Toyota Celica 2005 Repair Manual page 450

1 Check voltage between terminals VC and E2 of ECM connector.
ON
VC (+)
E2 (−)
A09084
OK
2 Check voltage between terminals PTNK and E2 of ECM connectors.
E2
Disconnect
NG
2005 CELICA (RM1131U)
DIAGNOSTICS
CHECK:
(a)
(b)
CHECK:
Measure the voltage between terminals VC and E2 of the ECM
connector.
OK:
A09092
NG
PREPARATION:
(a)
PTNK
(b)
CHECK:
Measure the voltage between terminals PTNK and E2 of the
ECM connectors.
NOTICE:
Vacuum applied to vapor pressure sensor must be less
Vacuum
than 66.7 kPa (500 mmHg, 19.7 in.Hg).
OK:
A21545
OK
− ENGINE (1ZZ−FE)
Remove the ECM cover.
Turn the ignition switch ON.
Voltage: 4.5 to 5.5 V
Replace ECM (See page SF−78).
Remove the ECM cover.
Turn the ignition switch ON.
(1) Disconnect the vacuum hose from the vapor pres-
sure sensor.
(2) Using the MITYVAC (Hand−Held Vacuum Pump),
apply a vacuum of 4.0 kPa (30 mmHg, 1.18 in.Hg)
to the vapor pressure sensor.
(3) Check the vapor pressure sensor output waveform
using a hand−held tester.
(1) Voltage: 2.9 to 3.7 V
(2) Voltage: 0.5 V or less
(3) A consecutive waveform presents.
Check for intermittent problems
(See page DI−3).
449
DI−251