Honda S2000 Service Manual page 122

Gylinder Head
I
I
DTC Troubleshooting (cont'd)
With the battery positive terminal still connected to
the VTEC solenoid valve, measure voltage between
C 1 0 a n d b o d y g r o u n d .
ECM CONNECTOR C {13P)
VTM {BLU/BLKI
W l r e s i d e o f f e m a l e t e r m i n a l s
Isthere battety voltage above 5,000 rpm?
YES Go to step 24.
NO Replace the VTEC pressure switch.l
Turn the ignition switch OFF.
Disconnect the battery positive cable from the
VTEC solenoid valve terminal.
Check for continuity between the VTEC solenoid
valve harness 1P connector terminal and the ECM
c o n n e c t o r t e r m i n a l 8 1 2 .
VTEC SOLENOID VALVE HARNESS
1P CONNECTOR
ECM CONNECTOR B (25 PJ
W i r e s i d e o f f e m a l e t e r m i n a l s
Is there continuity?
YES Go to step 27.
NO Repair an open in the wire between the ECM
(B 12) and VTEC solenoid valve connector.l
24.
25.
26.
6-8
27. Check for continuity between the VTEC solenoid
valve 1P connector terminal and body ground.
VTEC SOLENOID VALVE HARNESS
1P CONNECTOR
Wire side of female
Iermrnal
ls thete continuity?
YES Repair a short in the wire between the ECM
(B 12) and VTEC solenoid valve connector.t
NO Substitute a known-good ECM and recheck
(see page 11-5). lf symptom/indication goes away,
r e p l a c e t h e o r i g i n a l E C M ( s e e p a g e 1 1 - 4 ) . 1