Engine Immobiliser System -- Terminals Of Ecu |
CHECK TRANSPONDER KEY AMPLIFIER |
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Measure the resistance and voltage according to the value(s) in the table below.
Inspection with Ignition Switch Off Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC G28-7 (AGND) - Body ground - L-O - Body ground Ground Always Below 1 Ω - G28-1 (VC5) - G28-7 (AGND) Input L - L-O Transponder key amplifier power supply No key in ignition key cylinder Below 1 V - G28-4 (CODE) - G28-7 (AGND) Output L-Y - L-O Demodulated signal of key code data No key in ignition key cylinder Below 1 V - G28-5 (TXCT) - G28-7 (AGND) Input L-B - L-O Key code output signal No key in ignition key cylinder Below 1 V - - If the result is not as specified, there may be a malfunction on the wire harness side.
Inspection of Waveforms of Communication Signals between Transponder Key Amplifier and Transponder Key ECU Assembly Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC G28-1 (VC5) - G28-7 (AGND) Input L - L-O Transponder key amplifier power supply No key in ignition key cylinder Below 1 V - BCC Malfunction
- Abnormal Status
- Different Encrypt Code
- Different Serial Number
Key inserted in ignition key cylinder 4.6 to 5.4 V G28-4 (CODE) - G28-7 (AGND) Output L-Y - L-O Demodulated signal of key code data No key in ignition key cylinder Below 1 V Key inserted in ignition key cylinder Pulse generation (See waveform 1) G28-5 (TXCT) - G28-7 (AGND) Input L-B - L-O Key code output signal No key in ignition key cylinder Below 1 V Key inserted in ignition key cylinder Pulse generation (See waveform 2) - If the result is not as specified, the amplifier may have a malfunction.
- If the result is not as specified, there may be a malfunction on the wire harness side.
Inspect using an oscilloscope.
- HINT:
- The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
Waveform 1 (Reference)
Measurement Condition Item Content Tester Connection G28-4 (CODE) - G28-7 (AGND) Tool Setting 5 V/DIV., 20 ms./DIV. Condition Key inserted in ignition key cylinder Waveform 2 (Reference)
Measurement Condition Item Content Tester Connection G28-5 (TXCT) - G28-7 (AGND) Tool Setting 5 V/DIV., 20 ms./DIV. Condition Key inserted in ignition key cylinder
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CHECK TRANSPONDER KEY ECU ASSEMBLY |
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Disconnect the G26 transponder key ECU assembly connector.
Measure the resistance and voltage according to the value(s) in the table below.
Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC G26-16 (GND) - Body ground - G - Body ground Ground Always Below 1 Ω - G26-1 (+B) - G26-16 (GND) Input L-Y - G Battery Always 11 to 14 V +B G26-2 (IG) - G26-16 (GND) Input B-O - G Ignition switch Ignition switch off Below 1 V IG SW Ignition switch ON 11 to 14 V G26-3 (KSW) - G26-16 (GND) Input BR - G Unlock warning switch No key in ignition key cylinder 10 kΩ or higher Key SW/B2780 Key inserted in ignition key cylinder Below 1 Ω - If the result is not as specified, there may be a malfunction on the wire harness side.
- If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the G26 transponder key ECU assembly connector.
Measure the resistance and voltage according to the value(s) in the table below.
Terminal No. (Symbol) Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item/DTC G26-14 (VC5) - G26-16 (GND) Input L - G Transponder key amplifier power supply No key in ignition key cylinder Below 1 V - BCC Malfunction
- Abnormal Status
- Different Encrypt Code
- Different Serial Number
Key inserted in ignition key cylinder 4.6 to 5.4 V G26-4 (TXCT) - G26-16 (GND) Input L-B - G Key code output signal No key in ignition key cylinder Below 1 V Key inserted in ignition key cylinder Pulse generation (See waveform 1) G26-15 (CODE) - G26-16 (GND) Output L-Y - G Demodulated signal of key code data No key in ignition key cylinder Below 1 V Key inserted in ignition key cylinder Pulse generation (See waveform 2) G26-7 (CTY) - G26-16 (GND) Input R-B - G Front door courtesy light switch (for Driver Side) Driver door closed 10 kΩ or higher D Door Courtesy SW Driver door open Below 1 Ω G26-13 (EFIO) - G26-16 (GND) Input Y-G - G ECM output signal Ignition switch off Below 1 V E/G Start Permission Ignition switch ON Pulse generation (See waveform 3) G26-12 (EFII) - G26-16 (GND) Output Y-B - G ECM input signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and reconnected Pulse generation (See waveform 4) E/G Start Permission G26-8 (IND) - G26-16 (GND) Output G-R - G Security indicator light signal Immobiliser set Alternating between 11 to 14 V and below 1 V - Immobiliser unset Below 1 V G26-9 (D) - G26-16 (GND) Input/Output B - G Diagnosis tester communication Always Pulse generation - G26-5 (AGND) - Body ground - L-O - Body ground Transponder key amplifier ground Always Below 1 Ω - - If the result is not as specified, the transponder key ECU assembly may have a malfunction.
- BCC Malfunction
Inspect using an oscilloscope.
- HINT:
- The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
Waveform 1 (Reference)
Measurement Condition Item Content Tester Connection G26-4 (TXCT) - G26-16 (GND) Tool Setting 5 V/DIV., 20 ms./DIV. Condition Key inserted in ignition key cylinder Waveform 2 (Reference)
Measurement Condition Item Content Tester Connection G26-15 (CODE) - G26-16 (GND) Tool Setting 5 V/DIV., 20 ms./DIV. Condition Key inserted in ignition key cylinder Waveform 3 (Reference)
Measurement Condition Item Content Tester Connection G26-13 (EFIO) - G26-16 (GND) Tool Setting 10 V/DIV., 100 ms./DIV. Condition Ignition switch ON Waveform 4 (Reference)
Measurement Condition Item Content Tester Connection G26-12 (EFII) - G26-16 (GND) Tool Setting 5 V/DIV., 500 ms./DIV. Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and reconnected
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CHECK ECM (for 2TR-FE) |

Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition G88-15 (IMO) - Body ground Y-B - Body ground Transponder key ECU assembly output signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected. Pulse generation (See waveform 1) G88-16 (IMI) - Body ground Y-G -Body ground Transponder key ECU assembly input signal Ignition switch off Below 1 V Ignition switch ON Pulse generation (See waveform 2) - If the result is not as specified, the ECM may have a malfunction.
- If the result is not as specified, the ECM may have a malfunction.
Inspect using an oscilloscope.
- HINT:
- The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
Waveform 1 (Reference)
Measurement Condition Item Content Tester Connection G88-15 (IMO) - Body ground Tool Setting 5 V/DIV., 500 ms./DIV. Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected. Waveform 2 (Reference)
Measurement Condition Item Content Tester Connection G88-16 (IMI) - Body ground Tool Setting 10 V/DIV., 100 ms./DIV. Condition Ignition switch ON
CHECK ECM (for 2TR-FBE) |

Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition G146-32 (IMO) - Body ground Y-B - Body ground Transponder key ECU assembly output signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected. Pulse generation (See waveform 1) G146-31 (IMI) - Body ground Y-G -Body ground Transponder key ECU assembly input signal Ignition switch off Below 1 V Ignition switch ON Pulse generation (See waveform 2) - If the result is not as specified, the ECM may have a malfunction.
- If the result is not as specified, the ECM may have a malfunction.
Inspect using an oscilloscope.
- HINT:
- The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
Waveform 1 (Reference)
Measurement Condition Item Content Tester Connection G146-32 (IMO) - Body ground Tool Setting 5 V/DIV., 500 ms./DIV. Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected. Waveform 2 (Reference)
Measurement Condition Item Content Tester Connection G146-31 (IMI) - Body ground Tool Setting 10 V/DIV., 100 ms./DIV. Condition Ignition switch ON
CHECK ECM (for 1KD-FTV, 2KD-FTV) |

Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition G38-29 (IMO) - Body ground Y-B - Body ground Transponder key ECU assembly output signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected. Pulse generation (See waveform 1) G38-30 (IMI) - Body ground Y-G -Body ground Transponder key ECU assembly input signal Ignition switch off Below 1 V Ignition switch ON Pulse generation (See waveform 2) - If the result is not as specified, the ECM may have a malfunction.
- If the result is not as specified, the ECM may have a malfunction.
Inspect using an oscilloscope.
- HINT:
- The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
Waveform 1 (Reference)
Measurement Condition Item Content Tester Connection G38-29 (IMO) - Body ground Tool Setting 5 V/DIV., 500 ms./DIV. Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected. Waveform 2 (Reference)
Measurement Condition Item Content Tester Connection G38-30 (IMI) - Body ground Tool Setting 10 V/DIV., 100 ms./DIV. Condition Ignition switch ON
CHECK TELEPHONE TRANSCEIVER ASSEMBLY (w/ Blocking System) |

Disconnect the G144 telephone transceiver assembly connector.
Measure the resistance and voltage according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition G144-6 (IG2) - G144-9 (E) B-O - W-B Ignition switch Ignition switch ON 11 to 14 V G144-9 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω G144-12 (+B) - G144-9 (E) L-Y - W-B Power supply Always 11 to 14 V - If the result is not as specified, there may be a malfunction on the wire harness side.
- If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the G144 telephone transceiver assembly connector.
Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition G144-1 (BLK1) - G144-9 (E) Y-B - W-B Transponder key ECU assembly output signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected. Pulse generation (See waveform 1) G144-2 (BLK4) - G144-9 (E) Y-G - W-B Transponder key ECU assembly input signal Ignition switch off Below 1 V Ignition switch ON Pulse generation (See waveform 2) G144-7 (BLK2) - G144-9 (E) Y-B - W-B ECM input signal Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected. Pulse generation (See waveform 1) G144-8 (BLK3) - G144-9 (E) Y-G - W-B ECM output signal Ignition switch off Below 1 V Ignition switch ON Pulse generation (See waveform 2) - If the result is not as specified, the telephone transceiver assembly may have a malfunction.
- If the result is not as specified, the telephone transceiver assembly may have a malfunction.
Inspect using an oscilloscope.
- HINT:
- The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
Waveform 1 (Reference)
Measurement Condition Item Content Tester Connection - G144-1 (BLK1) - G144-9 (E)
- G144-7 (BLK2) - G144-9 (E)
Tool Setting 5 V/DIV., 500 ms./DIV. Condition Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected. - G144-1 (BLK1) - G144-9 (E)
Waveform 2 (Reference)
Measurement Condition Item Content Tester Connection - G144-2 (BLK4) - G144-9 (E)
- G144-8 (BLK3) - G144-9 (E)
Tool Setting 10 V/DIV., 100 ms./DIV. Condition Ignition switch ON - G144-2 (BLK4) - G144-9 (E)