2002 HONDA CIVIC dtc

DTC P0340: CMP Sensor A No Signal
DTG P0344: CMP Sensor A Intermittent
Interruption
1. Reset the ECM (see page '11-4).
2. Start the engine.
ls DTC P0340 and/or P0344 indicated?
YES-Go to step 3.
NO Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the CMP sensor A and at the ECM.I
3. Turn the ignition switch OFF.
4. Disconnect the CMP sensor A 3P connector.
5. Turn the ignition switch ON (ll).
6. Measure voltage between CMP sensor A 3P
connector terminal No. 3 and body ground.
CMP SENSOR A 3P CONNECTOR
(BLK/YEL}
Wire side of female terminals
ls there battety voltage?
YES Go to step 7.
NO Check the No. 4 ACG {10A) fuse in the under-
dash fuse/relay box. lf the fuse is OK, repair open in
the wire between the CN4P sensor A and No. 4 ACG
(10A) fuse.I
tG1
123
7. Measure voltage between CMP sensor A 3P
connector terminal No. 1 and body ground.
CMP SENSORA 3P CONNECTOR
Wire side olfemale termina s
ls therc about 5 V?
YES-Go to step 8.
NO-Go to step 10.
8. Measure voltage between CMP sensor A 3P
connector terminals No. 2 and No. 3.
CMP SENSOR A 3P CONNECTOF
;f-;-1 ,o, ,r.*,"r.,
I l1 J l-t
,-or---T--I{8RN/YEL) ni-
ls there battety voltage?
YES Go to step 9.
NO-Repair open in the wire between the Cl\4P
sensor A and G101.1
9. Substitute a known-good CMP sensor A and
recheck.
ls DTC P0340 and/ot P0344 indicated?
YES Update the ECM if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 11-6). lf the symptom/indication
goes away with a known-good ECM, replace the
original ECM.I
NO Replace the original CMP sensor A {see page
11-128).t
(cont'd)
11-121

VTEC/VTC
10.
DTC Troubleshooting (cont'd)
Measure voltage between ECM connector terminal
A25 and body ground.
ECM CONNECTOR A 131P)
Wire side of female te.minals
ls there about 5 V?
YES-Repair open in the wire between the ECM(A25) and CMP sensor A.I
NO-Go to step 11.
Turn the ignition switch OFF.
Disconnect ECM connector A (31P)
Check for continuity between ECM connecror
terminal A25 and body ground.
ECM CONNECTON A 131P}
Wire side of femaleterminals
ls tnere continuity?
YES-Repair short in the wire between the ECM(A25) and the CMP sensor A. t
NO Update the ECt\4 if it does not have the latest
software, or substitute a known-good ECM, thenrecheck (see page 1 1-6). lf the symptom/indicationgoes away with a known-good ECM, replace the
original ECM.I
11.
't2.
11-122
DTC P0341: WC Phase Gap
1. Resetthe ECM {see page 11-4).
2. Start the engine.
ls DTC P0341 indicated?
YES Go to step 3.
NO Intermittent failure, system is OK at this time.Check for poor connections or loose terminals atthe CMP sensor A and at the ECM.I
3. Check the VTC oil control solenoid valve (see page
11_127]-.
Isthe VTC oil control solenoid valve OK?
YES-Go to step 4.
NO-CIean the VTC oil control solenoid valve, orreplace it (see page 11-'l27l.a
4. Remove the head cover, and check the cam chain
{see page 6-12).
ls the cam chain OK?
YES Go to slep 5.
NO Replace the cam chain (see page 6-12).1
5. Check the VTC actuator (see page 6-8).
ls the VTC actuator OK?
YES- U pdate the ECM if it does not have the tatest
soflware, or substitute a known-good ECI\4, thenrecheck (see page 11-6). lf the symptom/indicationgoes away with a known-good ECM, replace the
original ECM.I
NO- Replace the VTC actuator.l

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. Reset the ECM (see page 11-4).
2. Check the engine oil level, and refill ifnecessary.
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 SWITCH2P CONNECTOR
Terminal side of male terminals
Is there continuity?
YES-Go to step 8.
NO Replace the VTEC oil pressure switch.l
8. Turn the ignition switch ON (ll).
9. Measure voltage between VTEC oil pressure switch
2P connector terminal No. 1 and body ground
ls there battety voltage?
YES Go to steP 14.
NO-Go to step 10.
(cont'd)
VTEC OIL PRESSURE SWITCH2P CONNECTOR
VTPSW
/T {BLU/BLK}
{.--r r-l'--.l
J II
oI
Wire side of female terminals
11-123

VTEC/VTC
DTC Troubleshooting (cont'd)
10. Measure voltage between ECM connectorterminal
89 and body ground.
ECM CONNECTOR B (24P)
213 415o1
8Iat/t/n315
WPSW {BLU/BLK}
Wire side of Iemale terminals
ls there battery voltage?
YES Repair open in the wire between the VTEC oilpressure switch and the ECM (89).t
NO-Go to step 11.
Turn the ignition switch OFF.
Disconnect ECM connector B {24P).
Check for continuity between ECM connector
terminal Bg and body ground.
ECM CONNECTOR B {24P)
2 3 41567
I9ol./ ./ 1315
VTPSW {BLU/BLK}
Wrre side of female terminals
ls there continuity?
YES Repair short in the wire between the VTEC oilpressure 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
original ECN4. !
11.
11-124
2P CONNECTOR
VTPSW(BLU/BLK)
14. fMeasure voltage between VTEC oil pressure switch
2P connector terminals No. 1 and No. 2,
VTEC OIL PRESSURE SWITCH
(BRN/YELI
Wire side of Iemale terminals
ls there battery voltage?
YES-Go to step 15.
NO Repair open in the wire between the VTEC oil
pressure switch and G 101.1
Turn the ignition switch OFF.
Disconnect the VTEC solenoid valve 2P connector.
Check for resistance between VTEC solenoid valve
2P connector terminals No, 1 and No. 2.
VTEC SOLENOID VALVE2P CONNECTOR
Terminal side of male terminals
ls there 14- 30 Sl ?
YES Go to step 18.
NO Replace the VTEC solenoid valve (see page
11-128).t
to.
17.

WEC/VTC
30.
DTC Troubleshooting (cont'd)
Disconnect ECM connector B (24P)
Check for continuity between ECM connector
terminal 815 and body ground.
ECM CONNECTOR B {24P)
Wire side of female terminals
ls there continuity?
YES-Repair short in the wire between the VTEC
solenoid valve and the ECM (815).1
NO Go to step 32.
11-126
32. Connect VTEC solenoid valve 2P connector
terminal No. 2 to body ground with a jumper wire.
VTEC SOLENOID VALVL2P CONNECTOR
r-.'-r.---.1
t1t2l
+JUMPER I VtSWIRE I IGRN/YEL)
I
Wire side of female terminals
Check for continuity between ECM connector
terminal 815 and body ground.
ECM CONNECTOR B {24PI
Wire side of female terminals
ls thete continuity?
YES Update the ECM if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 11-6). lf the symptom/indication
goes away with a known-good ECM, replace the
original ECM.I
NO Repair open in the wire between the VTEC
solenoid valve and the ECM (815).I

ldle Control System
DTC Troubleshooting
DTC P0505: ldle Control System Malfunction
NOTE: lf DTC P1519 is stored atthe same time as DTC
P0505, troubleshoot DTC P1519 first, then recheck for
DTC P0505.
1. Start the engine. Hold the engine at 3,000 rpm with
no load (in neutral) until the radiator fan comes on,
then let it idle,
2. Checkthe engine speed at idle with no,load
conditions: headlights, blower fan, rear defogger,
radiator fan, and air conditioner off.
Is the engine running at 750t50 rpm?
YES - Intermittent failure, system is OK at this
trme.I
NO lf the idle speed is less than 700 rpm, go to
step 3; if it's 800 rpm or higher, go to step 4.
3. Disconnect the idle air control {lAC) valve3P
connector.
Does the engine speed increase or fluctuate?
YES- Check the idle speed {see page 1 1-138). lf the
idle will not adjust properly, clean the passage in
the throttle body, and then adjust the idle. I
NO- Replace the IAC valve.I
4. Turn the ignition switch OFF.
5. Remove the intake air duct from the throttle body.
6. Start the engine, and let it idle.
11-130
(
7. Put your fingers on the lower pon (A) inthethrottle
oooy.
Does the engine stall?
YES Checkthe idle speed (see page 11-138). lfit's
out of specification, replace the IAC valve.l
NO With the throttle valve completely closed,
check for vacuum leaks, and repair as necessary.l

DTC Pl519: IAC Valve Circuit Malf unction
1. Resetthe ECM (see page 11-4).
2. Turn the ignition switch ON (ll)
ls DTC P 1519 indicated?
YES Go to step 3.
NO-lntermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the IAC valve and at the ECM.I
3. Turn the ignition switch OFF.
4. Disconnect the IAC valve 3P connector.
5. Turn the ignition switch ON (ll).
6. Measure voltage betlveen IAC valve 3P connector
terminal No. 2 and body ground.
IAC VALVE 3P CONNECTOR
IGP {YEL/BLK)
Wire side of female terminals
ls there battery voltage?
YES Go to step 7.
NO-Repair open in the wire between the IAC valve
and the PGM-Fl main relay 1.1
Turn the ignition switch OFF.
123
7.
8, Check for continuity between body ground and IAC
valve 3P connector terminal No. 1.
IAC VALVE 3P CONNECTOR
123
PG1 {BLK}
a.
Wire side of lemale terminals
Is there continuity?
YES-Go to step 9.
NO Repair open in the wire between the IAC valve
and G'101.1
Disconnect ECM connector A (31P)
Check for continuity between body ground and
ECM connector terminal A12.
ECM CONNECTOR A 131P)
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IACV {BLK/RED}
1,)
Wire side oJ Jemale terminals
ls there continuity?
YES-Repair short in the wire between the IAC
valve and the ECM (A12).1
NO Go to step 1 1.
9.
10.
LCOnI Ol
11-131

ldle Control System
(DTC Troubleshooting (cont'd)
11. Connect IAC valve 3P connector terminal No.3 to
body ground with a jumper wire.
IAC VALVE 3P CONN€CTOR
IACV IBLK/REO}
JUMPER WIRE
Wire side of female terminals
Check for continuity between ECM connector
terminalAl2 and body ground.
ECM CONNECTOR A 131P)
Wire side of female terminals
ls there continuity?
YES Go to step 13.
NO-Repair open in the wire between the IAC valve
and rhe EcM (A12).r
Reconnect the IAC valve 3P connector.
Turn the ignition switch ON (ll).
13.
14.
11-132
15. Measure voltage between body ground and ECM
connector terminal A12.
ECM CONNECTOR A 131P}
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IACV IBLK/RED)
Wire side ol female terminals
I s there battery voltage?
YES-Update the ECI\4 if it does not have the latest
software, or substitute a known-good ECM, then
recheck (see page 11-6). lf the symptom/indication
goes away with a known-good ECM, replace the
original ECI\4.1
NO-Replace the IAC valve.I!