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G34818
MREL
B--W
42
3
EFI MAIN Relay
E24
E23
2
IE4
EB1
EFI
1
B
5
Battery
FL MAIN
V9
Pressure Control Valve
PRV
4
1
1
1
1
1
1
2
1
2
B--W
6
Engine Room R/B and J/B
ECM
1A
B--W
B
A
A
D
E
EB1
8
4
J48
J47
R--W
R--W
J/C
J49
J/C
GR
B--O
W
1
B--W
B--W
J47
J/C
C
C
R--W
05--52
--
DIAGNOSTICS
ECD SYSTEM (1ND--TV)
COROLLA Supplement (RM1129E)
DTC
P0089
FUEL PRESSURE REGURATOR 1
PERFORMANCE
DTC
P1271
FUEL REGULATOR CIRCUIT MALFUNCTION
(EDU DRIVE)
CIRCUIT DESCRIPTION
Based on signals from the ECM, the pressure control valve opens when sudden deceleration occurs, or
when the ignition switch is OFF, to prevent the fuel pressure from becoming too high.
DTC No.
DTC Detection Condition
Trouble Areas
P0089
S
Open or short in pressure control valve circuit (DTC P1271
set simultaneously)
(The MIL is illuminated as well as a DTC being set immediately
malfunction is detected)
S
ECM internal error (DTC P1271 not set)
(The MIL is illuminated as well as a DTC being set immediately
malfunction is detected)
S
Open or short in pressure control valve circuit
S
Open or short in pressure control valve
S
ECM
P1271
S
Open or short in pressure control valve circuit
(The MIL is illuminated as well as a DTC being set immediately
malfunction is detected)
S
Open or short in pressure control valve circuit
S
Open or short in pressure control valve
S
ECM
HINT:
These DTCs are set when the ignition switch is in the ON position.
WIRING DIAGRAM
05MRN--01
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E