Toyota RM787U, Service And Repair Manual, Page: 562 / 1976

BE6653
P24310 A00099
ON
1
(+)
(-)
A02017
VG
(+) (-)
DI-24
- DIAGNOSTICS ENGINE
178
Author: Date:
2001 SIENNA (RM787U)
Type II Go to step 5.
2 Check voltage of mass air flow meter power source.
PREPARATION:
(a)
Disconnect the mass air flow meter connector.
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal 1 of the mass air flow
meter connector and body ground.
OK:
Voltage: 9 - 14 V
NG Check for open in harness and connector be-
tween EFI main relay (Marking: EFI) and mass
air flow meter (See page
IN-31 ).
OK
3 Check voltage between terminal VG of ECM connector and body ground.
PREPARATION:
(a)
Remove the glove compartment (See page SF-83 ).
(b) Start the engine.
CHECK:
Measure the voltage between terminal VG of the ECM connec-
tor and body ground while the engine is idling.
OK:
Voltage:
1.1 - 1.5 V (P or N position and A/C switch OFF)
OK Check and replace ECM (See page IN-31 ).
NG
4 Check for open and short in harness and connector between mass air flow meter
and ECM (See page
IN-31 ).
NG Repair or replace harness or connector.
OK