2005 Honda Accord 2.4 Liter iVTEC DOHC ECU pinout diagram for the EVAP shut valve ground circuit

DTC P0449 Evaporative Emission (EVAP) Vent Solenoid Control Circuit.
Circuit Description
An ignition voltage is supplied to the evaporative emission (EVAP) canister vent solenoid valve. The control module grounds the EVAP canister vent solenoid valve control circuit to close the valve by means of an internal switch called a driver. The scan tool displays the commanded state of the EVAP canister vent solenoid valve as ON or OFF. The control module monitors the status of the driver. If the control module detects an incorrect voltage for the commanded state of the driver, this DTC sets.

Do you know how to test automotive electrical circuits using a volt meter ? How to test a transistor (driver) inside the PCM . Videos on youtube. Do you know what a wiring diagram is ?
Also search P0449 on youtube . Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click engine ,then under subsystem click fuel controls . Click search the blue link. Scroll down to #9 diagram . Circuit for vent solenoid . This video is a chevy truck ,doesn't matter .
GMC Chevy Truck DTC P0449 EVAP Vent Solenoid Control Circuit

www.bbbind.com/ free wiring diagrams . click on technical information .then five box will pop up ,click on tsb's an wiring diagrams .Next page go to the bottom of page a click I agree . On the next page click on wiring diagrams an enter your vehicle info . under system click engine , subsystem engine controls . Then click on the blue links an check out your diagrams .

from FSM. (takes a voltmeter and pressure test system, to fix EVAP)
takes tools. Read the FSM it covers this, and all other fails.
quote:
RIDGELINE - DTC Troubleshooting: P0498
DTC P0498: EVAP Canister Vent Shut
Valve Control Circuit Low Voltage
NOTE: Before you troubleshoot, record all freeze data and any
on-board snapshot, and review the general troubleshooting informa
tion.
1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS. (scan tool)
3. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0498 indicated?
YES
- Go to step 6.
NO
- Go to step 4.
4. Select EVAP CVS ON in the
INSPECTION MENU with the HDS.
5. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0498 indicated?
YES
-
Go to step 6.
NO
- Intermittent failure, the system is OK at
this time. Check for poor connections or loose
terminals at the EVAP canister vent shut valve and the PCM.
*
6. Turn the ignition switch OFF.
7. Disconnect the EVAP canister v
ent shut valve 2P connector.
8. Turn the ignition switch ON (II).
9. Measure voltage between EVAP canister vent shut
valve 2P connector terminal No. 2 and body ground.
Is there battery voltage?
YES
-
Go to step 10.
NO
- Repair open in the wire between t
he EVAP canister vent shut valve and the A/F
sensor relay (LAF), then go to step 18.

2000
why not post the DTC error for better answers/?
and country.?
now my answer from USA, cars.
1: in usa open hood, see vacuum sticker, its there.
2: in FSM there are 3, purge control and bypass VSV. and vent shut off VSV.
so which one. ill answer for all 3.
at the canister. (im looking ,in alldata.com so an you)
1: CAN , hose.
one goes to tank, directly not that hose.
2: hose 2. is vent shut valve top of CAN, and goes to Vent can filter.
3: hose 3: to purge joint then purge valve.
4: and last host to bypass valve. this valve has 3 hoses (unique)

alldata.com click evap emmissions tab.

• Evaporative Control Vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Batt. voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain
  

  vacuum during test.
  

  Possible causes
  

  • Faulty vent valve
  • Open, short or excessive resistance on Vent valve control circuit
  • Blockage of vent valve
  • Bad PCM
  Possible solutions:
  Replace Vent valve
• Repair open, short, or resistance problem in control circuit
• Repair open, or short, or resistance problem in power circuit
• Replace PCM I hope this atleast narrowed it for you.

service manual.
Code Description Possible Cause
0 ECU / ECU signal No signal to ECU
1 Oxygen sensor circuit Oxygen sensor or circuit, ECU
2 Oxygen sensor circuit Oxygen sensor or circuit, ECU
3 MAP sensor circuit Map sensor circuit
4 CKP sensor / engine speed (RPM) Crank angle sensor or circuit, ECU
sensor
5 MAP sensor circuit MAP sensor or circuit, mechanical
problem
6 ECT sensor circuit ECT sensor or circuit, automatic
transaxle control unit
7 TPS / Angle Sensor TPS sensor or circuit, automatic
transaxle control unit
8 CKP sensor / engine speed (RPM) Crank angle sensor or circuit, ECU
sensor
9 CMP sensor CMP sensor or circuit
10 IAT sensor IAT sensor or circuit
11 Idle Mixture Adjuster Sensor Idle mixture adjuster sensor or
circuit
12 EGR system fault No EGR action, faulty EGR valve
13 BARO sensor circuit BARO sensor or circuit
14 Idle Air Control valve circuit / ECU Open or shorted out ignition signal
circuit / No signal to ECU
15 Ignition Output signal Open or shorted ignition output
signal circuit
16 Fuel Injector Circuit Open or shorted fuel injector
circuit
17 VSS circuit VSS sensor or circuit
18 Ignition Timing Adjuster Open or shorted signal circuit
19 A/T Lock-up control solenoid Open or shorted signal circuit,
Lock-up control solenoid lock-up solenoid
20 Electrical Load Detector / Sensor Electrical load detector or circuit
Honda/Acura
Fault Code Definitions (21 - 59)
Chapter 3 22
Code Description Possible Cause
21 Spool Solenoid Valve Open or shorted signal circuit,
spool solenoid valve
22 Valve Timing Electronic Oil Open or shorted signal circuit,
pressure switch valve timing oil pressure switch
23 Knock sensor circuit Knock sensor or circuit
30 AT / ECU communication signal A AT control unit, ECU
31 AT / ECU communication signal B AT control unit, ECU
35 Traction control / ECU / signal Traction control module, ECU
36 Traction control / ECU / signal Traction control module, ECU
41 Oxygen sensor heater - left side Oxygen sensor / heater or circuit
42 Oxygen sensor heater - right side Oxygen sensor / heater or circuit
43 Fuel Supply system - left side Oxygen sensor or circuit, fuel
system
44 Fuel Supply system - right side Oxygen sensor or circuit, fuel
system
45 Fuel metering - left side Injector control circuit, incorrect
fuel metering
46 Fuel metering - right side Injector control circuit, incorrect
fuel metering
48 Heated oxygen sensor Oxygen sensor or circuit
53 Right Knock Sensor Right knock sensor or circuit
54 CKP sensor 2 CKP sensor 2 or circuit
59 CMP sensor 2 CMP sensor 2 or circuit

P1607 Engine Control Module (ECM)/Powertrain Control Module (PCM) Internal Circuit Malfunction.

aquire the appropriate pinout diagram for your ecu's plugs. then proceed to verify each of the ecu's power wires have the correct voltage. then proceed to perform a continuity test on all ecu grounds. this means checking voltage from the ecu plug to the ground location that the wire goes to. you should find your problem somewhere within there if you have already swapped out with a KNOWN GOOD ecu.

code p1457 is an evap leak code. a honda dealer can run a functions test on the system with the honda daig scan tool. but 90% of the time the probelm is the CVS valve. also known as canister vent shut valve. i've seen this a hundred times. its located under the rear of the car on the drivers side. its bolted to the evap canister with 2 (most likely rusted out) bolts.- hope this helps

there is no manual adjustment all handle by ecu it should be near throttle

it could be many things my suggestion is if check engine light comes on retrieve the code from ecu either buy following instructions in troubleshooting section of repair manual ex:haynes or chiltons or purchasing OBDI scanner from local parts store then moving on from there
first your mechanical timing is it on the money? using timing light and repair manual to check
second faulty crankcase or cam shaft positioning sensor
timing belt needs replacement
bad grounding system
weak voltage system ex:battery
faulty ecu ignition circuit or ecu malfunction
faulty map sensor
faulty ignition spark are you getting it correctly? or enough of it ether is lighter and far more volatile then fuel
faulty evap system ex: purge valve or charcoal cannister, EGR system