22-1751.
ls the multiplex contrcl system OK?
YES Go to step 5.
NO Check the multiplex control system as
indicated by the DTC (see step 8 on page 22-1751.a
Disconnect the starter subharness 8P connector.
Measure the voltage at the No. 1 terminal of the
starter subharness 8P connector with the ignition
switch ON ( ll).
STARTER SUB.HARNESS 8P CONNECTOR
IG {BLK/YEL)
ls there battery voltage?
YES Go to step 7.
NO Check for a blown No.4 (10A) fuse in the
under-dash fuse/relay box. lf the fuse is OK, repair
an open in the wire between the alternator and the
under-dash fuse/relay box. !
7. Turn the ignition switch OFF.
8. Disconnect engine control module (ECM)/
pow€nrain control module (PCM)/ connector B
\24P1.
9. Check continuity between the ECM/PCM connector
terminal 810 and starter subharness 8P connector
terminal No. 5.
ls there continuity?
YES - Go to step 10.
NO- Ropair an open in the wire between the
alternator and the ECM/PCl\il.f
(cont'd)
€CM/PCM CONNECTOS B (2aP)
4-27