Terminals Of Ecu

CHECK TRANSPONDER KEY AMPLIFIER (COIL)

Fig 1: Identifying Transponder Key Amplifier Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the 114 amplifier connector, and check the resistance between the terminal of the wire harness side connector and body ground.

Standard:

Checking I14 Amplifier Connector Specified Condition

Symbols (Terminal No.)	Wiring Color	Condition	Specified Condition
GND (114-7)- Body ground	BR-R - Body ground	Constant	Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

Reconnect the 114 amplifier connector, and check the resistance or voltage of each terminal of the connector.
Standard:

Fig 2: I14 Amplifier Connector Specified Condition Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, the amplifier may have a malfunction.
Inspect using an oscilloscope.
Waveform 1 (Reference):

L14 AMPLIFIER WAVEFORM 1 REFERENCE

Terminal	CODE - GND
Tool Setting	10 V/DIV., 10 ms/DIV.
Condition	Ignition switch ON

Fig 3: L14 Amplifier Waveform 1 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Waveform 2 (Reference):

L14 AMPLIFIER WAVEFORM 2 REFERENCE

Terminal	TXCT - GND
Tool Setting	10 V/DIV., 10 ms/DIV.
Condition	Ignition switch ON

Fig 4: L14 Amplifier Waveform 2 Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK TRANSPONDER KEY ECU ASSY

Fig 5: Identifying Transponder Key T6 ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the T6 ECU connector, and check the voltage and resistance between each terminal of the wire harness side connector.
Standard:

Fig 6: T6 ECU Connector Specified Condition Table (1 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the T6 ECU connector, and check the voltage between each terminal of the connector.
Standard:

Fig 7: T6 ECU Connector Specified Condition Table (2 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, the ECU may have a malfunction.
Inspect using an oscilloscope.

Waveform 1 (Reference):

T6 ECU WAVEFORM 1 REFERENCE DATA

Terminal	TXCT - GND
Tool Setting	5 V/DIV., 20 ms/DIV.
Condition	Ignition switch ON

Fig 8: Identifying T6 ECU Waveform 1

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Waveform 2 (Reference):

T6 ECU WAVEFORM 2 REFERENCE DATA

Terminal	CODE - GND
Tool Setting	10 V/DIV., 20 ms/DIV.
Condition	Ignition switch ON

Fig 9: Identifying T6 ECU Waveform 2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Waveform 3 (Reference):

T6 ECU WAVEFORM 3 REFERENCE DATA

Terminal	EFIO - GND
Tool Setting	5 V/DIV., 50 ms/DIV.
Condition	Ignition switch ON

Fig 10: Identifying T6 ECU Waveform 3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Waveform 4 (Reference):

T6 ECU WAVEFORM 4 REFERENCE DATA

Terminal	EFII - GND
Tool Setting	5 V/DIV., 50 ms/DIV.
Condition	Constant

Fig 11: Identifying T6 ECU Waveform 4

CHECK ECM

Fig 12: Identifying E4, E5, E6, E7 & E8 ECM Connector Terminals

Disconnect the E6 and E7 ECM connectors, and check the voltage or resistance between each terminal of the wire harness side connectors.

Standard:

CHECKING E6 AND E7 ECM CONNECTORS SPECIFIED CONDITION

Symbols (Terminal No.)	Wiring Color	Condition	Specified Condition
IMI (E5-27) - E1 (E6-1)	BR-R - BR	No key in ignition key cylinder --> With key	Waveform 1
IMO (E5-26) - E1 (E6-1)	BR-W - BR	No key in ignition key cylinder --> With key	Waveform 2
E1 (E6-1) - Body ground	BR - Body ground	Constant	Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

Inspect using an oscilloscope.
Waveform 1 (Reference):

E6 AND E7 ECM WAVEFORM 1 REFERENCE DATA

Terminal	IMI - GND
Tool Setting	5 V/DIV., 50 ms/DIV.
Condition	Ignition switch ON

Fig 13: Identifying E6 & E7 ECM Waveform 1

Waveform 2 (Reference):

E6 AND E7 ECM WAVEFORM 2 REFERENCE DATA

Terminal	IMO - GND
Tool Setting	5 V/DIV., 50 ms/DIV.
Condition	Constant

Fig 14: Identifying E6 & E7 ECM Waveform 2