05LV E -- 02
B58084
T6
5 4 3 2 1
B55023
GND
--
DIAGNOSTICS
ENGINE IMMOBILIZER SYSTEM (1ND -- TV)
05 -- 387
COROLLA Supplement (RM1129E)
TERMINALS OF ECU
1. CHECK TRANSPONDER KEY AMPLIFIER
(a) Disconnect the T6 amplifier connector.
(b) Measure the resistance of the wire harness side connector.
Standard:
Symbols (Terminal No.)
Wiri ng Color
Terminal Description
Condition
Specified Condition
GND (T6 -- 3) --
Body ground
R -- B ody ground
Ground
Always
Below 1
Ω
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the T6 amplifier connector.
(d) Measure the voltage of the connector.
Standard:
Symbols (Terminal No.)
Wiri ng Color
Terminal Description
Condition
Specified Condition
+B (T6 -- 5) -- GND (T6 -- 3)
B -- R
Power s ource
No key i n i gnition key
cylinder
0 V
+B (T6 -- 5) -- GND (T6 -- 3)
B -- R
Power s ource
Key i nserted
10 to 14 V
CODE (T6--2) --
GND (T6--3)
P -- R
Demodulated signal of
transponder ID data
No key in ignition key
cylinder
CODE (T6--2) --
GND (T6--3)
P -- R
Demodulated signal of
transponder ID data
Key inserted
RXCK (T6--4) --
GND (T6--3)
V -- R
Clock signal
No key in ignition key
cylinder
RXCK (T6--4) --
GND (T6--3)
V -- R
Clock signal
Key inserted
TXCT (T6--1) --
GND (T6--3)
G -- R
Key code output signal
No key in ignition key
cylinder
TXCT (T6--1) --
GND (T6--3)
G -- R
Key code output signal
Key inserted
If the result is not as specified, the amplifier may have a malfunction.
(e)
Inspect using an oscilloscope.
Waveform 1 (Reference):
Terminal
CODE -- GND
Tool Setting
10 V/DIV., 10 msec./DIV.
Condition
No key in ignition key cylinder
→
key inserted
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E