Honda Civic Service Manual page 330

DTC Pl259: WEC System Malf unction
SpecialTools Required
. Pressure gauge adapter 07NAJ P07010A
. A/T low pressure gauge w/panel 07406-0070300
. A/T pressure hose 07406-0020201
. Av/T pressure hose,2,210 mm 07IMAJ-PY4o11A
. l"/T pressure adapter 07MAJ-PY40120
. Oil pressure hose 07ZAJ-S54,4200
1 . R e s e t t h e E C M ( s e e p a g e 1 1 - 4 ) .
2 . C h e c k t h e e n g i n e o i l l e v e l , a n d r e f i l l i f n e c e s s a r y .
3. Start the engine. Hold the engine at 3,000 rpm with
no load {in neutral) until the radiator fan comes on.
4. Road testthe vehicle:
Accelerate in the 1st gear to an engine speed over
4.000 rpm. Hold the speed for at least 2 seconds. lf
DTC P1259 is not repeated during the first road test,
repeat the test two more times.
ls DTC P1259 indicated?
YES Go to step 5.
NO-lntermittent failure, system is OK at this time
Check the oil consumption if oil was added in step
2. Check for poor connections or loose terminals at
the VTEC solenoid valve, the VTEC oil pressure
switch, and at the ECI\4. I
5, Turn the ignitjon switch OFF.
6. Disconnect the VTEC oil pressureswitch 2P
connector.
7. Check for continuity between VTEC oil pressure
switch 2P connector terminals No. 1 and No. 2
VTEC OIL PRESSURE SWITCH
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
Is there continuity?
YES-Go to step 8.
NO Replace the VTEC oil pressure switch.l
8 . 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 ) .
9. Measure voltage between VTEC oil pressure switch
2P connector terminal No. 1 and body ground
ls there battety voltage?
Y E S G o t o s t e P 1 4 .
NO-Go to step 10.
( c o n t ' d )
VTEC OIL PRESSURE SWITCH
2P CONNECTOR
VTPSW
/T\
{BLU/BLK}
{.--r r-l'--.l
\rJ
I
I
o
I
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
11-123