Toyota RM787U, Service And Repair Manual

Page: 578 / 1976

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 SF-83 ).
(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
IN-31 ).
OK
Check and replace ECM (See page IN-31 ).
5 Check voltage between terminals VC and E2 of ECM.
PREPARATION:
(a)
Remove the glove compartment (See page SF-83 ).
(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 IN-31 ).
OK
Check for open in harness and connector be-
tween ECM and sensor (VC line) (See page
IN-31 ).