BE6653
P24310
A00099
ON
1
(+)
(-)
A02017
VG
(+)
(-)
DI-24
-
DIAGNOSTICS
ENGINE
178
Author:
Date:
2001 SIENNA (RM787U)
Type II
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
OK
3
Check voltage between terminal VG of ECM connector and body ground.
PREPARATION:
(a)
Remove the glove compartment (See page
).
(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
).
NG
4
Check for open and short in harness and connector between mass air flow meter
and ECM (See page
).
NG
Repair or replace harness or connector.
OK
Содержание RM787U
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