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B51903
Pushed
Not Pushed
B58517
B58697
B58768
U1
Unlock Warning Switch Assy
Wire Harness Side
T7
Transponder Key ECU
KSW
1
2
05--400
--
DIAGNOSTICS
ENGINE IMMOBILIZER SYSTEM (1ND--TV)
COROLLA Supplement (RM1129E)
2
INSPECT UNLOCK WARNING SWITCH ASSY
(a)
Remove the switch.
(b)
Measure the resistance of the switch.
Standard:
Tester Connection
Switch Condition
Specified Condition
1 -- 2
Pushed
Below 1
Ω
1 -- 2
Not pushed
10 k
Ω
or higher
NG
REPLACE UNLOCK WARNING SWITCH ASSY
OK
3
CHECK WIRE HARNESS (UNLOCK WARNING SWITCH ASSY -- TRANSPONDER
KEY ECU ASSY AND BODY GROUND)
(a)
Disconnect the T7 ECU connector.
(b)
Disconnect the U1 switch connector.
(c)
Measure the resistance of the wire harness side connec-
tors.
Standard:
Tester Connection
Specified Condition
T7--9 (KSW) -- U1--2
Below 1
Ω
U1--1 -- Body ground
Below 1
Ω
NG
REPAIR
OR
REPLACE
HARNESS
AND
CONNECTOR
OK
REPLACE TRANSPONDER KEY ECU ASSY
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E