A02021
ON
VTA1 (+)
E2 (-)
A02022
ON
VC (+)
E2 (-)
DI-40
-
DIAGNOSTICS
ENGINE
194
Author:
Date:
2001 SIENNA (RM787U)
4
Check voltage between terminals VTA1 and E2 of ECM.
PREPARATION:
(a)
Remove the glove compartment (See page
).
(b)
Turn the ignition switch ON.
CHECK:
Measure voltage between terminals VTA1 and E2 of the ECM
connector.
OK:
Throttle valve
Voltage
Fully closed
0.3 - 1.0 V
Fully open
2.7 - 5.2 V
NG
Check for open and short in harness and con-
nector between ECM and throttle position sen-
sor (VTA line) (See page
OK
Check and replace ECM (See page
).
5
Check voltage between terminals VC and E2 of ECM.
PREPARATION:
(a)
Remove the glove compartment (See page
).
(b)
Turn the ignition switch ON.
CHECK:
Measure voltage between terminals VC and E2 of the ECM
connector.
OK:
Voltage: 4.5 - 5.5 V
NG
Check and replace ECM (See page
).
OK
Check for open in harness and connector be-
tween ECM and sensor (VC line) (See page
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