B58697
B85950
B85945
T7
Transponder Key ECU Assy
E24
ECM
IMI
IMO
EFII
EFIO
Wire Harness Side
05--394
--
DIAGNOSTICS
ENGINE IMMOBILIZER SYSTEM (1ND--TV)
COROLLA Supplement (RM1129E)
INSPECTION PROCEDURE
HINT:
Before troubleshooting for this DTC, make sure no transponder key ECU codes are present. If a transponder
key ECU code is present, troubleshoot it first.
1
CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSY -- ECM)
(a)
Disconnect the T7 ECU connector.
(b)
Disconnect the E24 ECM connector.
(c)
Measure the resistance of the wire harness side connec-
tors.
Standard:
Tester Connection
Specified Condition
T7--11 (EFIO) -- E24--6 (IMI)
Below 1
Ω
T7--10 (EFII) -- E24--4 (IMO)
Below 1
Ω
T7--11 (EFIO) or E24--6 (IMI) --
Body ground
10 k
Ω
or higher
T7--10 (EFII) or E24--4 (IMO) --
Body ground
10 k
Ω
or higher
NG
REPAIR
OR
REPLACE
HARNESS
AND
CONNECTOR
OK
REPLACE ECM
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E