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A84868
ECM
Mass Air Flow Meter
Connector
THAF
ETHAF
A8
A54396
ETHAF
THAF
Wire Harness Side:
Mass Air Flow Meter Connector
A8
Front View
A54396
THAF
Wire Harness Side:
Mass Air Flow Meter Connector
A8
Front View
G34806
E23
ECM C onnector
THAF
05 -- 66
--
DIAGNOSTICS
ECD SYSTEM (1ND -- TV)
COROLLA Supplement (RM1129E)
2 READ VALUE USING I NTELLIGENT TESTER II(CHECK FOR O PEN IN WIRE
HARNESS)
(a) Disconnect the A8 mass air flow meter connector.
(b) Connect terminals THAF and ETHAF of the mass air flow
meter wire harness s ide c onnector.
(c) Connect the intelligent tester ll to the DLC3.
(d) Turn the ignition switch to ON and turn the intelligent tes -
ter l l ON.
(e) Select the following menu items: Powertrain / Engine and
ECT / Data List / Intake Air.
(f) Read the v alue.
Standard:
Temperature value: 135
°
C (275
°
F) or more
(g) Reconnect the mass air flow meter connector.
OK CONFIRM GOOD CONNECTION AT SENSOR. IF
OK, REPLACE MASS AIR FLOW METER
NG
3 CHECK HARNESS AND CONNECTOR(MASS AIR FLOW M ETER -- ECM)
(a) Disconnect the A8 mass air flow meter connector.
(b) Disconnect the E23 ECM connector.
(c) Check the resistance.
Standard (Check for open):
Tester Connection
Specified Condition
THA (A8--4) -- THAF (E23--7)
Below 1
Ω
(d)
Reconnect the mass air flow meter connector.
(e)
Reconnect the ECM connector.
NG
REPAIR
OR
REPLACE
HARNESS
OR
CONNECTOR
OK
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E