Toyota ZZT230 series, Repair Manual

Page: 236 / 821

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Dl-25
OJAGNOSTlCS ENGINE
CHECK:
Read mass air
flow rate on the
080
II
scan tool or TOYOTA hand-held tester.
RESULT:
2
Mass air flow rate
Type
I
0.0
Go to step 2.
Goto step 5.
Type
II
271.0 or more
Check voltage of mass air flow meter power source.
PREPARATION:
{a) Disconnect the mass air flow meter connector.
(b) Turn ignition switch
ON.
CHECK:
Measure voltage between terminal 4 of mass air flow meter con·
nectar and body ground.
OK:
Voltage:
9
-
14
V
L>
Check for open In harness and connector be­
tween EFI main relay (Marking: EFI) and mass
air flow meter (See page IN-30).
3 Check
voltage between tennlnal
VG
of ECM connector and body ground.
PREPARATION:
(a)
Remove the
ECM
cover.
(b) Start the engine.
CHECK:
Measure voltage between terminal
VG
of ECM and body
ground while engine is idling.
OK:
Voltage:
1.1
-
1.5
V (P
o
r N
po
sit
i
o
n
and AJC switch OFF)
Check and replace ECM (See page IN-30).
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