Honda Civic Service Manual page 331

VTEC/VTC
DTC Troubleshooting (cont'd)
10. Measure voltage between ECM connectorterminal
89 and body ground.
ECM CONNECTOR B (24P)
2 1 3 4 1 5
o 1
8 I
a t / t / n 3
15
WPSW {BLU/BLK}
Wire side of Iemale terminals
ls there battery voltage?
YES Repair open in the wire between the VTEC oil
pressure switch and the ECM (89).t
N O - G o t o s t e p 1 1 .
Turn the ignition switch OFF.
Disconnect ECM connector B {24P).
Check for continuity between ECM connector
t e r m i n a l B g a n d b o d y g r o u n d .
ECM CONNECTOR B {24P)
2 3 4 1 5 6
7
I 9
ol./ ./ 13
15
VTPSW {BLU/BLK}
W r r e s i d e o f f e m a l e t e r m i n a l s
ls there continuity?
YES Repair short in the wire between the VTEC oil
pressure switch and the ECM (89).I
NO Update the ECM if it does not have the latest
software. or substitute a known-good ECM, then
recheck (see page 1 1-6). lf the symptom/indication
goes away with a known-good ECM, replace the
o r i g i n a l E C N 4 . !
1 1 .
11-124
2P CONNECTOR
VTPSW
(BLU/BLK)
14. fMeasure voltage between VTEC oil pressure switch
2 P c o n n e c t o r t e r m i n a l s N o . 1 a n d N o . 2 ,
VTEC OIL PRESSURE SWITCH
(BRN/YELI
Wire side of Iemale terminals
ls there battery voltage?
Y E S - G o t o s t e p 1 5 .
NO Repair open in the wire between the VTEC oil
p r e s s u r e s w i t c h a n d G 1 0 1 . 1
Turn the ignition switch OFF.
Disconnect the VTEC solenoid valve 2P connector.
Check for resistance between VTEC solenoid valve
2 P c o n n e c t o r t e r m i n a l s N o , 1 a n d N o . 2 .
VTEC SOLENOID VALVE
2P CONNECTOR
T e r m i n a l s i d e o f m a l e t e r m i n a l s
ls there 14- 30 Sl ?
YES Go to step 18.
NO Replace the VTEC solenoid valve (see page
1 1 - 1 2 8 ) . t
t o .
1 7 .