Smart Access System (Keyless Start) (Diagnostics - Introduction): Diagnosis Lexus LX J200 рестайлинг

HOW TO PROCEED WITH TROUBLESHOOTING [01/2012 - ]

HINT

1. Use these procedures to troubleshoot the push-button start function.
2. *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP NEXT: Go to next step
2. INSPECT BATTERY VOLTAGE Standard voltage 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding. NEXT: Go to next step
3. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* Using the Techstream, check if the CAN communication system is functioning normally. Refer to «DIAGNOSIS SYSTEM [01/2012 - ]». RESULT Result Proceed to DTC is not output A DTC is output B B --> GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART [01/2012 - ]» A: Go to next step
4. CHECK FOR DTC* Check for DTCs and note any output DTCs. Refer to «DTC CHECK / CLEAR [01/2012 - ]». Clear the DTCs. Check whether the same DTC(s) relevant to the SFI system or smart access system with push-button start recurs by reproducing the symptoms indicated by the noted DTC(s) in the first step above. RESULT Result Proceed to DTC output does not reoccur A SFI system DTC output reoccurs B Smart access system with push-button start DTC output reoccurs C B --> GO TO SFI SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to «DIAGNOSTIC TROUBLE CODE CHART [01/2012 - ]» C --> GO TO STEP 7 A: Go to next step
5. PROBLEM SYMPTOMS TABLE 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 7 A: Go to next step
6. OVERALL ANALYSIS AND TROUBLESHOOTING* Terminals of ECU. Refer to «TERMINALS OF ECU [01/2012 - ]» Data List / Active Test. Refer to «DATA LIST / ACTIVE TEST [01/2012 - ]» NEXT: Go to next step
7. ADJUST, REPAIR OR REPLACE NEXT: Go to next step
8. CONFIRMATION TEST NEXT --> END

PROBLEM SYMPTOMS TABLE [01/2012 - ]

HINT

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.

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

Scheme 74

Scheme 75

Scheme 76

Scheme 77

Scheme 78

Scheme 79

Scheme 80

Scheme 81

1. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH) Disconnect the E1, E2 and 2D main body ECU connectors. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E1-6 (AM1) - Body ground W - Body ground +B power supply Always 11 to 14 V E2-1 (AM2) - Body ground W - Body ground +B power supply Always 11 to 14 V E1-17 (SSW1) - Body ground B - Body ground Engine switch 1 input Engine switch pushed Below 1 ohms E1-17 (SSW1) - Body ground B - Body ground Engine switch 1 input Engine switch not pushed 10 kohms or higher E1-16 (SSW2) - Body ground B - Body ground Engine switch 2 input Engine switch pushed Below 1 ohms E1-16 (SSW2) - Body ground B - Body ground Engine switch 2 input Engine switch not pushed 10 kohms or higher 2D-62 (GND2) - Body ground W-B - Body ground Ground Always Below 1 ohms 2D-20 (LIN1) - Body ground GR - Body ground LIN line Always 10 kohms or higher If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the E1, E2 and 2D main body ECU connectors. Measure the voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E1-22 (ACCD) - 2D-62 (GND2) P - W-B ACC relay drive signal Engine switch on (ACC) 11 to 14 V E1-22 (ACCD) - 2D-62 (GND2) P - W-B ACC relay drive signal Engine switch off Below 1 V E1-3 (IG1D) - 2D-62 (GND2) G - W-B IG1 No. 3 relay drive signal Engine switch on (IG) 11 to 14 V E1-3 (IG1D) - 2D-62 (GND2) G - W-B IG1 No. 3 relay drive signal Engine switch on (ACC) Below 1 V E2-11 (IG2D) - 2D-62 (GND2) B - W-B Integration relay (IG2 relay) drive signal Engine switch on (IG) 11 to 14 V E2-11 (IG2D) - 2D-62 (GND2) B - W-B Integration relay (IG2 relay) drive signal Engine switch on (ACC) Below 1 V E1-19 (SLR+) - 2D-62 (GND2) G - W-B Steering lock power supply Steering lock motor operating Below 1 V E1-19 (SLR+) - 2D-62 (GND2) G - W-B Steering lock power supply Steering lock motor not operating 11 to 14 V E1-8 (STR) - 2D-62 (GND2) L - W-B Park/neutral position switch signal Engine switch on (IG), shift lever not in P or N --> P or N Below 2 V --> Pulse generation*1 E1-18 (SLP) - 2D-62 (GND2) SB - W-B Steering lock actuator position signal Steering lock locked 11 to 14 V E1-18 (SLP) - 2D-62 (GND2) SB - W-B Steering lock actuator position signal Steering lock released Below 1 V E3-9 (SPD) - 2D-62 (GND2) V - W-B Speed signal from combination meter Engine switch on (IG), driving wheel rotating slowly Pulse generation (see waveform 1) E3-8 (TACH) - 2D-62 (GND2) W - W-B Tachometer signal Engine running Pulse generation (see waveform 2) E4-2 (P) - 2D-62 (GND2) L - W-B Shift lock signal Shift lever in P Pulse generation (see waveform 3) E4-2 (P) - 2D-62 (GND2) L - W-B Shift lock signal Shift lever not in P Below 1 V E4-4 (STSW) - 2D-62 (GND2) R - W-B Starter activation request signal Brake pedal depressed with shift lever in P, engine switch pushed once 11 to 14 V E1-15 (INDS) - 2D-62 (GND2) W - W-B Vehicle condition signal Brake pedal released with shift lever in P or N, engine switch off, on (ACC) or on (IG) 9 to 14 V E1-14 (INDW) - 2D-62 (GND2) W - W-B Vehicle condition signal Brake pedal released with shift lever in P or N, engine switch off, on (ACC) or on (IG) 9 to 14 V E1-25 (SWIL) - 2D-62 (GND2) R - W-B Illumination signal Light control switch tail or head 11 to 14 V 2B-22 (STP) - 2D-62 (GND2) R - W-B Stop light switch signal Brake pedal depressed 11 to 14 V 2B-22 (STP) - 2D-62 (GND2) R - W-B Stop light switch signal Brake pedal released Below 1 V HINT: *1: Remove the ST 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 REFERENCE Terminal No. (Symbol) Tool Setting Condition E3-9 (SPD) - 2D-62 (GND2) 5 V/DIV., 100 msec./DIV. Vehicle driven at approx. 20 km/h (12 mph) HINT: As the vehicle speed increases, the wavelength shortens. Waveform 2 REFERENCE Terminal No. (Symbol) Tool Setting Condition E3-8 (TACH) - 2D-62 (GND2) 10 V/DIV., 10 msec./DIV. Engine switch on (IG) or engine started Waveform 3 REFERENCE Terminal No. (Symbol) Tool Setting Condition E4-2 (P) - 2D-62 (GND2) 2 V/DIV., 20 msec./DIV. Shift lever in P
2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Disconnect the E29 certification ECU (smart key ECU assembly) connector. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E29-1 (+B) - Body ground B - Body ground +B power supply Always 11 to 14 V E29-10 (LIN) - Body ground GR - Body ground LIN line Always 10 kohms or higher E29-17 (E) - 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 E29 certification ECU (smart key ECU assembly) connector. Measure the voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E29-18 (IG) - Body ground B - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V E29-18 (IG) - Body ground B - Body ground Ignition power supply Engine switch off Below 1 V If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.
3. CHECK ECM Disconnect the A38 and C53 ECM connectors. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A38-1 (BATT) - C53-81 (E1) L - W-B Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V A38-3 (+B) - C53-81 (E1) B - W-B Power source of ECM Engine switch on (IG) 11 to 14 V A38-28 (IGSW) - C53-81 (E1) B - W-B Engine switch signal Always 11 to 14 V C53-81 (E1) - Body ground W-B - Body ground Ground Always Below 1 ohms C53-43 (E01) - Body ground W-B - Body ground Ground Always Below 1 ohms C53-42 (E02) - Body ground BR - Body ground Ground Always Below 1 ohms C53-46 (E03) - Body ground W-B - Body ground Ground Always Below 1 ohms C53-23 (E04) - Body ground W-B - Body ground Ground Always Below 1 ohms C53-21 (E05) - 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 according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A38-46 (STA) - C53-81 (E1) R-B - W-B ST relay operation signal Cranking 5.5 V or higher A38-14 (STSW) - C53-81 (E1) R - W-B Starter activation request signal Brake pedal depressed, engine switch on (IG) Output voltage at terminal AM1 or AM2 is -2 V or higher A38-41 (ACCR) - C53-81 (E1) L-Y - W-B ACC relay cut signal (output) Engine switch on (IG) --> Cranking 11 to 14 V --> Below 1 V A38-15 (TACH) - C53-81 (E1) W-G - W-B Engine speed signal (output) Idling Pulse generation (see waveform 1) C53-16 (STAR) - C53-81 (E1) L - W-B ST relay drive signal Cranking 11 to 14 V If the result is not as specified, the ECM may have a malfunction. Using an oscilloscope, check the signal waveform of the ECM. REFERENCE Terminal No. (Symbol) Tool Setting Condition A38-15 (TACH) - C53-81 (E1) 5 V/DIV., 10 ms./DIV. Engine idling HINT: As the engine speed increases, the wavelength shortens.
4. CHECK STEERING LOCK ECU Disconnect the E26 steering lock ECU connector. Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E26-7 (B) - Body ground R - Body ground +B power supply Always 11 to 14 V E26-6 (IG2) - Body ground B - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V E26-6 (IG2) - Body ground B - Body ground Ignition power supply Engine switch off Below 1 V E26-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms E26-2 (SGND) - Body ground BR - 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 E26 steering lock ECU connector. Measure the voltage according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition E26-4 (SLP1) - E26-1 (GND) SB - W-B Steering lock actuator position signal Steering locked 11 to 14 V E26-4 (SLP1) - E26-1 (GND) SB - W-B Steering lock actuator position signal Steering released Below 1 V If the result is not as specified, the ECU may have a malfunction.

DTC CHECK / CLEAR [01/2012 - ]

1. CHECK DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Trouble codes. Read the DTCs.
2. CLEAR DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Trouble codes. Clear the DTCs.

DATA LIST / ACTIVE TEST [01/2012 - ]

1. READ 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. According to the display on the Techstream, read the Data List. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note ACC SW Engine switch on (ACC)/ON or OFF ON: Engine switch on (ACC) OFF: Engine switch off - IG SW Engine switch on (IG)/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - Stop Light SW Stop light switch/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released - Start Switch1 Start switch 1/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - Start Switch2 Start switch 2/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - Steering Unlock Switch Steering lock condition/ON or OFF ON: Steering unlocked OFF: Steering locked - Neutral SW/ Clutch SW Park/neutral position switch/ON or OFF ON: Shift lever in P or N OFF: Shift lever not in P or N - Shift P Signal Shift P position signal/ON or OFF ON: Shift lever in P OFF: Shift lever not in P - Vehicle Speed Signal Vehicle speed signal/Stop or Run Stop: Vehicle stopped Run: Vehicle running - Engine Condition Engine condition/Stop or Run Stop: Engine stopped Run: Engine running - IG1 Relay Monitor(Outside) IG1 No. 3 relay outer relay monitor/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - IG2 Relay Monitor(Outside) Integration relay (IG2 relay) outer relay monitor/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - IG1 Relay Monitor(Inside) IG1 No. 3 relay inner relay monitor/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - IG2 Relay Monitor(Inside) Integration relay (IG2 relay) inner relay monitor/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - ACC Relay Monitor ACC relay monitor/ON or OFF ON: Engine switch on (ACC) OFF: Engine switch off - Latch Circuit Latch circuit/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off or on (ACC) - Starter Request Signal Starter request signal/ON or OFF ON: ST relay on OFF: ST relay off - Power Supply Condition Power supply condition/ALL OFF, ACC ON, IG1 ON, IG2 ON or ST ON ALL OFF: All relays off ACC ON: ACC relay on IG1 ON: Integration relay (IG1 relay) on IG2 ON: Integration relay (IG2 relay) on ST ON: STSW signal on - ACC Relay Cut Signal ACC relay cut signal/ON or OFF ON: Engine cranking OFF: Engine not cranking - Starter Relay Monitor ST relay monitor/ON or OFF ON: Engine cranking OFF: Engine not cranking - Communication Smart/Wireless Communication to certification ECU (smart key ECU assembly)/OK or STOP OK: Communication STOP: No communication - The Number of DTC Number of diagnostic trouble codes/Min: 0, Max: 255 - - SMART ACCESS Tester Display Measurement Item/Range Normal Condition Diagnostic Note Ignition Switch Engine switch/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - Unmatched Vehicle-ID Key ID/Yes or No Yes: Key ID matches No: Key ID differs - No Response No Communication condition between vehicle and electrical key transmitter (response) / Yes or No Yes: Key ID code not matched to vehicle No: Key ID code matched to vehicle - Unmatch Code or Form Code format/Yes or No Yes: Code format matches No: Code format differs - Key Low Battery Key battery conditions/Yes or No Yes: Key battery voltage low No: Key battery voltage normal - #Codes Number of diagnostic trouble codes/Min: 0, Max: 255 - - ID Code Difference(Resp) ID code/Yes or No Yes: ID code matches No: ID code differs - C Code Difference Challenge code/Yes or No Yes: Challenge code matches No: Challenge code differs - Engine Start Condition Engine start condition by certification ECU (smart key ECU assembly)/OK or NG OK: Engine start permitted NG: Engine start prohibited - S Code Check S code certification result/NG or OK OK: S code certification result normal NG: S code certification result abnormal - L Code Check L code certification result/NG or OK OK: L code certification result normal NG: L code certification result abnormal - Ignition Available Area Key area where engine start is possible/All or Front All: All areas Front: Front only
2. PERFORM 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. According to the display on the Techstream, perform the Active Test. MAIN BODY Tester Display Test Part Control Range Diagnostic Note Indicator for Lighting Indicator illumination ON/OFF - Indicator Condition Indicator light illumination pattern Green/Red/No Sig - P Supply for Steering Lock Steering lock ECU power supply ON/OFF - SMART ACCESS Tester Display Test Part Control Range Diagnostic Note Fr-Seat Inside Transmitter Indoor key antenna (for front) ON/OFF - Rr-Seat Inside Transmitter Indoor key antenna (for rear 1) ON/OFF - Inside Trunk/Backdoor Transmitter Indoor key antenna (for rear 2) ON/OFF - Outside Trunk/Backdoor Transmitter Electrical key antenna ON/OFF

DIAGNOSTIC TROUBLE CODE CHART [01/2012 - ]

HINT

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

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

See also:
• INSPECTION [01/2012 - ]