Engine Immbiliser (Diagnostics - Introduction): Diagnosis Lexus HS I

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

1. Use the following procedure to troubleshoot the engine immobiliser system.

1. *: Using the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. CUSTOMER PROBLEM ANALYSIS HINT: When troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred. Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases. The following 5 items are important points in the problem analysis: What Vehicle model, system name When Date, time, occurrence frequency Where Road conditions Under what conditions? Driving conditions, weather conditions How did it happen? Problem symptoms NEXT: Go to next step
3. INSPECT BATTERY VOLTAGE Measure the battery voltage with the power switch off. Standard Voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step. NEXT: Go to next step
4. POWER SWITCH ON (IG) NEXT: Go to next step
5. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* Use the Techstream to check if the CAN communication system is functioning normally. Result Result Proceed to ECU is connected, communication is normal A ECU is connected, communication is abnormal B B --> GO TO CAN COMMUNICATION SYSTEM. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398235-S17886579092011051600000) A: Go to next step
6. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* Use the Techstream to check if the LIN communication system is functioning normally. Result Result Proceed to No DTC is output A DTC is output (DTC B2287, B2785, B2786, B2789 or B278C) B B --> GO TO LIN COMMUNICATION SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398321-S18993057102011051600000) A: Go to next step
7. CHECK FOR DTCS (ENGINE IMMOBILISER SYSTEM)* Check for DTCs and note any codes that are output. Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398102-S02087029272011051600000) . Recheck for DTCs. Based on the DTCs output above, try to duplicate the engine immobiliser system DTC by simulating the symptoms indicated by the DTCs. Result Result Proceed to No DTCs are output A Engine immobiliser system DTC is output B B --> GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398102-S14310442702011051600000) A: Go to next step
8. CHECK FOR DTCS (HYBRID CONTROL SYSTEM)* Clear the DTCs. Refer to «DTC CHECK / CLEAR»(ref-398094-S29961611252011051600000) . Recheck for DTCs. HINT: The DTCs for the engine immobiliser system are specified above. If other codes are output, check the DTC chart for the hybrid control system. Result Result Proceed to No DTCs are output A Engine immobiliser system DTC is output (DTC B2799, B279A or B279C) B Hybrid control system DTC is output (except DTC B2799, B279A and B279C) C B --> GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398102-S14310442702011051600000) C --> GO TO HYBRID CONTROL SYSTEM. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398094-S11405263312011051600000) A: Go to next step
9. PROBLEM SYMPTOMS TABLE Refer to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE»(ref-398102-S11706678352011051600000) . Result Result Proceed to Fault is not listed in Problem Symptoms Table A Fault is listed in Problem Symptoms Table B B --> Go to step 11 . A: Go to next step
10. OVERALL ANALYSIS AND TROUBLESHOOTING* Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST»(ref-398102-S32882302932011051600000) Terminals of ECU. Refer to «TERMINALS OF ECU»(ref-398102-S11789249122011051600000) NEXT: Go to next step
11. REPAIR OR REPLACE NEXT: Go to next step
12. CONFIRMATION TEST NEXT --> END

Scheme 1

Scheme 2

1. DESCRIPTION OF CODE REGISTRATION HINT: The ID codes are the same as recognition codes for the wireless transmitter and engine immobiliser function. Registering an ID code enables the smart access system with push-button start, the wireless door lock control function and the engine immobiliser function to be operated. Code registration is necessary when the certification ECU (smart key ECU assembly), ID code box (immobiliser code ECU), transmission control ECU assembly or key is replaced with a new one. The key (for card type) can be registered using the same procedure as the key (for standard). When the A/C memory call function needs to be registered after replacing and registering a key, refer to Air Conditioning System. Refer to «REGISTRATION»(ref-398247-S26130053982011051600000) . When registering a key, bring the key close to the power switch as shown in the illustration.
2. KEY REGISTRATION PROCEDURES WHEN ADDING OR REPLACING KEY OR WHEN KEY IS LOST HINT: The following procedures require the use of the Techstream: - New key ID registration - Additional key ID registration - Key ID erasure A maximum of 7 keys can be registered. Registration Procedure Condition Procedure Refer to Registering an additional key Customer must bring at least 1 key 1. Register additional keys as necessary (additional key ID registration) PROCEDURE "C" Replacing a key Making a lost key unable HINT: After key ID erasure, any remaining keys that are not registered at this time cannot be used. Therefore, after key ID erasure, register all remaining keys. Customer must bring at least 1 key 1. Using remaining keys, clear all registered keys except one (key ID erasure) PROCEDURE "D" 2. Register additional keys as necessary (additional key ID registration) PROCEDURE "C" All keys are lost - 1. Reset all keys (all keys ID erasure (key code reset)) PROCEDURE "E" 2. Register all keys (new key ID registration) PROCEDURE "A"
3. PART REPLACEMENT AND KEY REGISTRATION PROCEDURES The following table shows ECU replacement and key registration procedures for cases in which a malfunctioning ECU has been identified through the troubleshooting of the smart access system with push-button start. HINT: The following procedures can be performed: New key ID registration Additional key ID registration Key ID erasure All key ID erasure ECU code registration If the customer has not brought all the registered keys, replacement of the transmission control ECU assembly or ID code box (immobiliser code ECU) is also required. A maximum of 7 keys can be registered. Malfunctioning ECU Condition Procedure Reference Certification ECU (Smart key ECU assembly) Customer has brought all keys 1. Replace certification ECU (smart key ECU assembly) - 2. Reregister all keys (new key ID registration) PROCEDURE "B" Some keys are lost Key ID codes can be registered and erased 1. Erase key codes (key ID erasure) PROCEDURE "D" 2. Perform additional key registration procedure (additional key ID registration) PROCEDURE "C" 3. Replace certification ECU (smart key ECU assembly) - 4. Reregister all keys (new key ID registration) HINT: If some keys are not registered during the above steps, they will be disabled because they cannot be registered later. PROCEDURE "B" Key ID codes cannot be either registered or erased 1. Replace certification ECU (smart key ECU assembly) - 2. Replace ID code box (immobiliser code ECU) - 3. Reregister all keys (new key ID registration) HINT: If some keys are not registered during the above steps, they will be disabled because they cannot be registered later. PROCEDURE "A" 4. Register ECU communication ID PROCEDURE "G" Certification ECU (Smart key ECU assembly) All keys are lost 1. Replace certification ECU (smart key ECU assembly) - 2. Replace ID code box (immobiliser code ECU) - 3. Reregister all keys (new key ID registration) HINT: If some keys are not registered during the above steps, they will be disabled because they cannot be registered later. PROCEDURE "A" 4. Register ECU communication ID PROCEDURE "G" ID code box (Immobiliser code ECU) Customer has brought at least 1 key 1. Replace ID code box (immobiliser code ECU) - 2. Register recognition codes in ECUs (ECU code registration) PROCEDURE "F" 3. Register ECU communication ID PROCEDURE "G" All keys are lost 1. Replace ID code box (immobiliser code ECU) - 2. Replace certification ECU (smart key ECU assembly) - 3. Reregister all keys (new key ID registration) HINT: If some keys are not registered during the above steps, they will be disabled because they cannot be registered later. PROCEDURE "A" 4. Register ECU communication ID PROCEDURE "G" Transmission control ECU assembly Customer has brought at least 1 key 1. Replace transmission control ECU assembly - 2. Register recognition codes in ECUs (ECU code registration) PROCEDURE "F" All keys are lost 1. Replace transmission control ECU assembly - 2. Replace certification ECU (smart key ECU assembly) - 3. Replace ID code box (immobiliser code ECU) - 4. Reregister all keys (new key ID registration) HINT: If some keys are not registered during the above steps, they will be disabled because they cannot be registered later. PROCEDURE "A" 4. Register ECU communication ID PROCEDURE "G" Power management control ECU No condition required Replace power management control ECU - Hybrid vehicle control ECU No condition required Replace hybrid vehicle control ECU
4. KEY REGISTRATION PROCEDURE "A" New key ID registration (when replacing the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU), or when replacing the certification ECU (smart key ECU assembly), ID code box (immobiliser code ECU) and transmission control ECU assembly) Process Procedure 1. Start of registration Connect the Techstream to DLC3 Turn the power switch on (IG) Enter the following menus: Body Electrical / Smart Access / Utility / Smart Code Registration HINT: The power switch cannot be turned on (IG) more than 10 times. After connecting the Techstream, turn the Techstream on while turning the driver door courtesy light switch on and off repeatedly at 1.5-second intervals or less to continue key registration procedure. 2. Confirmation of ECU code Perform operation according to prompts on the Techstream screen HINT: Mode is automatically selected by the Techstream (new registration mode or add mode). 3. Verification of unregistered key*1 Hold the unregistered key close to the power switch (for details, refer to 1 Description of Code Registration) Confirm that the wireless door lock buzzer sounds once (short beep) Place the unregistered key on the driver seat Confirm that the wireless door lock buzzer sounds once (short beep) 4. Registration of ID code Perform operation according to prompts on the Techstream screen 5. End of registration Finish new key ID code registration *1: Repeat this process for each key which is to be registered for the vehicle. Finish the procedure for each key within 30 seconds. If the procedure for any of the keys has not been finished within the specified time, perform the registration procedures again from process 1. Make sure that only 1 key is in the cabin during the registration procedures. If 2 or more keys are in the cabin simultaneously, electric waves will interfere with each other, preventing normal registration. PROCEDURE "B" New key ID registration (when replacing the certification ECU (smart key ECU assembly)) Process Procedure 1. Start of registration Connect the Techstream to DLC3 Turn the power switch on (IG) Enter the following menus: Body Electrical / Smart Access / Utility / Smart Code Registration HINT: The power switch cannot be turned on (IG) more than 10 times. After connecting the Techstream, turn the Techstream on while turning the driver door courtesy light switch on and off repeatedly at 1.5-second intervals or less to continue key registration procedure. 2. Confirmation of ECU code Perform operation according to prompts on the Techstream screen HINT: Mode is automatically selected by the Techstream (new registration mode or add mode). 3. Confirmation of all registered keys*1 Hold the registered key close to the power switch (for details, 1 Description of Code Registration) Confirm that wireless door lock buzzer sounds once (short beep) 4. Confirmation of ECU code Perform operation according to prompts on the Techstream screen 5. Verification of unregistered key*2 Hold the unregistered key close to the power switch (for details, refer to 1 Description of Code Registration) Confirm that the wireless door lock buzzer sounds once (short beep) Place the unregistered key on the driver seat Confirm that the wireless door lock buzzer sounds once (short beep) 6. Registration of ID code Perform operation according to prompts on the Techstream screen 7. End of registration Finish new key ID code registration *1: Repeat this process for each key which is not to be registered for the vehicle. Finish the procedure for each key within 30 seconds. If the procedure for any of the keys has not been finished within the specified time, perform the registration procedures again from process 1. If the key confirmation procedure for a key is performed, the security indicator light comes on and remains on until all the keys are confirmed. *2: Repeat this process for each key which is to be registered for the vehicle. Finish the procedure for each key within 30 seconds. If the procedure for any of the keys has not been finished within the specified time, perform the registration procedures again from process 1. Make sure that only 1 key is in the cabin during the registration procedures. If 2 or more keys are in the cabin simultaneously, electric waves will interfere with each other, preventing normal registration. PROCEDURE "C" Additional key ID registration Process Procedure 1. Start of registration Connect the Techstream to DLC3 Turn the power switch on (IG) Enter the following menus: Body Electrical / Smart Access / Utility / Smart Code Registration 2. Confirmation of registered key*1 Perform operation according to prompts on the Techstream screen HINT: Mode is automatically selected by the Techstream (new registration mode or add mode) Hold the registered key close to the power switch (for details, refer to 1 Description of Code Registration) Confirm that the wireless door lock buzzer sounds once (short beep) 3. Confirmation of ECU code Perform operation according to prompts on the Techstream screen 4. Verification of unregistered key*2 Hold the unregistered key close to the power switch (for details, refer to 1 Description of Code Registration) Confirm that the wireless door lock buzzer sounds once (short beep) Place the unregistered key on driver seat Confirm that the wireless door lock buzzer sounds once (short beep) 5. Registration of ID code Perform operation according to prompts on the Techstream screen 6. End of registration Finish additional key ID code registration *1: Perform this process for one of the keys which are to be registered for the vehicle. Finish the procedure within 30 seconds. If the procedure has not been finished within the specified time, perform the registration procedures again from process 1. *2: Repeat this process for each key which is to be registered for the vehicle. Finish the procedure for each key within 30 seconds. If the procedure for any of the keys has not been finished within the specified time, perform the registration procedures again from process 1. Make sure that only 1 key is in the cabin during the registration procedures. If 2 or more keys are in the cabin simultaneously, electric waves will interfere with each other, preventing normal registration. PROCEDURE "D" Key ID erasure HINT: Procedure "D" erases all registered key codes except one. NOTE: Do not erase all registered key codes except one key (for card type) while the smart access system with push-button start system key cancel is activated. By doing so, the smart access system with push-button start system cannot be returned to its original condition using the key cancel operation. Refer to «CUSTOMIZE PARAMETERS»(ref-398314-S02797034662011051600000) . In addition, the entry unlock switching function. Refer to «CUSTOMIZE PARAMETERS»(ref-398314-S02797034662011051600000) cannot be used. However, erasing all registered key codes except one key (for card type) will not cause problems if registering additional keys (for standard). Process Procedure 1. Start of erasure Connect the Techstream to DLC3 Turn the power switch on (IG) Enter the following menus: Body Electrical / Smart Access / Utility / Smart Code Erasure 2. Confirmation of registered key*1 HINT: Select the key that will not be erased. Perform operation according to prompts on the Techstream screen Hold the registered key close to the power switch (for details, refer to 1 Description of Code Registration) Confirm that the wireless door lock buzzer sounds once (short beep) 3. Confirmation of ECU code Perform operation according to prompts on the Techstream screen 4. Erasure of ID code Perform operation according to prompts on the Techstream screen 5. End of erasure Finish key ID code erasure *1: Perform this process for one of the keys which are to be registered for the vehicle. Finish the procedure within 30 seconds. If the procedure has not been finished within the specified time, perform the erasure procedure again from process 1. PROCEDURE "E" All key ID erasure HINT: Procedure "E" erases all the key codes registered in the vehicle. Process Procedure 1. Start of erasure Connect the Techstream to DLC3 Turn the Techstream on while turning driver door courtesy light switch on and off repeatedly at 1.5-second intervals or less Enter the following menus: Body Electrical / Smart Access / Utility / Smart Code Rest Read the "Seed Number" of the Techstream screen and input into TIS Input the "Pass-Code Number" sent from TIS according to the Techstream screen 2. Confirmation of ECU code Perform operation according to prompts on the Techstream screen 3. Erasure of ID code Perform operation according to prompts on the Techstream screen Wait for 15 minutes 4. End of erasure Finish key ID code erasure PROCEDURE "F" ECU code registration Process Procedure 1. Start of registration Connect the Techstream to DLC3 Turn the power switch on (IG) Enter the following menus: Body Electrical / Smart Access / Utility / ECU Communication ID Registration / ID Code Box and Steering Lock 2. Confirmation of registered key*1 Hold the registered key close to the power switch (for details, refer to 1 Description of Code Registration) Confirm that the wireless door lock buzzer sounds once (short beep) 3. Registration of ECU code Perform operation according to prompts on the Techstream screen 4. End of registration Finish ECU code registration *1: Perform this process for one of the keys which are to be registered for the vehicle. Finish the procedure within 30 seconds. If the procedure has not been finished within the specified time, perform the erasure procedures again from process 1. PROCEDURE "G" ECU communication ID registration NOTE: The ECU communication ID should be registered when the ID code box (immobiliser code ECU) is replaced in order to match these ECU communication IDs. The hybrid control system cannot be started unless the ECU communication IDs match. After the registration, pressing the power switch may not start the hybrid control system on the first try. If so, press the power switch again. Clear DTC B2799 (code for hybrid vehicle control ECU immobiliser communication error) by either of the following: - Use the Techstream. - Disconnect the cable from the negative (-) battery terminal for 30 seconds. Using SST, connect terminals TC and CG of the DLC3. SST: 09843-18040 Turn the power switch on (IG) and leave it as is for 30 minutes. HINT: Do not start the hybrid control system. Turn the power switch off and disconnect terminals TC and CG. Check that the hybrid control system starts and remains READY for more than 3 seconds.

PROBLEM SYMPTOMS TABLE

HINT

1. Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
2. Inspect the fuses and relays related to this system before inspecting the suspected areas below.

ENGINE IMMOBILISER SYSTEM

Scheme 3

Scheme 4

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Scheme 13

Scheme 14

1. CHECK POWER SWITCH Disconnect the F2 power switch connector. Measure the resistance according to the value(s) in the table below. HINT: Measure the values on the wire harness side with the connector disconnected. Tester Connection Wiring Color Terminal Description Condition Specified Condition F2-8 (AGND) - Body ground G - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction in the wire harness. Reconnect the F2 power switch connector. Measure the voltage according to the value(s) in the table below. Tester Connection Wiring Color Terminal Description Condition Specified Condition F2-9 (TXCT) - F2-8 (AGND) GR - G Key code output signal Power switch off 30 seconds after door opened and closed Brake pedal not depressed Below 1 V F2-9 (TXCT) - F2-8 (AGND) GR - G Key code output signal Power switch off Key not in cabin Power switch pressed within 30 seconds Pulse generation (See waveform 1 (Scheme 4) ) F2-10 (CODE) - F2-8 (AGND) R - G Demodulated signal of key code data Power switch off 30 seconds after door opened and closed Brake pedal not depressed Below 1 V F2-10 (CODE) - F2-8 (AGND) R - G Demodulated signal of key code data Power switch off Key battery removed Power switch touched with key and pressed Pulse generation (See waveform 2 (Scheme 5) ) F2-14 (VC5) - F2-8 (AGND) P - G Power supply Power switch off 30 seconds after door opened and closed Brake pedal not depressed Below 1 V F2-14 (VC5) - F2-8 (AGND) P - G Power supply Power switch off Key not in cabin Power switch pressed within 30 seconds Pulse generation (See waveform 3 (Scheme 6) ) If the result is not as specified, the power switch may have a malfunction. Inspect using an oscilloscope. Waveform 1 (Reference) Item Content Tester Connection F2-9 (TXCT) - F2-8 (AGND) Tool Setting 2 V/DIV., 50 ms./DIV. Condition Power switch off Key not in cabin Power switch pressed within 30 seconds Waveform 2 (Reference) Item Content Tester Connection F2-10 (CODE) - F2-8 (AGND) Tool Setting 2 V/DIV., 50 ms./DIV. Condition Power switch off Key battery removed Power switch touched with key and pressed Waveform 3 (Reference) Item Content Tester Connection F2-14 (VC5) - F2-8 (AGND) Tool Setting 2 V/DIV., 200 ms./DIV. Condition Power switch off Key not in cabin Power switch pressed within 30 seconds
2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Disconnect the F50 certification ECU (smart key ECU assembly) connector. Measure the resistance and voltage according to the value(s) in the table below. HINT: Measure the values on the wire harness side with the connector disconnected. Tester Connection Wiring Color Terminal Description Condition Specified Condition F50-1 (+B) - F50-15 (E) R - W-B +B power supply Power switch off 11 to 14 V F50-15 (E) - Body ground W-B - Body ground Ground Always Below 1 ohms F50-17 (CUTB) - F50-15 (E) GR - W-B Dark current cut fuse pin input signal Power switch off 11 to 14 V If the result is not as specified, there may be a malfunction in the wire harness. Reconnect the F50 certification ECU (smart key ECU assembly) connector. Measure the resistance and voltage according to the value(s) in the table below. Tester Connection Wiring Color Terminal Description Condition Specified Condition F50-2 (IND) - Body ground G - Body ground Security indicator light signal Power switch on (IG) Security indicator light off Below 2 V F50-2 (IND) - Body ground G - Body ground Security indicator light signal Power switch off Security indicator light blinks Pulse generation F50-12 (TXCT) - F50-36 (AGND) GR - G Power switch TXCT output Power switch off 30 seconds after door opened and closed Brake pedal not depressed Below 1 V F50-12 (TXCT) - F50-36 (AGND) GR - G Power switch TXCT output Power switch off Key not in cabin Power switch pressed within 30 seconds Pulse generation (See waveform 1 see scheme 10 ) F50-13 (CODE) - F50-36 (AGND) R - G Power switch CODE input Power switch off 30 seconds after door opened and closed Brake pedal not depressed Below 1 V F50-13 (CODE) - F50-36 (AGND) R - G Power switch CODE input Power switch off Key battery removed Power switch touched with key and pressed Pulse generation (See waveform 2 see scheme 11 ) F50-16 (IG) - F50-15 (E) W - W-B IG power supply Power switch off Below 1 V F50-16 (IG) - F50-15 (E) W - W-B IG power supply Power switch on (IG) 11 to 14 V F50-28 (VC5) - F50-36 (AGND) P - G Power switch power supply Power switch off 30 seconds after door opened and closed Brake pedal not depressed Below 1 V F50-28 (VC5) - F50-36 (AGND) P - G Power switch power supply Power switch off Key not in cabin Power switch pressed within 30 seconds Pulse generation (See waveform 3 see scheme 12 ) F50-36 (AGND) - Body ground G - Body ground Power switch ground Always Below 1 ohms If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction. Inspect using an oscilloscope. Waveform 1 (Reference) Item Content Tester Connection F50-12 (TXCT) - F50-36 (AGND) Tool Setting 2 V/DIV., 50 ms./DIV. Condition Power switch off Key not in cabin Power switch pressed within 30 seconds Waveform 2 (Reference) Item Content Tester Connection F50-13 (CODE) - F50-36 (AGND) Tool Setting 2 V/DIV., 50 ms./DIV. Condition Power switch off Key battery removed Power switch touched with key and pressed Waveform 3 (Reference) Item Content Tester Connection F50-28 (VC5) - F50-36 (AGND) Tool Setting 2 V/DIV., 200 ms./DIV. Condition Power switch off Key not in cabin Power switch pressed within 30 seconds
3. CHECK ID CODE BOX (IMMOBILISER CODE ECU) Disconnect the F16 ID code box (immobiliser code ECU) connector. Measure the resistance and voltage according to the value(s) in the table below. HINT: Measure the values on the wire harness side with the connector disconnected. Tester Connection Wiring Color Terminal Description Condition Specified Condition F16-1 (+B) - F16-8 (GND) R - W-B +B power supply Power switch off 11 to 14 V F16-8 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction in the wire harness. Reconnect the F16 ID code box (immobiliser code ECU) connector. Measure the voltage according to the value(s) in the table below. Tester Connection Wiring Color Terminal Description Condition Specified Condition F16-5 (EFII) - F16-8 (GND) G - W-B Hybrid vehicle control ECU output signal Power switch off 11 to 14 V F16-5 (EFII) - F16-8 (GND) G - W-B Hybrid vehicle control ECU output signal Within 3 seconds after power switch on (READY), or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected Pulse generation (See waveform 1 (Scheme 9) ) F16-6 (EFIO) - F16-8 (GND) Y - W-B Hybrid vehicle control ECU input signal Power switch off Below 1 V F16-6 (EFIO) - F16-8 (GND) Y - W-B Hybrid vehicle control ECU input signal Power switch on (IG) Pulse generation (See waveform 2 (Scheme 10) ) If the result is not as specified, the ID code box (immobiliser code ECU) may have a malfunction. Inspect using an oscilloscope. Waveform 1 (Reference) Item Content Tester Connection F16-5 (EFII) - F16-8 (GND) Tool Setting 5 V/DIV., 500 ms./DIV. Condition Within 3 seconds after power switch on (READY), or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected Waveform 2 (Reference) Item Content Tester Connection F16-6 (EFIO) - F16-8 (GND) Tool Setting 5 V/DIV., 50 ms./DIV. Condition Power switch on (IG)
4. CHECK TRANSMISSION CONTROL ECU ASSEMBLY Disconnect the A35 and A36 transmission control ECU assembly connectors. Measure the voltage and resistance according to the value(s) in the table below. HINT: Measure the values on the wire harness side with the connectors disconnected. Tester Connection Wiring Color Terminal Description Condition Specified Condition A35-15 (BATT) - Body ground P - Body ground Battery power supply Power switch off 11 to 14 V A36-1 (E1) - Body ground W-B - Body ground Ground Always Below 1 ohms A36-5 (E02) - Body ground W-B - Body ground Ground Always Below 1 ohms A36-6 (E01) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction in the wire harness.
5. CHECK POWER MANAGEMENT CONTROL ECU Disconnect the F52 power management control ECU connector. Measure the voltage and resistance according to the value(s) in the table below. HINT: Measure the values on the wire harness side with the connector disconnected. Tester Connection Wiring Color Terminal Description Condition Specified Condition F52-1 (AM22) - Body ground R - Body ground Battery power supply Power switch off 11 to 14 V F52-2 (AM21) - Body ground L - Body ground Battery power supply Power switch off 11 to 14 V F52-5 (GND2) - Body ground W-B - Body ground Ground Always Below 1 ohms F52-6 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction in the wire harness.
6. CHECK HYBRID VEHICLE CONTROL ECU NOTE: Do not measure voltage or waveform directly at the sealed side of the hybrid vehicle control ECU connectors. Doing so may damage the connectors because these connectors are waterproof. Tester Connection Wiring Color Terminal Description Condition Specified Condition A58-41 (IMO) - C28-14 (E1) G - W-B ID code box (immobiliser code ECU) input signal Power switch off 11 to 14 V A58-41 (IMO) - C28-14 (E1) G - W-B ID code box (immobiliser code ECU) input signal Within 3 seconds after power switch on (READY), or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected Pulse generation (See waveform 1 see scheme 19 ) A58-42 (IMI) - C28-14 (E1) Y - W-B ID code box (immobiliser code ECU) output signal Power switch off Below 1 V A58-42 (IMI) - C28-14 (E1) Y - W-B ID code box (immobiliser code ECU) output signal Power switch on (IG) Pulse generation (See waveform 2 see scheme 20 ) Waveform 1 (Reference) Item Content Tester Connection A58-41 (IMO) - C28-14 (E1) Tool Setting 5 V/DIV., 500 ms./DIV. Condition Within 3 seconds after power switch on (READY), or within 3 seconds after power switch first turned on (IG) after battery disconnected and connected Waveform 2 (Reference) Item Content Tester Connection A58-42 (IMI) - C28-14 (E1) Tool Setting 5 V/DIV., 50 ms./DIV. Condition Power switch on (IG)
7. CHECK INTEGRATION CONTROL AND PANEL ASSEMBLY Disconnect the F57*1 or F59*2 integration control and panel assembly connector. *1: w/ Navigation System *2: w/o Navigation System Measure the voltage and resistance according to the value(s) in the table below. HINT: Measure the values on the wire harness side with the connector disconnected. W/ NAVIGATION SYSTEM Tester Connection Wiring Color Terminal Description Condition Specified Condition F57-3 (GND) - Body ground W-B - Body ground Ground (Signal ground) Always Below 1 ohms F57-8 (+B) - Body ground LG - Body ground Battery Power switch off 11 to 14 V W/O NAVIGATION SYSTEM Tester Connection Wiring Color Terminal Description Condition Specified Condition F59-3 (GND) - Body ground W-B - Body ground Ground (Signal ground) Always Below 1 ohms F59-8 (+B) - Body ground LG - Body ground Battery Power switch off 11 to 14 V If the result is not as specified, there may be a malfunction in the wire harness. Reconnect the F57*1 or F59*2 integration control and panel assembly connector. *1: w/ Navigation System *2: w/o Navigation System Measure the voltage according to the value(s) in the table below. W/ NAVIGATION SYSTEM Tester Connection Wiring Color Terminal Description Condition Specified Condition F57-9 (IG+) - Body ground P - Body ground Power switch signal Power switch off Below 1 V F57-9 (IG+) - Body ground P - Body ground Power switch signal Power switch on (IG) 11 to 14 V F57-10 (LP) - Body ground Y - Body ground Security indicator light signal Power switch on (IG) Security indicator light off Below 2 V F57-10 (LP) - Body ground Y - Body ground Security indicator light signal Power switch off Security indicator light blinks Pulse generation W/O NAVIGATION SYSTEM Tester Connection Wiring Color Terminal Description Condition Specified Condition F59-9 (IG+) - Body ground P - Body ground Power switch signal Power switch off Below 1 V F59-9 (IG+) - Body ground P - Body ground Power switch signal Power switch on (IG) 11 to 14 V F59-10 (LP) - Body ground Y - Body ground Security indicator light signal Power switch on (IG) Security indicator light off Below 2 V F59-10 (LP) - Body ground Y - Body ground Security indicator light signal Power switch off Security indicator light blinks Pulse generation If the result is not as specified, the integration control and panel assembly may have a malfunction.

DIAGNOSIS SYSTEM

1. DESCRIPTION The certification ECU (smart key ECU assembly) and hybrid vehicle control ECU control the vehicle engine immobiliser system functions. Engine immobiliser system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3). In some cases, a malfunction may be occurring in the engine immobiliser system even though the security indicator light is not illuminated. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.
2. CHECK DLC3 Check the DLC3. Refer to «GENERAL INFORMATION»(ref-398089-S21707799022011051600000) .
3. INSPECT BATTERY VOLTAGE Measure the battery voltage with the power switch off. Standard Voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery.

DTC CHECK / CLEAR

1. CHECK FOR CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) DTC Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Access / Trouble Codes. Check the details of the DTC(s). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398102-S14310442702011051600000) .
2. CHECK FOR HYBRID VEHICLE CONTROL ECU DTC Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / HV Control / Trouble Codes. Check the details of the DTC(s). Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398102-S14310442702011051600000) for engine immobiliser system) Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-398094-S11405263312011051600000) for hybrid control system)
3. CLEAR CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) DTC Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Access / Trouble Codes. Clear the DTCs.
4. CLEAR HYBRID VEHICLE CONTROL ECU DTC Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / HV Control / Trouble Codes. Clear the DTCs.

DATA LIST / ACTIVE TEST

1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time. NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Access / Data List. Read the Data List according to the display on the Techstream. SMART ACCESS (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) Tester Display Measurement Item/Range Normal Condition Ignition Switch Power switch on (IG) signal/ON or OFF ON: Power switch on (IG) or hybrid control system started OFF: Power switch off # Codes Number of trouble codes/Min.: 0 or Max.: 255 Number of DTCs will be displayed Immobilizer when IG=ON Immobiliser system status when power switch on (IG)/SET or UNSET SET: Power switch off UNSET: Power switch on (IG) or hybrid control system started Immobiliser Immobiliser system status/Set or Unset Set: Power switch off Unset: Power switch on (IG) or hybrid control system started Master Key Master key code signal/Match or NoMatch Match: Master key code sent NoMatch: Unmatched master key code sent Sub Key Sub-key (master key) code signal/Match or NoMatch Match: Sub-key (master key) code sent NoMatch: Unmatched sub-key (master key) code sent BCC Malfunction Transponder chip signal/OK or NG OK: Correct data sent NG: Incorrect data sent Abnormal Status Transponder chip data/OK or NG OK: Data OK NG: Data error Different Encrypt Code Transponder chip signal/OK or NG OK: Correct data sent NG: Incorrect data sent Different Serial Number Transponder chip signal/OK or NG OK: Correct data sent NG: Incorrect data sent Frame Error Transponder chip signal/OK or NG OK: Correct data sent NG: Incorrect data sent Response Transponder chip signal/OK or NG OK: Correct data sent NG: Incorrect data sent Wireless C Code Wireless C Code/No Regd or Regd No Regd: Wireless C Code not registered Regd: Wireless C Code registered ID-BOX Sleep Condition ID code box (immobiliser code ECU) condition/Yes or No Yes: ID code box (immobiliser code ECU) in sleep condition No: ID code box (immobiliser code ECU) not in sleep condition ID-BOX Start Condition ID code box (immobiliser code ECU) condition/Yes or No Yes: ID code box (immobiliser code ECU) sends wake up signal No: ID code box (immobiliser code ECU) not send wake up signal Engine Start Request ID code box (immobiliser code ECU) start request condition/OK or NG OK: Start request condition signal received NG: Start request condition signal not received 3bit Code Request 3bit code reception status/OK or NG OK: 3 bit code received NG: 3 bit code not received S Code Check S code verification result/OK or NG OK: Verification confirmed NG: Verification not confirmed L Code Check L code verification result/OK or NG OK: Verification confirmed NG: Verification not confirmed Unlock Request Receive Unlock command reception status/OK or NG OK: Unlock request received NG: Unlock request not received Lock Request Receive Lock command reception status/OK or NG OK: Lock request received NG: Lock request not received S Code Check (Past) S code verification result (past)/OK or NG(Past) OK: Verification confirmed (past) NG(Past): Verification not confirmed (past) L Code Check (Past) L code verification result (past)/OK or NG(Past) OK: Verification confirmed (past) NG(Past): Verification not confirmed (past) EFI Code Receive HV code receive (when DTC stored)/OK or NG OK: HV code received NG: HV code not received EFI Communication HV communication/OK or NG OK: HV communication normal NG: HV communication abnormal
2. ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Access / Active Test. Perform the Active Test according to the display on the Techstream. SMART ACCESS (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) Tester Display Test Part Control Range Immobiliser Indicator Security indicator light ON or OFF

DIAGNOSTIC TROUBLE CODE CHART

HINT

If a trouble code is stored during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See service information " below.

1. CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) DIAGNOSTIC TROUBLE CODE CHART CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) DTC Code Detection Item Trouble Area See B2784 Antenna Coil Open / Short 1. Wire harness or connector 2. Power switch 3. Certification ECU (Smart key ECU assembly) Refer to «DTC B2784: Antenna Coil Open / Short»(ref-398335-S09516025672011051600000) B278A Short to GND in Immobiliser System Power Source Circuit 1. Wire harness or connector 2. Power switch 3. Certification ECU (Smart key ECU assembly) Refer to «DTC B278A: Short to GND in Immobiliser System Power Source Circuit»(ref-398335-S41033425412011051600000) B2790 ID BOX EEPROM Malfunction 1. ID code box (Immobiliser code ECU) 2. Certification ECU (Smart key ECU assembly) Refer to «DTC B2790: ID BOX EEPROM Malfunction»(ref-398335-S36849478212011051600000)
2. HYBRID VEHICLE CONTROL ECU DIAGNOSTIC TROUBLE CODE CHART HINT: The DTCs for the engine immobiliser system are specified above. If the other codes are output, check the DTC chart for the hybrid control system. HYBRID VEHICLE CONTROL ECU DTC Code Detection Item Trouble Area See B2799 Engine Immobiliser System Malfunction 1. Wire harness or connector 2. Hybrid vehicle control ECU 3. ID code box (Immobiliser code ECU) Refer to «DTC B2799: Engine Immobiliser System Malfunction»(ref-398335-S32523722532011051600000) B279A Theft Deterrent System Communication Line High Fixation 1. Wire harness or connector 2. Hybrid vehicle control ECU 3. ID code box (Immobiliser code ECU) Refer to «DTC B279A: Theft Deterrent System Communication Line High Fixation»(ref-398335-S12412974092011051600000) B279C Theft Deterrent System Presence Detection Hybrid vehicle control ECU Refer to «DTC B279C: Theft Deterrent System Presence Detection»(ref-398335-S23884235452011051600000)