Engine Starting System (2GR-FE) (Except Hybrid): Other Toyota Highlander II

SYSTEM DIAGRAM

The starting system operates the starter motor according to the signals from the ignition switch and PNP switch.

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PRECAUTION

1. NOTICE FOR INITIALIZATION NOTE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. SYSTEM NAME REFERENCE System Name Information Power Back Door System «INITIALIZATION»(ref-290683-S20539755842008071700000)
2. EMERGENCY ENGINE START CONTROL If there is a malfunction in the stop light switch or STOP fuse, their signals may not be correctly transmitted to the main body ECU (Instrument panel junction block). This may result in the engine not starting even if the engine switch is pressed while the brake pedal is depressed and the shift lever is in the P or N position. To activate the starter: Turn the engine switch from off to on (ACC). Press and hold the engine switch for 15 seconds.
3. PRECAUTIONS FOR PUSH-BUTTON START FUNCTION: Before starting the engine, firmly depress the brake pedal until the indicator in the engine switch turns green. The power source mode (off, on (ACC), on (IG)) is always retained in memory by the vehicle. If the battery is disconnected, the power source mode that was present before disconnection will be restored after the battery is reconnected. Be sure to turn the engine switch off before disconnecting the cable from the negative battery terminal. Be careful if the power source mode of a vehicle with a discharged battery is not known. After the battery is reconnected, be sure to wait 10 seconds or more before attempting to start the engine. The engine may not start immediately after the battery is reconnected. If the electrical key is held near the engine switch to start the engine when the electrical key battery is depleted, the following warnings will sound: Driver's door open --> closed An exit warning will sound if the power source is in a mode other than off. Doors other than the driver door open --> closed A warning will sound to indicate that the electrical key has been taken out of the vehicle. These warnings will sound because it is not possible for the vehicle to determine if the key is present in the vehicle (due to the depleted key battery). These warnings do not indicate system malfunctions.

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Communication table

COMMUNICATION REFERENCE TABLE

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1. PUSH-BUTTON START FUNCTION DESCRIPTION The push-button start function uses a push-type engine switch, which the driver can operate by merely carrying the electrical key. This system consists primarily of the main body ECU (instrument panel junction block), engine switch, ID code box (immobilizer code ECU), steering lock ECU, electrical key, ACC relay, IG1 relay, IG2 relay and certification ECU (smart key ECU assembly). The main body ECU (instrument panel junction block) controls the function. This function operates in cooperation with the smart key system.
2. FUNCTION OF COMPONENT FUNCTION OF COMPONENTS Component Function Engine Switch Transponder Key Amplifier Transmits engine switch signal to main body ECU (instrument panel junction block). Informs driver of power source mode or system abnormality with illumination of indicator light. Receives ID code and transmits it to certification ECU (smart key ECU assembly) when key battery is low. Electrical Key Receives signals from oscillators and returns ID code to door control receiver. Indoor Oscillator Front and Rear Receives request signals from certification ECU (smart key ECU assembly) and forms detection area in vehicle interior. Steering Lock ECU Receives lock/unlock request signals from certification ECU (smart key ECU assembly) and main body ECU (instrument panel junction block). Stop Light Switch Outputs state of brake pedal to main body ECU (instrument panel junction block). Door Control Receiver Receives ID code from electrical key and transmits it to certification ECU (smart key ECU). Main body ECU (instrument panel junction block) Changes power source mode in 4 stages (off, on (ACC), on (IG), start) in accordance with shift position and state of stop light switch. Controls push-button start function in accordance with signals received from switches and each ECU. Certification ECU (smart key ECU assembly) Certifies ID code received from door control receiver and transmits certification results to ID code box (immobilizer code ECU) and steering lock ECU. ID Code Box Receives steering unlock or engine immobilizer unset signals from certification ECU (smart key ECU assembly), certifies them, and transmits each unset signal to steering lock ECU or ECM. ECM Receives engine start request signal from main body ECU (instrument panel junction block), turns ON starter relay, and starts engine. Receives signal from ID code box (immobilizer code ECU) and performs engine ignition and injection.
3. SYSTEM FUNCTION The electric controls of the push-button start function are described below: FUNCTION TABLE Control Outline Engine switch control When driver operates engine switch with electrical key in driver's possession, certification ECU (smart key ECU assembly) starts indoor oscillator, which transmits request signal to electrical key. Upon receiving this signal, the electrical key transmits ID code matching result signal to main body ECU (instrument panel junction block). Diagnosis When main body ECU (instrument panel junction block) detects malfunction, main body ECU (instrument panel junction block) diagnoses and memorizes failed section.
4. CONSTRUCTION AND OPERATION Engine Switch The engine switch consists of a momentary type switch, 2 color (amber, green) LEDs, and a transponder key amplifier. The amber LED is for illumination. The amber and green LEDs are for the indicator lights. The driver can check the present power source mode and whether the engine can start in accordance with the illumination state of the indicator light. When the main body ECU (instrument panel junction block) detects an abnormality in the push-button start function, it makes the amber indicator light flash. If the engine is stopped in this state, it may not be possible to restart it. Indicator Light Condition Engine switch indicator light condition: ENGINE SWITCH INDICATOR LIGHT CONDITION TABLE Power Source Mode/Condition Indicator Light Condition Brake pedal released Brake pedal depressed, shift lever in P or N off OFF ON (Green) (When key and vehicle IDs match) on (ACC, IG) ON (Amber) ON (Green) Engine running OFF OFF Steering lock not unlocked Flashes (Green) for 15 sec. Flashes (Green) for 15 sec. System malfunction Flashes (Amber) for 15 sec. Flashes (Amber) for 15 sec. Main body ECU (instrument panel junction block) The main body ECU (instrument panel junction block) consists of the IG1 and IG2 relay actuation circuits and CPU. HINT: Before removing the battery, make sure to turn the engine switch off. The main body ECU (instrument panel junction block) constantly stores the present power source mode in its memory. Therefore, if the main body ECU (instrument panel junction block) is interrupted by disconnecting the battery, the main body ECU (instrument panel junction block) restores the power source mode after the battery is reconnected. For this reason, if the battery is disconnected when the engine switch is not off, the power will be restored to the vehicle at the same time the power is restored to the main body ECU (instrument panel junction block) (by reconnecting the battery).
5. PUSH-BUTTON START FUNCTION OPERATION This system has different power source mode patterns depending on the brake pedal condition and shift lever position. POWER SOURCE MODE PATTERNS REFERENCE Brake Pedal Shift Lever Power Source Mode Pattern Depressed P or N position When the engine switch is pushed once. off --> engine start on (ACC) --> engine start on (IG) --> engine start Not depressed P position Each time the engine switch is pushed. off --> on (ACC) --> on (IG) --> off Except P position Each time the engine switch is pushed. off --> on (ACC) --> on (IG) --> on (ACC) - P position When the engine switch is pushed with power source mode on (IG) (engine running). on (IG) --> off - Except P position When the engine switch is pushed with power source mode on (IG) (engine running). on (IG) --> on (ACC) When the battery of the key is low, the push-button start function can be operated by holding the key against the engine switch. After approximately 1 hour has passed with the engine switch on (ACC) and the shift position in P, the main body ECU (instrument panel junction block) will automatically cut the power supply (the power source mode changes to off). The graphic shown below shows the transition of power source modes. Transition of power source mode: HINT: While the vehicle is being driven normally, operation of the engine switch is disabled. However, if the engine must be stopped in an emergency while the vehicle is being driven, pressing the engine switch for 3 seconds or more stops the engine. Power source mode changes from start to on (ACC).
6. WHEN KEY BATTERY IS LOW To operate the push-button start function when the key battery is low, hold the key close to the engine switch with the brake pedal depressed. The main body ECU (instrument panel junction block) transmits a key verification request signal to the certification ECU (smart key ECU assembly). The certification ECU (smart key ECU assembly) does not receive an ID code response from the door control receiver, so it actuates the transponder key amplifier built into the engine switch. The transponder key amplifier outputs an engine immobilizer radio wave to the key. The key receives the radio wave, and returns a radio wave response to the transponder key amplifier. The transponder key amplifier combines the key ID codes with the radio wave response, and transmits it to the certification ECU (smart key ECU assembly). The certification ECU (smart key ECU assembly) judges and verifies the ID code, and transmits a key verification OK signal to the main body ECU (instrument panel junction block). The buzzer in the combination meter sounds at the same time. After the buzzer sounds, if the engine switch is pressed within 5 seconds with the brake pedal not depressed, the power source mode changes to on (ACC) or on (IG), the same as in the normal condition.
7. DIAGNOSIS The main body ECU (instrument panel junction block) can detect malfunctions in the push-button start function when the power source mode is on (IG). When the ECU detects a malfunction, the amber or green indicator light of the engine switch flashes to warn the driver. At the same time, the ECU stores a 5-digit DTC (Diagnostic Trouble Code) in the memory. The indicator light warning continues for 15 seconds even after the power source mode is changed to off. The DTC can be read by connecting Techstream to the DLC3. The push-button start function cannot be operated if a malfunction occurs.

CUSTOMIZE PARAMETERS

1. CUSTOMIZING FUNCTION WITH TECHSTREAM HINT: The items in the table below can be customized. NOTE: When the customer requests a change in a function, first make sure that the function can be customized. Be sure to make a note of the current setting before customizing. When troubleshooting a function, first make sure that the function is set to the default setting. HINT: The following functions' default settings are ON. Part of these functions can be customized. Smart Key/Access: CUSTOMIZE PARAMETERS - SMART KEY/ACCESS Display (Item) Default Contents Setting Ignition Available Area (Entry ignition available area) ALL Function to choose the available area for electrical key to start E/G and cancel the steering lock. FRONT/ALL

PUSH-BUTTON START FUNCTION

PROBLEM SYMPTOMS TABLE

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1. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) Disconnect the D7, D8, D9, 1E, 1F and 1M connectors. Measure the voltage and resistance of the wire harness side connector. VOLTAGE AND RESISTANCE SPECIFICATION TABLE Tester Connection Wiring Color Terminal Description Condition Specified Condition D8-6 (AM1) - Body ground GR - Body ground +B power supply Always 11 to 14 V D7-1 (AM2) - Body ground G - Body ground +B power supply Always 11 to 14 V D8-16 (SSW2) - Body ground BR - Body ground Engine switch signal Engine switch pushed Below 1 ohms D8-16 (SSW2) - Body ground BR - Body ground Engine switch signal Engine switch not pushed 10 kohms or higher D8-17 (SSW1) - Body ground P - Body ground Engine switch signal Engine switch pushed Below 1 ohms D8-17 (SSW1) - Body ground P - Body ground Engine switch signal Engine switch not pushed 10 kohms or higher 1M-9 (GND2) - Body ground W-B - Body ground Ground Always Below 1 ohms D9-5 (CANH) - Body ground GR - Body ground CAN Line Always 10 kohms or higher D9-6 (CANL) - Body ground W - Body ground CAN Line Always 10 kohms or higher D9-15 (CANN) - Body ground (1) W - Body ground CAN Line Always 10 kohms or higher D9-16 (CANP) - Body ground (1) Y - Body ground CAN Line Always 10 kohms or higher 1F-16 (GND1) - Body ground W-B - Body ground Ground Always Below 1 ohms 1E-7 (LIN1) - Body ground R - Body ground LIN line Always 10 kohms or higher HINT: (1) w/ Power back door If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the connectors. Measure the voltage of the connector. VOLTAGE SPECIFICATION TABLE Tester Connection Wiring Color Terminal Description Condition Specified Condition D7-3 (ACCR) - 1M-9 (GND2) O - W-B Starter assist signal (ACC cut signal) Brake pedal depressed, shift lever P position, engine switch is pushed once --> on (IG) 0.1 to 0.8 V *1 --> Output voltage at terminal AM1 or AM2 is -2 V or more. D7-11 (IG2D) - 1-9 (GND2) Y - W-B IG2 signal Engine switch on (IG) Output voltage at terminal AM1 or AM2 is -2 V or more. D7-11 (IG2D) - 1M-9 (GND2) Y - W-B IG2 signal Engine switch on (ACC) Below 1 V D8-3 (IG1D) - 1M-9 (GND2) SB - W-B IG1 signal Engine switch on (IG) Output voltage at terminal AM1 or AM2 is -2 V or more. D8-3 (IG1D) - 1M-9 (GND2) SB - W-B IG1 signal Engine switch on (ACC) Below 1 V D8-8 (STR) - 1M-9 (GND2) B - W-B Park/Neutral position switch signal. Engine switch on (IG), shift lever except P or N position --> P or N position Below 2 V --> Pulse generation *3 D8-18 (SLP) - 1M-9 (GND2) O - W-B Steering lock actuator position signal Steering lock is locked Pulse generation (See 3 waveform 3) D8-18 (SLP) - 1M-9 (GND2) O - W-B Steering lock actuator position signal Steering lock is released Pulse generation (See 3 waveform 3) D8-19 (SLR+) - 1M-9 (GND2) Y - W-B Steering lock motor signal Steering lock motor operating Below 1 V D8-19 (SLR+) - 1M-9 (GND2) Y - W-B Steering lock motor signal Steering lock motor does not operate Output voltage at terminal AM1 or AM2 is -2 V or more. D8-22 (ACCD) - 1M-9 (GND2) GR - W-B ACC signal Engine switch on (ACC) Output voltage at terminal AM1 or AM2 is -2 V or more. D8-22 (ACCD) - 1M-9 (GND2) GR - W-B ACC signal Engine switch off Below 1 V D8-25 (SWIL) - 1M-9 (GND2) R - W-B Illumination signal Light control switch TAIL or HEAD Output voltage at terminal AM1 or AM2 is -2 V or more. D9-8 (TACH) - 1M-9 (GND2) BR - W-B Tachometer signal Engine running Pulse generation (See 2 waveform 2) D9-9 (SPD) - 1M-9 (GND2) R - W-B Vehicle speed signal Engine switch on (IG), rotate rear wheel slowly Pulse generation (See 1 waveform 1) D10-4 (STSW) - 1M-9 (GND2) P - W-B Starter activation request signal Brake pedal depressed, engine switch held on (ST) Output voltage at terminal AM1 or AM2 is -2 V or more. D10-6 (STR2) - 1M-9 (GND2) LG - W-B Starter signal (Sub) Brake pedal depressed, shift lever P or N position, engine switch on (ST) Output voltage at terminal AM1 or AM2 is -3.5 V or more. *2 1F-2 (ACC) - Body ground SB - Body ground ACC power supply Always 11 to 14 V 1A-1 (IG) - Body ground B - Body ground IG power supply Always 11 to 14 V 1M-7 (STP) - 1M-9 (GND2) GR - W-B Stop light signal Brake pedal depressed Output voltage at terminal AM1 or AM2 is -2 V or more. 1M-7 (STP) - 1M-9 (GND2) GR - W-B Stop light signal Brake pedal released Below 1 V HINT: *1 : Voltage is output only when the engine is cranking. *2 : Voltage is output for 0.3 seconds when the engine is cranking to start. Disconnect the B3 connector from the ECM and starter cut relay before measuring the voltage. *3 : Remove the starter cut relay before measuring the voltage. If the result is not as specified, the ECU may have a malfunction. Using an oscilloscope, check the signal waveform of the ECU. Waveform 1 Waveform 1 (Reference): WAVEFORM 1 REFERENCE TABLE Terminal No. D9-9 (SPD) - 1M-9 (GND2) Tool Setting 5 V/DIV., 10 ms./DIV. Vehicle Condition Driving at approx. 20 km/h (12 mph) HINT: As the vehicle speed increases, the wavelength shortens. Waveform 2 Waveform 2 (Reference): WAVEFORM 2 REFERENCE Terminal No. D9-8 (TACH) - 1M-9 (GND2) Tool Setting 5 V/DIV., 10 ms./DIV. Vehicle Condition Engine idling HINT: As the engine revolution speed increases, the wavelength shortens. Waveform 3 Waveform 3 (Reference): WAVEFORM 3 REFERENCE TABLE Terminal No. D8-18 (SLP) - 1M-9 (GND2) Tool Setting 2 V/DIV., 100 ms./DIV. Vehicle Condition Steering look/unlock
2. CHECK CERTIFICATION ECU Disconnect the D40 ECU connector. Measure the voltage and resistance of the wire harness side connector. VOLTAGE AND RESISTANCE SPECIFICATION TABLE Tester Connection Wiring Color Terminal Description Condition Specified Condition D40-1 (+B) - Body ground B - Body ground +B power supply Always 11 to 14 V D40-10 (LIN) - Body ground L - Body ground LIN line Always 10 kohms or higher D40-17 (E) - Body ground B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the ECU connector. Measure the voltage of the connector. VOLTAGE SPECIFICATION TABLE Tester Connection Wiring Color Terminal Description Condition Specified Condition D40-18 (IG) - Body ground G - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V D40-18 (IG) - Body ground G - Body ground Ignition power supply Engine switch off Below 1 V If the result is not as specified, the ECU may have a malfunction.
3. CHECK ECM Disconnect the B1, B2, B3 and D35 ECM connectors. Measure the voltage and resistance of the wire harness side connectors. VOLTAGE AND RESISTANCE SPECIFICATION TABLE Tester Connection Wiring Color Terminal Description Condition Specified Condition D35-2 (+B2) - Body ground GR - Body ground Power source of ECM Engine switch on (IG) 11 to 14 V D35-1 (+B) - Body ground SB - Body ground Power source of ECM Engine switch on (IG) 11 to 14 V D35-9 (IGSW) - Body ground W - Body ground Engine switch signal Engine switch on (IG) 11 to 14 V B2-3 (ME01) - Body ground W-B - Body ground Ground Always Below 1 ohms B1-6 (E02) - Body ground W-B - Body ground Ground Always Below 1 ohms B1-7 (E01) - Body ground W-B - Body ground Ground Always Below 1 ohms B2-7 (E04) - Body ground W-B - Body ground Ground Always Below 1 ohms B2-6 (E05) - Body ground W-B - Body ground Ground Always Below 1 ohms B3-1 (E1) - Body ground W-B - Body ground Ground Always Below 1 ohms B2-4 (E03) - Body ground W-B - Body ground Ground Always Below 1 ohms If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the ECM connectors. Measure the voltage of the connectors. VOLTAGE SPECIFICATION TABLE Tester Connection Wiring Color Terminal Description Condition Specified Condition D35-17 (ACCR) - B3-1 (E1) O - W-B ACC relay cut signal (output) Brake pedal depressed, shift lever P or N position, engine switch is pushed once --> on (IG) 0.1 to 0.8 V (1) --> Output voltage at terminal AM1 or AM2 is -2 V or more. B3-12 (STSW) - B3-1 (E1) P - W-B Starter activation request signal Brake pedal depressed, engine switch held (IG) Output voltage at terminal AM1 or AM2 is -2 V or more. D36-1 (TACH) - B3-1 (E1) B - W-B Engine revolution signal (output) Idling Pulse generation (see «WAVEFORM 1 REFERENCE»(ref-290691-S08027782662008071700000) waveform 1) D35-15 (STP) - B3-1 (E1) R - W-B Stop light switch signal (input) Brake pedal depressed 7.5 to 14 V D35-15 (STP) - B3-1 (E1) R - W-B Stop light switch signal (input) Brake pedal released Below 1.5 V B3-11 (STA) - B3-1 (E1) B - W-B Starter relay operation signal Cranking 11 to 14 V B2-8 (STAR) - B3-1 (E1) GR - W-B Starter signal (Main) Brake pedal depressed, shift lever P or N position, engine switch on (ST) 11 to 14 V HINT: (1) Voltage is output only when the engine is cranking. If the result is not as specified, the ECM may have a malfunction. Using an oscilloscope, check the signal waveform of the ECM. Waveform 1 (Reference): WAVEFORM 1 REFERENCE Terminal No. D36-1 (TACH) - B3-1 (E1) Tool Setting 5 V/DIV., 10 ms./DIV. Vehicle Condition Engine idling HINT: As the vehicle speed increases, the wavelength shortens.
4. CHECK STEERING LOCK ECU Disconnect the D11 ECU connector. Measure the voltage and resistance of the wire harness side connector. VOLTAGE AND RESISTANCE SPECIFICATION TABLE Tester Connection Wiring Color Terminal Description Condition Specified Condition D11-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms D11-2 (SGND) - Body ground W - Body ground Ground Always Below 1 ohms D11-6 (IG2) - Body ground V - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V D11-6 (IG2) - Body ground V - Body ground Ignition power supply Engine switch off Below 1 V D11-7 (B) - Body ground G - Body ground +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. Reconnect the D11 ECU connector. Measure the voltage of the connector. VOLTAGE SPECIFICATION TABLE Tester Connection Wiring Color Terminal Description Condition Specified Condition D11-4 (SLP1) - D11-1 (GND) O - W-B Steering lock actuator position signal Steering is locked 11 to 14 V D11-4 (SLP1) - D11-1 (GND) O - W-B Steering lock actuator position signal Steering is released Below 1 V If the result is not as specified, the ECU may have a malfunction.