Identifying condition LEXUS LS430 2003 Factory Repair Manual

Fig. 13: Identifying Waveform 2
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Waveform 3 (Reference):
WAVEFORM 3 REFERENCE TABLE
TerminalTXCT - GND
Tool Setting5 V/DIV., 20ms/DIV.
ConditionNo key in ignition key cylinder -> Key inserted

Fig. 16: Identifying Waveform 1
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Waveform 2 (Reference):
WAVEFORM 2 REFERENCE TABLE
TerminalRXCK - GND
Tool Setting5 V/DIV., 10 ms/DIV.
ConditionIgnition switch OFF -> ON
TerminalTXCT - GND
Tool Setting5 V/DIV., 20ms/DIV.
ConditionIgnition switch OFF -> ON

Fig. 17: Identifying Waveform 2
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Waveform 3 (Reference):
WAVEFORM 3 REFERENCE TABLE
TerminalCODE - GND
Tool Setting10 V/DIV., 20 ms/DIV.
ConditionIgnition switch OFF -> ON

Fig. 18: Identifying Waveform 3
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Waveform 4 (Reference):
WAVEFORM 4 REFERENCE TABLE
TerminalEFIO - GND
Tool Setting10 V/DIV., 500 ms/DIV.
ConditionIgnition switch OFF -> ON

Fig. 19: Identifying Waveform 4
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Waveform 5 (Reference):
WAVEFORM 5 REFERENCE TABLE
TerminalEFII - GND
Tool Setting10 V/DIV., 500 ms/DIV.
ConditionIgnition switch OFF -> ON

Fig. 22: Identifying Waveform 1
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Waveform 2 (Reference):
WAVEFORM 2 REFERENCE TABLE
TerminalIMO - GND
Tool Setting10 V/DIV., 500 ms/DIV.
ConditionNo key in ignition key cylinder -> Key inserted

Fig. 10: Identifying T8 Amplifier Connector Terminals
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a. Disconnect the T8 amplifier connector.
b. Measure the resistance of the wire harness side connector.
Standard:
TRANSPONDER KEY AMPLIFIER - RESISTANCE TABLE
If the result is not as specified, there may be a malfunction on the wire harness side.
c. Reconnect the T8 amplifier connector.
Symbols (Terminal No.)Wiring ColorTerminal
DescriptionConditionSpecified
Condition
GND (T8-7) - Body
groundV - Body
groundGroundAlwaysBelow 1 ohms

Fig. 11: Identifying Waveform 1 Graph
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Waveform 1 (Reference):
WAVEFORM 1 REFERENCE TABLE
Waveform 2 (Reference):
Fig. 12: Identifying Waveform 2 Graph

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WAVEFORM 2 REFERENCE TABLE
TerminalCODE - GND
Tool Setting10 V/DIV., 20 ms/DIV.
ConditionNo key in ignition key cylinder --> Key inserted
TerminalTXCT - GND
Tool Setting5 V/DIV., 20 ms/DIV.
ConditionNo key in ignition key cylinder --> Key inserted

2.CHECK TRANSPONDER KEY ECU ASSY
Fig. 13: Identifying T9 ECU Connector Terminals

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a. Disconnect the T9 ECU connector.
b. Measure the voltage and resistance of the wire harness side connector.
Standard:
TRANSPONDER KEY ECU - VOLTAGE TABLE
Symbols
(Terminal No.)Wiring
ColorTerminal
DescriptionConditionSpecified Condition
AGND (T9-13) - V - Body GroundAlwaysBelow 1 ohms

Fig. 14: Identifying Waveform 1 Graph
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WAVEFORM 1 REFERENCE TABLE
Waveform 2 (Reference):
TerminalTXCT - GND
Tool Setting5 V/DIV., 20 ms/DIV.
ConditionIgnition switch OFF --> ON