Honda Civic Service Manual page 531

\
J
Exhaust Gas Recirculation System (D16Y5 engine with M/T)
M/T:
EGR VALVE 6P CONNECTOB (C14'rl
G 1 0 l
IBLK}
1
a
PNK
IE.EGRI
Wi16 side of male terminals
I
sG2
{GRN/
BLK}
vcc2
{YEL/
BLU)
-
Th6 MIL ha3 b€on reponed on.
-
DTC Pl,{tl is 3tored.
Prcblem verification:
1. Do the ECM Reset Procedure.
2. Connect the SCS service con_
nector.
3 . S t a r t t h e e n g i n e . H o l d t h e
engine at 3,000 rpm with no
load (transmission in neutral)
untilthe radiator fan comes on.
4. Drive the vehicle on the road
for approx. 10 minutes. Try to
keep the engine speed in the
1,700 - 2,500 rpm range.
lnlermittont tailure, svalem is OK
at thi3 tim6. Check foi Poor con'
nections or looso wiro3 at Cl/K
IEGR valvsl and ECM.
ls DTC P1491 indicated?
Check tor a malfunction in the
EGR valv6:
1. Turn the ignition switch OFF.
2. Disconnect the EGR valve 6P
connector.
3. Stanthe engine and let it idle
4. Measure voltage between the
EGR valve 6P connector termi'
n a l s N o . 4 a n d N o . 6 .
Check the EGR valve:
1. Turn the ignition switch OFF
2. Turn the ignition switch ON lll).
3. Measure voltage between the
EGR valve 6P connector termi
n a l s N o . 2 a n d N o . 3 .
ls there battery voltage?
Substitute a known-good ECM
and recheck. It symptom/indica_
tion goes away, replace th€ origi-
nal ECM.
ls there approx.5V?
(To page 11-262)