A11666
ECM
Vapor Pressure Sensor
2B6
P-B
VSV for EVAP
B-R
2
15 V
VC
PTNK
E1
E2
EVP1
E01
E01
TBP
3
2
Engine Room J/B
B-W
W-B
P
1
WE5
E82
17
18
7
3
E7
EFI Relay
PL-R
ID1 II215 4
5
E5
ID1 9
6 2G
4 2
53
2
1 EFI
No.1
From
Battery
20
G
VSV for Pressure
Switching ValveCCV
2
110
318
1
VSV for CCV
14
E01 L-R L-R
W WID1
ID1 II2
E5
E8 B-W
2B
2B 2FEFI
No.2
4
EDID1II1 G
B-W B-W
2
P-B
L-OFrom
Terminal
MREL of
ECM
B
B-W
- DIAGNOSTICSENGINE
DI-75
231 Author: Date:
2001 AVALON (RM808U)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
If DTC P0441, P0446, P0450 or P0451 is output after DTC P0440 or P0442, first troubleshoot DTC
P0441, P0446, P0450 or P0451. If no malfunction is detected, troubleshoot DTC P0440 or P0442 next.
Ask the customer whether, after the MIL came on, the customer found the fuel tank cap loose and tight-
ened it. Also ask the customer whether the fuel tank cap was loose when refuelling. If the fuel tank cap
was loose, it was the cause of the DTC. If the fuel tank cap was not loose or if the customer was not
sure if it was loose, troubleshoot according to the following procedure.
Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame
records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for
determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel
ratio was lean or rich, etc. at the time of the malfunction.
When the ENGINE RUN TIME in the freeze frame data is less than 200 seconds, carefully check the
vapor pressure sensor.
