Download DTC P0443 EVAPORATIVE EMISSION CONTROL SYSTEM

05–119
DIAGNOSTICS
DTC
P0443
–
EFI SYSTEM (2TR–FE)
05KO8–05
EVAPORATIVE EMISSION CONTROL
SYSTEM PURGE CONTROL VALVE CIRCUIT
CIRCUIT DESCRIPTION
In order to reduce hydrocarbon (HC) emissions, evaporated fuel from the fuel tank is routed through the charcoal canister to the intake manifold for combustion in the cylinders.
The ECM changes the duty signal to the EVAP VSV so that the intake of HC emissions is appropriate for
the driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is warmed up.
DTC No.
DTC Detection Condition
Trouble Area
S Open or short in EVAP VSV circuit
S EVAP VSV
S ECM
Proper response to ECM command does not occur (1 trip
detection logic)
P0443
WIRING DIAGRAM
W–G
L
2
2
2
2
ECM
8
E10 MREL
W–G
2
5
1
3
2
Engine
Room
EFI
Relay R/B
EFI
1
C17
IC4
2
2
B
B
J22
10 IM4 (LHD) W–B
J/C
C4 IC4 (RHD)
B
B
FL MAIN
C
C
12
IL3
J10
J/C
B
V10
VSV
B
A
A
1
P
2
23
E12 PRG
B
J2
J/C
B W–B
Battery
EB
A86056
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester II. Freeze frame data record the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air–fuel ratio was lean or rich, and other data
from the time the malfunction occurred.
05–120
DIAGNOSTICS
1
–
EFI SYSTEM (2TR–FE)
PERFORM ACTIVE TEST USING INTELLIGENT TESTER II(EVAP VSV)
(a)
(b)
(c)
(d)
F
F
E
Disconnect the vacuum hose of the EVAP VSV.
Connect the intelligent tester II to the DLC3.
Start the engine and turn the intelligent tester II ON.
Select the following menu items: Powertrain / Engine and
ECT / Active Test / Activate the VSV for EVAP Control.
Check if the disconnected port applies suction to your finger when operating the EVAP VSV using the intelligent
tester II.
Standard:
(e)
E
Air
VSV is ON
VSV is OFF
A80362
Tester Operation
Specified Condition
VSV is ON
Applies suction to your finger
VSV is OFF
Applies no suction to your finger
(f)
Reconnect the vacuum hose.
OK
CHECK FOR INTERMITTENT PROBLEMS
(See page 05–8)
NG
2
INSPECT ECM(CHECK VOLTAGE)
E11
E12
(a)
(b)
PRG
E01
ECM Connector
A18294
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table
below.
Standard:
Tester Connection
Specified Condition
PRG (E12–23) – E01 (E11–7)
9 to 14 V
OK
REPLACE ECM (See page 10–12)
NG
3
INSPECT VACUUM SWITCHING VALVE(OPERATION OF EVAP VSV)
(See page 12–5)
OK: Air flows when the battery voltage is applied to the EVAP VSV.
NG
OK
REPLACE VACUUM SWITCHING VALVE
05–121
DIAGNOSTICS
4
–
EFI SYSTEM (2TR–FE)
CHECK HARNESS AND CONNECTOR(ECM – EVAP VSV)
(a)
(b)
(c)
E12
Disconnect the E12 ECM connector.
Disconnect the V10 EVAP VSV connector.
Measure the resistance according to the value(s) in the
table below.
Standard (Check for open):
PRG
ECM Connector
Specified Condition
EVAP VSV (V10–2) – PRG (E12–23)
Below 1 Ω
Standard (Check for short):
A65745
(d)
(e)
Wire Harness Side:
V10
EVAP VSV Connector
Tester Connection
Specified Condition
EVAP VSV (V10–2) or PRG (E12–23) – Body ground
10 kΩ or higher
Reconnect the ECM connector.
Reconnect the EVAP VSV connector.
NG
A52933
A51984
Tester Connection
REPAIR OR
CONNECTOR
REPLACE
HARNESS
OR
OK
5
CHECK HARNESS AND CONNECTOR(EFI RELAY – EVAP VSV)
(a)
(b)
(c)
Engine Room R/B:
EFI Relay
Tester Connection
Specified Condition
EVAP VSV (V10–1) – EFI relay (3)
Below 1 Ω
Standard (Check for short):
A66291
(d)
(e)
Wire Harness Side:
V10
EVAP VSV Connector
A51984
Remove the EFI relay from the engine room R/B.
Disconnect the V10 EVAP VSV connector.
Measure the resistance according to the value(s) in the
table below.
Standard (Check for open):
Tester Connection
Specified Condition
EVAP VSV (V10–1) or EFI relay (3) – Body ground
10 kΩ or higher
Reinstall the EFI relay.
Reconnect the EVAP VSV connector.
NG
A52933
REPAIR OR
CONNECTOR
OK
INSPECT ECM POWER SOURCE CIRCUIT (See page 05–168)
REPLACE
HARNESS
OR