Toyota Camry Manual page 1363

DI–336
DTC P0505
CIRCUIT DESCRIPTION
Intake Air Chamber
Throttle Valve
From
Air
Cleaner
Signal
ECM
Valve
DTC No.
Idle speed continues to vary greatly from target speed
P0505
(2 trip detection logic)
WIRING DIAGRAM
Fusible
Link
FL
Block
1
MAIN
From
F4
Battery
B–G
DIAGNOSTICS
Idle Control System Malfunction
IAC Valve
To Cylinders
P01559
DTC Detecting Condition
Engine Room J/B
1
1
EFI
B
F6 2A
5
5
W–B
2C
2
EFI Relay
EC
– ENGINE (1MZ–FE)
The rotary solenoid type IAC valve is located in front of the in-
take air chamber and intake air bypassing the throttle valve is
directed to the IAC valve through a passage.
In this way the intake air volume bypassing the throttle valve is
regulated, controlling the engine speed.
The ECM operates only the IAC valve to perform idle–up and
provide feedback for the target idling speed.
D IAC valve is stuck or closed
D Open or short in IAC valve circuit
D Open or short in A/C signal circuit
D Air intake (hose loose)
D ECM
J16
Junction
Connector
9
2 B
B–Y
2J J27
3
7
B–W
2K
1
Author :
Trouble Area
IAC Valve
16
R–W
E11
1
B–Y
A
15
2
A
Y–B
E11
3
II3
B–Y
B
B
J28
Junction
Connector
A C
8
B–W
J36
J35
E7
Junction
Connector
Date :
DI083–06
ECM
RSO
E01
RSC
E01
B+
MREL
A07448
571