DTC Troubleshooting: P0443 - Honda FIT GK 2014-2020

1.

Problem verification:

Problem verification

?1.	Turn the vehicle to the ON mode.

?2.	Clear the DTC with the HDS.

?3.	Start the engine.

?4.	Hold the engine speed at 3,000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

?5.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC
P0443 EVAP Canister Purge Valve Circuit Malfunction

Is DTC P0443 indicated?


	YES

The failure is duplicated. Go to step 2.


	NO

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EVAP canister purge valve and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?

2.

Determine possible failure area (EVAP canister purge valve stuck open failure, EVAP canister purge valve stuck closed failure):

Determine possible failure area (EVAP canister purge valve stuck open failure, EVAP canister purge valve stuck closed failure)

?1.	Turn the vehicle to the OFF (LOCK) mode, and allow the engine to cool below 140 °F (60 °C).

?2.	Disconnect the vacuum hose (A) from the EVAP canister purge valve (B) in the engine compartment, then connect a vacuum pump/gauge, 0?30 inHg, to the EVAP canister purge valve as shown.

?3.	Start the engine, and let it idle.

Is there vacuum?


	YES

The EVAP canister purge valve is stuck open. Go to step 3.


	NO

The EVAP canister purge valve is stuck closed. Go to step 5.

3.

Determine possible failure area (PCS line, EVAP canister purge valve):

Determine possible failure area (PCS line, EVAP canister purge valve)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Disconnect the following connector.

EVAP canister purge valve 2P connector

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	EVAP canister purge valve 2P connector: disconnected
Test point 1	EVAP canister purge valve 2P connector No. 1 or No. 2 (YEL wire)*
Test point 2	Body ground

*: Terminal number may be substituted by the vehicle type. The test point can be identified by the wire color.

Is there continuity?


	YES

Go to step 4.


	NO

Replace the EVAP canister purge valve.?

4.

Shorted wire check (PCS line):

Shorted wire check (PCS line)

?1.	Jump the SCS line with the HDS, and wait more than 1 minute.

?2.

Disconnect the following connector.

PCM connector B (51P)

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	EVAP canister purge valve 2P connector: disconnected
	PCM connector B (51P): disconnected
Test point 1	EVAP canister purge valve 2P connector No. 1 or No. 2 (YEL wire) *
Test point 2	Body ground

*: Terminal number may be substituted by the vehicle type. The test point can be identified by the wire color.

Is there continuity?


	YES

Repair a short in the PCS wire between the PCM (B15) and the EVAP canister purge valve.?


	NO

The PCS wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0443 goes away and the PCM was substituted, replace the original PCM.?

5.

Open wire check (IG1 ACG/IG1(PCS) line):

Open wire check (IG1 ACG/IG1(PCS) line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Disconnect the following connector.

EVAP canister purge valve 2P connector

?3.	Turn the vehicle to the ON mode.

?4.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	EVAP canister purge valve 2P connector: disconnected
Test point 1	EVAP canister purge valve 2P connector No. 1 or No. 2 (WHT wire)*
Test point 2	Body ground

*: Terminal number may be substituted by the vehicle type. The test point can be identified by the wire color.

Is there battery voltage?


	YES

The IG1 ACG/IG1(PCS) wire is OK. Go to step 6.


	NO

Repair an open in the IG1 ACG/IG1(PCS) wire between the EVAP canister purge valve and the No. C30 (10 A) fuse in the under-dash fuse/relay box.?

6.

Open wire check (PCS line):

Open wire check (PCS line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Jump the SCS line with the HDS, and wait more than 1 minute.

?3.

Disconnect the following connector.

PCM connector B (51P)

?4.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	EVAP canister purge valve 2P connector: disconnected
	PCM connector B (51P): disconnected
Test point 1	EVAP canister purge valve 2P connector No. 1 or No. 2 (YEL wire)*
Test point 2	PCM connector B (51P) No. 15

*: Terminal number may be substituted by the vehicle type. The test point can be identified by the wire color.

Is there continuity?


	YES

The PCS wire is OK. Go to step 7.


	NO

Repair an open in the PCS wire between the PCM (B15) and the EVAP canister purge valve.?

7.

EVAP canister purge valve internal resistance check:

EVAP canister purge valve internal resistance check

?1.

At the purge valve side, measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	EVAP canister purge valve 2P connector: disconnected
	PCM connector B (51P): disconnected
Test point 1	EVAP canister purge valve 2P connector No. 1 (EVAP canister purge valve side)
Test point 2	EVAP canister purge valve 2P connector No. 2 (EVAP canister purge valve side)

Is there about 23?26 ? at room temperature?


	YES

The PCS wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0443 goes away and the PCM was substituted, replace the original PCM.?


	NO

Replace the EVAP canister purge valve.?