Toyota ZZT230 series Repair Manual page 236

CHECK:
Read mass air
RESULT:
Mass air flow rate
2
Check voltage of mass air flow meter power source.
)
3 Check voltage between tennlnal
) c:J
OJAGNOSTlCS
flow rate on the 080 scan tool or
II
ENGINE
TOYOTA hand-held tester.
Type
I
0.0
Go to step 2.
Goto step 5.
PREPARATION:
{a) Disconnect the mass air flow meter connector.
(b) Turn ignition switch
CHECK:
Measure voltage between terminal 4 of mass air flow meter con·
nectar and body ground.
14
OK: 9
-
L>
Voltage: V
Check for open In harness and connector be­
tween EFI main relay (Marking: EFI) and mass
air flow meter (See page IN-30).
VG
of ECM connector and body ground.
PREPARATION:
(a) Remove the
ECM
(b) Start the engine.
CHECK:
Measure voltage between terminal
ground while engine is idling.
OK:
1. 1
Voltage:
-
V (P o r N
1.5
Check and replace ECM (See page IN-30).
II
Type
271.0 or more
ON.
cover.
of
ECM
VG
po
sit i o n and AJC switch OFF)
Dl-25
and body