Smart Access System (Keyless Start) (Diagnostics - Introduction): Diagnosis Lexus IS III

PROBLEM SYMPTOMS TABLE [04/2013 - ]

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 the system before inspecting the suspected areas below.
3. If the problem occurs in certain locations or times of day, the possibility of wave interference is high.
4. If a malfunction occurred after optional components were installed at the dealer, check if there is wave interference from the components.

SMART ACCESS SYSTEM WITH PUSH-BUTTON START (FOR START FUNCTION)

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1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Disconnect the K6 and A13 certification ECU (smart key 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 connector disconnected. Tester Connection Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item A13-12 (STA) - Body ground Input R - Body ground When starting the engine, this monitors the voltage sent from terminal STAR to the starter relay to judge whether the engine is "being started". 20°C (68°F) 106.78 to 115.98 ohms - A13-10 (STAR) - Body ground Input/Output L - Body ground Outputs voltage to the starter relay Outputs voltage (12 V) to the starter relay when starting the engine. (Max. 30 sec. Turns off when an engine speed of 500 rpm or more continues for 500 ms or more.) HINT: When Hi is selected, a start request signal (STAR) will not be output even though a start request signal (STSW) is input. Shift lever in any position other than P or N --> Shift lever in P or N (at 20°C (68°F)) 10 kohms or higher --> 107.05 to 116.33 ohms - Receives neutral start switch (P, N position detection) signal Monitors whether the neutral start switch is on (P or N) or off (other than P or N). Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly). When the neutral start switch is on, due to the starter relay coil resistance (small) using some of the voltage, the voltage at terminal STAR will be low (2.7 V or less), and when the neutral start switch is off, the voltage will be high (9 V or more). Perform the following operations except while the engine is cranking: Shift lever in any position other than P or N --> Shift lever in P or N (at 20°C (68°F)) 30 kohms or higher --> 107.05 to 116.33 ohms Neutral SW/ Clutch SW A13-14 (NE) - Body ground Input B - Body ground Engine speed signal Always 10 kohms or higher Engine Condition A13-2 (STP1) - Body ground Input R - Body ground Stop light switch signal Brake pedal depressed --> Brake pedal released 9 V or higher --> 1 V or less Stop Light Switch1 K6-10 (+B) - K6-11 (E) Input BE - BR Power source Always 11 to 14 V - K6-23 (SLP) - K6-11 (E) Input R - BR Steering lock position signal Steering locked 10 kohms or higher Steering Unlock Switch K6-22 (P) - K6-11 (E) Input LG - BR P position signal Shift lever in P --> Shift lever not in P 30 kohms or higher --> Below 200 ohms Shift P Signal K6-11 (E) - Body ground - BR - Body ground GND Always Below 1 ohms - K6-18 (SSW2) - Body ground Input L - Body ground SSW2 contact signal HINT: Backup for SSW1. Behaves the same way as SSW1. Engine switch pushed --> Engine switch not pushed Below 15 ohms --> 10 kohms or higher Start Switch2 K6-16 (SSW1) - Body ground Input GR - Body ground SSW1 contact signal Engine switch pushed --> Engine switch not pushed Below 15 ohms --> 10 kohms or higher Start Switch1 K6-9 (ACCD) - Body ground Output P - Body ground ACC signal 20°C (68°F) 130.92 to 190.74 ohms ACC Relay Monitor A13-3 (IG1D) - Body ground Output V - Body ground IG signal 20°C (68°F) 87.32 to 127.14 ohms IG Relay Monitor (Outside) K6-5 (SPD) - Body ground Input L - Body ground Vehicle speed signal Always 30 kohms or higher Vehicle Speed Signal Reconnect the K6 and A13 certification ECU (smart key ECU assembly) connectors. Measure the voltage and check for pulses according to the value(s) in the table below. Tester Connection Input/Output Wiring Color Terminal Description Condition Specified Condition Related Data List Item A13-12 (STA) - K6-11 (E) Input R - BR When starting the engine, this monitors the voltage sent from terminal STAR to the starter relay to judge whether the engine is "being started". With the brake pedal depressed, the engine switch is pressed and held (starter on) --> After approx. 1 sec. has elapsed, the engine switch is released (starter off) 6 V or higher* --> 1.0 V or less - A13-10 (STAR) - K6-11 (E) Input/Output L - BR Outputs voltage to the starter relay Outputs voltage (12 V) to the starter relay when starting the engine. (Max. 30 sec. Turns off when an engine speed of 500 rpm or more continues for 500 ms or more.) HINT: When Hi is selected, a start request signal (STAR) will not be output even though a start request signal (STSW) is input. With the brake pedal depressed, the engine switch is pressed and held --> After approx. 1 sec. has elapsed, the engine switch is released 6 V or higher* --> 1.0 V or less - Receives neutral start switch (P, N position detection) signal Monitors whether the neutral start switch is on (P or N) or off (other than P or N). Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly). When the neutral start switch is on, due to the starter relay coil resistance (small) using some of the voltage, the voltage at terminal STAR will be low (2.7 V or less), and when the neutral start switch is off, the voltage will be high (9 V or more). Perform the following operations except while the engine is cranking: Shift lever in any position other than P or N --> Shift lever in P or N (at 20°C (68°F)) 9 V or higher --> 2.7 V or less Neutral SW/ Clutch SW A13-14 (NE) - K6-11 (E) Input B - BR Engine speed signal Idling (engine warmed up) Pulse generation (See waveform 1) Engine Condition A13-2 (STP1) - K6-11 (E) Input R - BR Stop light switch signal Brake pedal released --> Brake pedal depressed 1 V or less --> 9 V or higher Stop Light Switch1 K6-23 (SLP) - K6-11 (E) Input R - BR Steering lock position signal Steering locked --> Steering unlocked 11 to 14 V --> 1.5 V or less Steering Unlock Switch K6-24 (SLR+) - K6-11 (E) Output W - BR Steering lock motor operation command signal (Steering lock motor operation permission signal sent from the certification ECU (smart key ECU assembly)) When a door is opened, the steering lock motor will be operated if all of the following conditions are met: The steering is unlocked. The engine switch is off. The shift lever is in P. Pulse generation (See waveform 2) - K6-22 (P) - K6-11 (E) Input LG - BR P position signal Shift lever in P --> Shift lever not in P 9 V or higher --> 2.76 V or less Shift P Signal K6-18 (SSW2) - K6-11 (E) Input L - BR SSW2 contact signal HINT: Backup for SSW1. Behaves the same way as SSW1. Engine switch not pushed --> Engine switch pushed 9 V or higher --> 1 V or less Start Switch2 K6-16 (SSW1) - K6-11 (E) Input GR - BR SSW1 contact signal Engine switch not pushed --> Engine switch pushed 9 V or higher --> 1 V or less Start Switch1 K6-9 (ACCD) - K6-11 (E) Output P - BR ACC signal Engine switch off --> Engine switch on (ACC) 1 V or less --> 8.5 V or higher ACC Relay Monitor A13-3 (IG1D) - K6-11 (E) Output V - BR IG signal Engine switch on (ACC) --> Engine switch on (IG) 1 V or less --> 9 V or higher IG Relay Monitor (Outside) K6-5 (SPD) - K6-11 (E) Input L - BR Vehicle speed signal Vehicle being driven at approx. 5 km/h (3 mph) Pulse generation (See waveform 3) Vehicle Speed Signal HINT: *: While the engine is cranking, the battery voltage may drop to approximately 6 V. The waveform of the steering lock actuator motor stopped can be checked without performing any particular operation. The waveform of the steering lock actuator motor operating can be checked if either of the following operations is performed: To unlock the steering, bring the electrical key transmitter sub-assembly into the cabin and turn the engine switch on (ACC) or on (IG). To lock the steering, open a door with the engine switch off and the shift lever in P. Using an oscilloscope, check the waveform of the ECU. NOTE: The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown. Waveform 1 Item Content Tester Connection A13-14 (NE) - K6-11 (E) Tool Setting 2 V/DIV., 2 ms./DIV. Condition Idling (engine warmed up) HINT: The wavelength becomes shorter as the engine speed increases. Waveform 2 *a Steering lock motor not operating *b Steering lock motor operating Item Content Tester Connection K6-24 (SLR+) - K6-11 (E) Tool Setting 2 V/DIV., 200 ms./DIV. Condition Steering lock motor stopped --> Steering lock motor operating --> Steering lock motor stopped Waveform 3 Item Content Tester Connection K6-5 (SPD) - K6-11 (E) Tool Setting 5 V/DIV., 20 ms./DIV. Condition Vehicle being driven at approx. 5 km/h (3 mph) HINT: The wavelength becomes shorter as the vehicle speed increases.
2. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Refer to «TERMINALS OF ECU [04/2013 - ]»(ref-665555-S17722975582014102400000)
3. CHECK ID CODE BOX (IMMOBILIZER CODE ECU) Refer to «TERMINALS OF ECU [04/2013 - ]»(ref-665555-S17722975582014102400000)
4. CHECK ECM Refer to «TERMINALS OF ECU [04/2013 - ]»(ref-665555-S17722975582014102400000)
5. CHECK ENGINE SWITCH Refer to «TERMINALS OF ECU [04/2013 - ]»(ref-665555-S17722975582014102400000)

DIAGNOSIS SYSTEM [04/2013 - ]

1. DESCRIPTION Smart access system with push-button start (for Start Function) data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. 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 [04/2013 - ]»(ref-665529-S26412111322014102400000)
3. INSPECT BATTERY VOLTAGE Measure the battery voltage. Standard Voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery.

DTC CHECK / CLEAR [04/2013 - ]

Note. When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.

1. CHECK FOR DTC (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (POWER SOURCE CONTROL)) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Trouble Codes. Body Electrical > Power Source Control > Trouble Codes Check for DTCs.
2. CHECK FOR DTC (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (SMART ACCESS)) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Access / Trouble Codes. Body Electrical > Smart Access > Trouble Codes Check for DTCs.
3. CHECK FOR DTC (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (STARTING CONTROL)) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Starting Control / Trouble Codes. Body Electrical > Starting Control > Trouble Codes Check for DTCs.
4. CLEAR DTC (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (POWER SOURCE CONTROL)) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Trouble Codes. Body Electrical > Power Source Control > Clear DTCs Clear the DTCs by following the directions on the Techstream display.
5. CLEAR DTC (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (SMART ACCESS)) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Smart Access / Trouble Codes. Body Electrical > Smart Access > Clear DTCs Clear the DTCs by following the directions on the Techstream display.
6. CLEAR DTC (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (STARTING CONTROL)) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Starting Control / Trouble Codes. Body Electrical > Starting Control > Clear DTCs Clear the DTCs by following the directions on the Techstream display.

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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 engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / (desired system) / Data List. Read the Data List according to the display on the Techstream. Body Electrical > Power Source Control > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Shift P Signal Shift position P OFF or ON OFF: Shift lever not in P ON: Shift lever in P Use this item to determine whether the shift lever position switch (P) is malfunctioning. Steering Unlock Switch State of steering unlock sensor signal output from steering lock ECU (steering lock actuator assembly) OFF or ON OFF: Steering locked ON: Steering unlocked When the shift lever is in P and the engine switch is off, if any door is opened or closed, the steering is locked. When the electrical key transmitter sub-assembly is in the cabin and the engine switch is turned on (ACC) or on (IG), the steering unlocks. The engine cannot be started when the steering unlock signal is off. Stop Light Switch1 State of brake pedal OFF or ON OFF: Brake pedal released ON: Brake pedal depressed Use this item to determine whether the stop light switch is malfunctioning. The engine cannot be started when this item is OFF. If the stop light switch is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time. Start Switch1 Engine switch 1 status OFF or ON OFF: Engine switch not pressed ON: Engine switch pressed If the engine switch is pressed for a short time, the display may not change. Use this item to determine whether the engine switch input signal is malfunctioning. Start Switch2 Engine switch 2 status OFF or ON OFF: Engine switch not pressed ON: Engine switch pressed Backup for engine switch 1. However, when the engine switch is pressed and held, the control functions only when both engine switch 1 and 2 are normal. Behaves the same way as engine switch 1. Neutral SW/ Clutch SW Shift position (P and N) OFF or ON OFF: Shift lever in any position other than P or N ON: Shift lever in P or N Use this item to determine whether the park/neutral start switch assembly is malfunctioning. When the engine cannot be started due to a park/neutral start switch assembly malfunction, OFF is displayed. Latch Circuit Status of IG related backup circuits OFF or ON OFF: Engine switch off ON: Engine switch on (IG) Displays in almost the same manner as the IG relay. When the engine switch is on (ACC), OFF is displayed. Starter Request Signal Engine start request signal status OFF or ON OFF: After approx. 1 second has elapsed, the engine switch is released ON: With the shift lever in P and the brake pedal depressed, the engine switch is pressed and held When the engine cannot be started due to a start request signal malfunction, OFF is displayed. When the engine switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the engine switch needs to be pressed and held for a certain period of time. ACC Relay Monitor ACC relay activation OFF or ON OFF: Engine switch off ON: Engine switch on (ACC) When the engine switch is on (IG), ON is displayed. While the engine is cranking, OFF is displayed. Engine Condition Engine state Stop or Run Stop: Engine stopped Run: Engine running - Vehicle Speed Signal Vehicle being driven or stopped Stop or Run Stop: Vehicle stopped Run: Vehicle being driven at 5 km/h (3 mph) or more - Power Supply Condition Power supply state All OFF, ACC ON, IG ON or ST ON All OFF: Engine switch off (ACC and IG) ACC ON: Engine switch on (ACC) IG ON: Engine switch on (IG) ST ON: Sending engine start request signal - Powertrain Type Vehicle identification HV-AT, Cnv-MT, Cnv-AT, Cnv-MMT, S&S-MT, S&S-AT or S&S-MMT Cnv-AT: Conventional A/T models (w/o hybrid system) - Starter SW Sig Mismatch Engine switch signal 1 and 2 do not match No or Yes No: Switch normal Yes: Switch malfunctioning (Engine switch signal 1 and 2 do not match) Even when Yes is displayed, the engine can be started. However, emergency engine off while driving by pressing and holding the engine switch, and when the brakes are malfunctioning, emergency engine starting by pressing and holding the engine switch cannot be performed. Park Signal Mismatch P position signal malfunction No or Yes No: Signal normal Yes: Signal malfunction (CAN communication and direct line signal do not match) Even when Yes is displayed, it is still possible to turn the engine switch off (the power source mode will not be stuck in on (ACC) or on (IG)). Str Lock/Unlock Wait T-Out Steering lock or unlock malfunction No or Yes No: Lock and unlock normal Yes: Lock or unlock malfunction (e.g. steering lock is stuck etc.) When the engine cannot be started due to a steering lock or unlock malfunction, Yes is displayed. Key Certif Wait T-Out Key verification malfunction No or Yes No: Verification normal Yes: Verification error (Detected due to the electrical key transmitter sub-assembly ID code and the ID code stored in the certification ECU (smart key ECU assembly) not matching) When the engine cannot be started due to a key verification error, Yes is displayed. IG Circuit IG relay coil circuit malfunction OK or NG OK: Circuit normal NG: Circuit malfunctioning Use this item to determine whether the IG relay is malfunctioning. When the engine cannot be started due to an IG relay malfunction, NG is displayed. IG Relay Monitor (Outside) IG relay coil voltage monitor status OFF or ON OFF: Engine switch off ON: Engine switch on (IG) Use this item to determine whether the IG relay is malfunctioning. When the engine switch is on (ACC), OFF is displayed. IG Relay Monitor (Inside) IG relay activation OFF or ON OFF: Engine switch off ON: Engine switch on (IG) Use this item to determine whether the IG relay is malfunctioning. When the engine switch is on (ACC), OFF is displayed. Number of Diagnosis Code Number of DTCs 0 to 255 - - HINT: To check if the Data List display changes, get into the vehicle while carrying an electrical key transmitter sub-assembly and perform the following operations with the engine switch off and the shift lever in P. *1: Press the engine switch with the brake pedal released and check that the engine switch turns on (ACC). *2: Press the engine switch with the brake pedal released and check that the engine switch turns on (IG). *3: Depress the brake pedal (stop light switch is on). *4: Press the engine switch with the brake pedal depressed and check that the engine starts. *5: Press the engine switch with the brake pedal depressed and check that the engine switch turns off. *6: Release the brake pedal. *7: Open a door. Body Electrical > Smart Access > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Key Low Battery Transmitter battery depleted No or Yes No: Transmitter battery not depleted Yes: Transmitter battery depleted The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. The certification ECU (smart key ECU assembly) displays "Yes" for the "Key Low Battery" item of the Data List when this voltage information indicates 2.2 V or less. This Data List item should be checked when the electrical key transmitter sub-assembly is at room temperature (example: at -20°C (-4°F), "Yes" may be displayed even if the transmitter battery is new). # Codes Number of DTCs 0 to 255 - - Immobilizer Immobilizer system status determined by certification ECU (smart key ECU assembly) Set or Unset Set: Immobilizer set (engine start prohibited) (engine switch off) Unset: Immobilizer unset (engine start permitted) (engine switch on (ACC) or on (IG)) The engine cannot be started when Set is displayed. HINT: The security indicator light blinks when Set is displayed. The security indicator light is linked with set/unset of the immobilizer and not linked with lock/unlock of the steering. Steering Lock Sleep Cond Steering lock ECU sleep availability No or Yes No: Sleep not available Yes: Sleep available - Steering Lock Start Cond Steering lock ECU wake up signal status No or Yes No: Wake up signal not sent Yes: Wake up signal sent - Engine Start Condition Status of engine start permission signal determined by steering lock ECU (steering lock actuator assembly) and sent to certification ECU (smart key ECU assembly) NG or OK NG: Engine start prohibited OK: Engine start permitted When OK is displayed, the certification ECU (smart key ECU assembly) receives an unlock confirmation signal from the steering lock ECU (steering lock actuator assembly) and makes fuel injection and engine starting possible. The engine cannot be started when NG is displayed. Sensor Value History of malfunction of position sensor in steering lock ECU (steering lock actuator assembly) (DTC B2781 is stored) OK or NG(Past) OK: History of malfunction for the lock or unlock sensor in the steering lock ECU (steering lock actuator assembly) does not exist. NG(Past): History of both the lock and unlock sensors in the steering lock ECU (steering lock actuator assembly) being on exists. (Under normal operation, neither sensor is on.) When NG(Past) is displayed, either the position sensor in the steering lock ECU (steering lock actuator assembly) or the assembly itself may be malfunctioning. Power Supply Short History of signal error (short) sent from certification ECU (smart key ECU assembly) to steering lock ECU (steering lock actuator assembly) (DTC B2782 is stored) OK or NG(Past) OK: History of motor power source short does not exist NG(Past): History of motor power source short exists This item displays history of a malfunction in the circuit between the certification ECU (smart key ECU assembly) and the steering lock ECU (steering lock actuator assembly). Motor Driver Short History of malfunction (short) in steering lock ECU (steering lock actuator assembly) motor circuit (DTC B2781 is stored) OK or NG(Past) OK: History of short in the motor circuit does not exist NG(Past): History of short in the motor circuit exists This item displays history of a malfunction in the steering lock motor circuit in the steering lock ECU (steering lock actuator assembly). Lock/Unlock Receive History of receiving an unlock request signal No or Yes No: History of receiving an unlock request signal does not exist Yes: History of receiving an unlock request signal exists - Lock Bar Stuck Error History of steering not being able to unlock properly when steering lock operates for a certain period of time OK or NG(Past) OK: History of steering lock being stuck does not exist NG(Past): History of steering lock being stuck exists - Engine Start Request Immobilizer unset (engine start permitted) signal from certification ECU (smart key ECU assembly) to ID code box (immobilizer code ECU) received state OK or NG OK: Signal received NG: Signal not received The ID code box (immobilizer code ECU) receives the immobilizer unset (engine start permitted) signal from the certification ECU (smart key ECU assembly) and permits fuel injection and ignition when OK is displayed. The engine cannot be started when NG is displayed. S Code Check Verification result between certification ECU (smart key ECU assembly) and ID code box (immobilizer code ECU) OK or NG OK: Verification result normal NG: Verification result abnormal When NG is displayed: The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is not registered, or the certification ECU (smart key ECU assembly) or ID code box (immobilizer code ECU) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started). L Code Check Verification result between ID code box (immobilizer code ECU) and steering lock ECU (steering lock actuator assembly) OK or NG OK: Verification result normal NG: Verification result abnormal When NG is displayed: The ID code for the ID code box (immobilizer code ECU) or steering lock ECU (steering lock actuator assembly) is not registered, or the ID code box (immobilizer code ECU) or steering lock ECU (steering lock actuator assembly) is malfunctioning. The steering cannot be locked. The steering cannot be unlocked (the engine cannot be started). Unlock Request Receive Unlock request signal received state OK or NG OK: Unlock request signal received within 10 seconds of engine switch on (IG) or on (ACC), or of an engine start operation being performed NG: Engine switch not turned on (IG) or on (ACC), and engine start operation not performed The engine cannot be started when an unlock request signal cannot be received. If OK is not displayed even though the steering unlock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning. Lock Request Receive Lock request signal received state OK or NG OK: Lock request signal received for 10 seconds. of any of the doors being opened with shift lever in P and engine switch off. NG: Except above If OK is not displayed even though the steering lock conditions are met, the certification ECU (smart key ECU assembly) may be malfunctioning. S Code Check(Past) Verification result history between the certification ECU (smart key ECU assembly) and ID code box (immobilizer code ECU) OK or NG(Past) OK: History of abnormal verification result does not exist NG(Past): History of abnormal verification result exists - L Code Check(Past) Verification result history between the ID code box (immobilizer code ECU) and steering lock ECU (steering lock actuator assembly) OK or NG(Past) OK: History of abnormal verification result does not exist NG(Past): History of abnormal verification result exists - Steering Lock Steering lock ECU (steering lock actuator assembly) lock confirmation status Unset or Set Unset: Lock not confirmed Set: Lock confirmed When Unset is displayed, the steering is not locked. Steering Unlock Steering lock ECU (steering lock actuator assembly) unlock confirmation status Unset or Set Unset: Unlock not confirmed Set: Unlock confirmed When Unset is displayed, the steering is not unlocked (the engine cannot be started). Engine Start Indicator Key indicator OFF or ON Customization status displayed - Open in IG2 History of IG2 input of the steering lock ECU (steering lock actuator assembly) OK or NG(Past) OK: History of open in IG2 exists NG(Past): No history of open in IG2 exists When OK is displayed, the steering lock ECU (steering lock actuator assembly) has an IG2 input circuit malfunction. HINT: To check if the Data List display changes, get into the vehicle while carrying an electrical key transmitter sub-assembly and perform the following operations with the engine switch off and the shift lever in P. *1: Press the engine switch with the brake pedal released and check that the engine switch turns on (ACC). *2: Press the engine switch with the brake pedal released and check that the engine switch turns on (IG). *3: Press the engine switch and check that the engine switch turns off. *4: Release the brake pedal, open the driver side door and check that the steering locks. Body Electrical > Starting Control > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Starter SW Starter operation request OFF or ON OFF: Starter operation not requested ON: Starter operation requested When malfunctioning, the engine will not crank. Shift Position P or N Park/Neutral position switch status OFF or ON OFF: Shift lever not in P ON: Shift lever in P When malfunctioning, the engine will not crank. Starter Relay Starter relay voltage monitor OFF or ON OFF: ST relay off ON: ST relay on OFF is displayed when the engine cannot crank. Starting Control SW Starter request signal monitor OFF or ON OFF: Starting control switch off ON: Starting control switch on When malfunctioning, the engine cannot crank. Ignition IG2 status OFF or ON OFF: IG2 relay off ON: IG2 relay on - Engine Speed Engine speed 0 to 16383 rpm Fluctuates in accordance with engine speed - Number of DTCs Number of DTCs 0 to 255 - - HINT: *: With the engine switch on (IG), the shift lever in P and the brake pedal depressed, press the engine switch and check that the engine starts. Body Electrical > Combination Meter > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Vehicle Speed Meter Vehicle speed Min.: 0, Max.: 255 Almost same as actual vehicle speed (Speedometer tester) - Powertrain > Engine > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note ST1 Brake pedal signal OFF or ON OFF: Brake pedal released ON: Brake pedal depressed
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 engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / (desired system) / Active Test. Perform Active Test according to the display on the Techstream. Body Electrical > Power Source Control > Active Test Tester Display Measurement Item Control Range Diagnostic Note P Supply for Steering Lock Certification ECU (smart key ECU assembly) OFF/ON HINT: OFF: Power is not supplied. ON: Power is supplied. When performing this Active Test, make sure the following condition is met: The engine switch is on (IG). Body Electrical > Smart Access > Active Test Tester Display Measurement Item Control Range Diagnostic Note Power/Engine SW Light Engine switch light OFF/ON When performing this Active Test, make sure the following conditions are met: The engine switch illumination is off (15 seconds or more have elapsed since it turned from on to off) and the engine switch is on (ACC) or on (IG), or the engine is running. Body Electrical > Starting Control > Active Test Tester Display Measurement Item Control Range Diagnostic Note Activate the Starter Relay ST relay OFF/ON The electrical key transmitter sub-assembly is in the cabin and the engine is stopped.

DIAGNOSTIC TROUBLE CODE CHART [04/2013 - ]

SMART ACCESS SYSTEM WITH PUSH-BUTTON START (FOR START FUNCTION)