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A99067
MREL
15
3
EFI MAIN Relay
B--W
2
IE4
EFI
1
B
5
1
1A
1
1
1
1
1
2
Battery
FL
MAIN
E23
EVG
ECM
36
EB1
R--W
G
B--O
L--Y
VG
Engine Room R/B and J/B
4
3
6
A8
Mass Air Flow Meter
GR
E23
EB1
8
E24
2
VG
E2G
B--W
1
+B
D
E
J47
J48
J49
J/C
J/C
42
1
B--W
B--W
R--W
R--W
B--W
A
A
05--56
--
DIAGNOSTICS
ECD SYSTEM (1ND--TV)
COROLLA Supplement (RM1129E)
HINT:
When DTC P0100 is detected, check the air--flow ratio by selecting Powertrain / Engine and ECT / Data List
/ AFM on the intelligent tester II.
Air Flow Value (g/second)
Malfunction
Always approximately 0.3 or less
S
Open in mass air flow meter power source circuit
S
Open or short in VG circuit
Always 110.0 or more
S
Open in EVG circuit
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using an intelligent tester ll. Freeze frame data record the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction oc-
curred.
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E