Honda S2000 Service Manual page 296

PGM-FI System
DTC Troubleshooting (cont'd)
29. Check the engine compression (see page 6-32).
ls the engine compression OK?
YES Substitute a known-good ECM and recheck
(see page 11-5). lf the symptom/indication goes
away, replace the original ECM.I
N O R e p a i r t h e e n g i n e . l
30. Turn the ignition switch OFF.
31. Disconnect ECM connector B (25P).
3 2 . 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 )
33. Measure voltage between body ground and the
ECfvl connector terminal (see table).
ECM CONNECTOR B (25PI
INJ3 (BLU}
Wire side of female terminals
INJ4{YEL}
P R O B L E M
CYLINDER
DTC
EC t\4
TERMINAL
W I R E
COLOR
N o . 1
P0301
t t t l
B R N
N o . 2
P0302
8 3 R E D
N o . 3
P0303 B 4 BLU
N o . 4
P0304
E'5
YEL
34.
35.
ls therc battery voltage?
YES Go to step 34.
NO Go to step 42.
Turn the ignition switch OFF.
Disconnect the injector 2P connector from the
problem cylinder.
1 1 - 6 8
4 4 .
3 7 .
36. Measure resistance betvveen iniector 2P connector
t e r m i n a l s N o . 1 a n d N o . 2 .
INJECTOR 2P CONNECTOR
I s t h e r e 1 0 g
1 3 Q ?
YES Go to step 37.
N O R e p l a c e t h e i n j e c t o r ( s e e p a g e 1 1 - 8 7 ) . I
Exchange the injector from the problem cylinder
with one from another cylinder.
Let the engine idle for 2 minutes.
Test-drive the vehicle several times in the range of
the freeze data or under various conditions if there
was no freeze data.
Check for a DTC or Temporary DTC with the scan
t o o l .
ls DTC P0301, P0302, P0303 or P0304, or
Temporary DTC P1399 indicated?
YES Go to step 41.
NO Intermittent misfire due to injector
malfunction, etc.I
Determine which cylinder had the misfire.
Does the misf ire occur in the other cylinder where
the injectot was exchanged?
YES Replace the faulty injector.l
NO Substitute a known-good ECM and recheck
{see page 1 1-5). lf the symptom/indication goes
away, replace the original EClvl.l
Turn the ignition switch OFF.
Disconnect the injector 2P connector from the
p r o b l e m c y l i n d e r .
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 ) .
3 8 .
39.
42.
43.
4 1 .