Starting: Diagnosis Lexus LS IV

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

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

1. VEHICLE BROUGHT TO WORKSHOP
2. INSPECT BATTERY VOLTAGE Standard voltage: 11 to 14 V If the voltage is below 11 V, recharge or replace the battery before proceeding.
3. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* Using the Techstream, check if the CAN communication system is functioning normally (see «DIAGNOSIS SYSTEM»(ref-349742-S42827894432009120800000) ). Result RESULT REFERENCE Result Proceed to DTC is not output A DTC is output B B: GO TO «DIAGNOSTIC TROUBLE CODE CHART»(ref-349725-S14053349582009120800000) A: Go to next step.
4. CHECK FOR DTC* Check for DTCs and note any stored DTCs (see «DTC CHECK/CLEAR»(ref-349725-S42845355162009120800000) ). Delete 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 REFERENCE 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»(ref-349724-S13955834772009120800000) C: GO TO STEP 7 A: Go to next step.
5. PROBLEM SYMPTOMS TABLE Result RESULT REFERENCE 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 (see «TERMINALS OF ECU»(ref-349725-S16344870262009120800000) ) DATA LIST/ACTIVE TEST (see «DATA LIST/ACTIVE TEST»(ref-349725-S21093229552009120800000) )
7. ADJUST, REPAIR OR REPLACE
8. CONFIRMATION TEST NEXT: END

PROBLEM SYMPTOMS TABLE

HINT

Use the table below to help determine the cause of the problem symptom. 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

SYMPTOM CHART

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Scheme 117

1. CHECK MAIN BODY ECU Disconnect the L12, L13 and DA main body ECU connectors. Measure the voltage and resistance according to the value(s) in the table below. WIRING COLOR REFERENCE Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L13-6 (AM1) - Body ground W - Body ground +B power supply Always 11 to 14 V L12-1 (AM2) - Body ground W - Body ground +B power supply Always 11 to 14 V L13-17 (SSW1) - Body ground W - Body ground Engine switch 1 input Engine switch pushed Below 1 ohms L13-17 (SSW1) - Body ground W - Body ground Engine switch 1 input Engine switch not pushed 10 kohms or higher L13-16 (SSW2) - Body ground L - Body ground Engine switch 2 input Engine switch pushed Below 1 ohms L13-16 (SSW2) - Body ground L - Body ground Engine switch 2 input Engine switch not pushed 10 kohms or higher DA-40 (GND1) - Body ground W-B - Body ground Ground Always Below 1 ohms DA-23 or DA-52 (LIN1) - Body ground BE - 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 L12, L13 and DA main body ECU connectors. Measure the voltages according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L13-22 (ACCD) - DA-40 (GND1) G - W-B D-ACC relay drive signal Engine switch on (ACC) 11 to 14 V L13-22 (ACCD) - DA-40 (GND1) G - W-B D-ACC relay drive signal Engine switch off Below 1 V L12-11 (IG2D) - DA-40 (GND1) P - W-B IG2 relay drive signal Engine switch on (IG) 11 to 14 V L12-11 (IG2D) - DA-40 (GND1) P - W-B IG2 relay drive signal Engine switch on (ACC) Below 1 V L13-19 (SLR+) - DA-40 (GND1) SB - W-B Steering lock power supply Steering lock motor operating Below 1 V L13-19 (SLR+) - DA-40 (GND1) SB - W-B Steering lock power supply Steering lock motor not operating 11 to 14 V L13-18 (SLP) - DA-40 (GND1) LG - W-B Steering lock actuator position signal Steering lock locked 11 to 14 V L13-18 (SLP) - DA-40 (GND1) LG - W-B Steering lock actuator position signal Steering lock released Below 1 V L11-9 (SPD) - DA-40 (GND1) V - W-B Speed signal from combination meter Engine switch on (IG), rotate driving wheel slowly Pulse generation (see e waveform 1) L11-8 (TACH) - DA-40 (GND1) B - W-B Tachometer signal Engine running Pulse generation (see f waveform 2) A68-4 (STSW) - DA-40 (GND1) B - W-B Starter activation request signal Brake pedal depressed with shift lever in P or N, engine switch pushed once 11 to 14 V* L13-8 (STR) - DA-40 (GND1) L - W-B Park/neutral position switch Shift lever in P or N Below 1 V A68-6 (STR2) - DA-40 (GND1) BR - W-R Starter signal Brake pedal depressed with shift lever in P or N, engine switch pushed once 11 to 14 V* L13-15 (INDS) - DA-40 (GND1) B - W-B Vehicle condition signal Brake pedal depressed with shift lever in P or N, engine switch off, on (ACC, IG) 9 to 14 V L13-14 (INDW) - DA-40 (GND1) P - W-B Vehicle condition signal Brake pedal released with shift lever in P or N, engine switch off, on (ACC, IG) 9 to 14 V L13-25 (SWIL) - DA-40 (GND1) R - W-B Illumination signal Light control switch TAIL or HEAD 11 to 14 V DH-15 (STP) - DA-40 (GND1) L - W-B Stop light switch signal Brake pedal depressed 11 to 14 V HINT: *: Voltage is output for 0.3 seconds before the engine is started. If the result is not as specified, the ECU may have a malfunction. Using an oscilloscope, check waveform 1. Waveform 1 (Reference) WAVEFORM REFERENCE Item Content Terminal No. (Symbols) L11-9 (SPD) - DA-40 (GND1) Tool setting 5V/DIV., 10 msec./DIV. Condition Driving at approx. 20 km/h (12 mph) HINT: As the vehicle speed increases, the wavelength shortens. Using an oscilloscope, check waveform 2. Waveform 2 (Reference) WAVEFORM REFERENCE Item Content Terminal No. (Symbols) L11-8 (TACH) - DA-40 (GND1) Tool setting 5V/DIV., 10 msec./DIV. Condition Engine idling HINT: As the vehicle speed increases, the wavelength shortens.
2. CHECK CERTIFICATION ECU Disconnect the L15 certification ECU connector. Measure the voltage and resistance according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L15-1 (+B1) - Body ground L - Body ground +B power supply Always 11 to 14 V L15-18 (IG) - Body ground L - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V L15-18 (IG) - Body ground L - Body ground Ignition power supply Engine switch off Below 1 V L15-10 (LIN) - Body ground BE - Body ground LIN line Always 10 kohms or higher L15-17 (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.
3. CHECK ECM Disconnect the A13, A14, E2 and E3 ECM connectors. Measure the voltage and resistance according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition A14-7 (BATT) - E3-1 (E1) B - W-B Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V A13-2 (+B) - E3-1 (E1) B-W - W-B Power source of ECM Engine switch on (IG) 11 to 14 V A14-8 (IGSW) - E3-1 (E1) R - W-B Engine switch signal Always 11 to 14 V E3-1 (E1) - Body ground W-B - Body ground Ground Always Below 1 ohms E2-1 (E02) - Body ground W-B - Body ground Ground Always Below 1 ohms E3-4 (E04) - Body ground W-B - Body ground Ground Always Below 1 ohms E2-2 (E01) - Body ground W-B - Body ground Ground Always Below 1 ohms A13-5 (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 A13, A14, E2 and E3 ECM connectors. Measure the voltage according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition A13-20 (STA) - E3-1 (E1) Y - W-B Starter relay operation signal Cranking 5.5 V or more A13-19 (ACCR) - E3-1 (E1) G - W-B D-ACC relay cut signal (output) Engine switch on (IG) --> Cranking 11 to 14 V --> Below 1 V A14-15 (TACH) - E3-1 (E1) R - W-B Engine revolution signal (output) Idling Pulse generation (see e waveform 1) A14-2 (STAR) - E3-1 (E1) BR - W-B Starter 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 waveform 1. Waveform 1 (Reference) ITEM CONTENT CHART Item Content Terminal No. (Symbols) A14-15 (TACH) - E3-1 (E1) Tool setting 5V/DIV., 10 msec./DIV. Condition Engine idling HINT: As the vehicle speed increases, the wavelength shortens.
4. CHECK STEERING LOCK ECU Disconnect the L33 steering lock ECU connector. Measure the voltage and resistance according to the value(s) in the table below. TERMINAL DESCRIPTION Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition L33-7 (B) - Body ground P - Body ground +B power supply Always 11 to 14 V L33-6 (IG2) - Body ground L - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V L33-6 (IG2) - Body ground L - Body ground Ignition power supply Engine switch off Below 1 V L33-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 ohms L33-2 (SGND) - Body ground BR - Body ground Ground Always Below 1 ohms If the result is not as specified, the ECU may have a malfunction.

DTC CHECK/CLEAR

1. CHECK DTC Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body/(desired system)/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/(desired system)/Trouble codes. Erase the DTCs.

DATA LIST/ACTIVE TEST

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 for 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 ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note ACC SW Engine switch on (ACC)/ON or OFF ON: Engine switch is on (ACC) OFF: Engine switch is off - IG SW Engine switch on (IG)/ON or OFF ON: Engine switch is on (IG) OFF: Engine switch is off - Stop Light SW Stop light switch/ON or OFF ON: Brake pedal is depressed OFF: Brake pedal is released - Start Switch 1 Start switch 1/ON or OFF ON: Engine switch is on (IG) OFF: Engine switch is off - Start Switch2 Start switch 2/ON or OFF ON: Engine switch is on (IG) OFF: Engine switch is off - Steering Unlock Switch Steering lock condition/ON or OFF ON: Steering is unlocked OFF: Steering is locked - Neutral SW/ Clutch SW Park/neutral position switch/ON or OFF ON: Shift lever in P or N OFF: Shift lever in R or D - Vehicle Speed Signal Vehicle speed signal/Stop or Run Stop: Vehicle is stopped Run: Vehicle is running - Engine Condition Engine condition/Stop or Run Stop: Engine is stopped Run: Engine is running - IG1 Relay Monitor(Outside) D-IG1 relay outer relay monitor/ON or OFF ON: Engine switch is on (IG) OFF: Engine switch is off - IG2 Relay Monitor(Outside) IG2 outer relay monitor/ON or OFF ON: Engine switch is on (IG) OFF: Engine switch is off - IG1 Relay Monitor(Inside) D-IG1 relay inner relay monitor/ON or OFF ON: Engine switch is on (IG) OFF: Engine switch is off - IG2 Relay Monitor(Inside) IG2 inner relay monitor/ON or OFF ON: Engine switch is on (IG) OFF: Engine switch is off - ACC Relay Monitor D-ACC relay monitor/ON or OFF ON: Engine switch is on (ACC) OFF: Engine switch is off - Latch Circuit Ratch circuit/ON or OFF ON: Engine switch is on (IG) OFF: Engine switch is off, on (ACC) or engine is running - Starter Request Signal Starter request signal/ON or OFF ON: ST relay is ON OFF: ST relay is OFF - Power Supply Condition Power supply condition/ALL, ACC ON, IG1 ON, IG2 ON, ST ON ALL: All relays are ON ACC ON: D-ACC relay is ON IG1 ON: D-IG1 relay is ON IG2 ON: IG2 relay is ON ST ON: ST relay is ON - The Number of DTC Number of diagnosis codes/Min: 0, Max: 255 - - Smart Access ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note Ignition Switch Engine switch/ON or OFF ON: Engine switch is on (IG) OFF: Engine switch is off - Unmatched Vehicle-ID Key number/YES or NO YES: Key number matches NO: Key number differs - No Response Response/YES or NO YES: Response NO: No response - 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: Battery is depleted NO: Battery is not depleted - 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 - S Code Check S code certification result/NG or OK NG: S code certification result is abnormal OK: S code certification result is normal - L Code Check L code certification result/NG or OK NG: L code certification result is abnormal OK: L code certification result is normal - Ignition Available Area Key area where engine start is possible/ALL or FRONT ALL: All areas FRONT: Front only - Body No. 4 ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note Stop Light Tr. Stop light switch/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released
2. PERFORM ACTIVE TEST HINT: Using the Techstream to perform the Active Test 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. Turn the engine switch off. 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 CONTROL RANGE REFERENCE 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 CONTROL RANGE REFERENCE 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 rear1) ON/OFF - Inside Trunk/Backdoor Transmitter Indoor key antenna (for rear2) ON/OFF

DIAGNOSTIC TROUBLE CODE CHART

HINT

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

Smart access system with push-button start

DIAGNOSTIC TROUBLE CODE CHART

INSPECTION PROCEDURE

HINT

Before commencing troubleshooting, check if the main body ECU is wet. If it is, replace the main body ECU.

1. CHECK WHETHER DTC OUTPUT RECURS Clear the DTCs (see «DTC CHECK/CLEAR»(ref-349725-S42845355162009120800000) ). Check whether DTC B2277 recurs 30 seconds or more after the engine switch is turned on (IG). OK: No DTC is output. NG: REPLACE MAIN BODY ECU OK: END (SYSTEM IS OK)

HINT

If the vehicle is in key cancel mode, change to normal mode (see CUSTOMIZE PARAMETERS ).

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1. CHECK WHETHER DTC OUTPUT RECURS Clear the DTCs (see «DTC CHECK/CLEAR»(ref-349725-S42845355162009120800000) ). HINT: After all DTCs are cleared, check if the trouble occurs again 5 seconds after the engine switch is turned on (IG). Check for DTCs again. OK: No DTC is output. NG: GO TO «DTC CHART»(ref-349725-S14053349582009120800000) OK: Go to next step.
2. CHECK ENGINE SWITCH (SWITCH CONDITION) Ensure the key is inside the cabin. Check that the engine switch indicator illuminates in green when the shift lever is in P or N and the brake pedal is depressed. OK: Engine switch indicator illuminates in green. NG: GO TO ROOM OSCILLATOR DOES NOT RECOGNIZE KEY (See «ROOM OSCILLATOR DOES NOT RECOGNIZE KEY»(ref-349745-S40626637112009120800000) ) OK: Go to next step.
3. READ VALUE USING TECHSTREAM (RELAY MONITOR) Use the Data List to check if the relay monitor is functioning properly. Main Body ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note IG1 Relay Monitor (Outside) D-IG1 relay outer relay monitor/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - IG1 Relay Monitor (Inside) D-IG1 relay inner relay monitor/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - IG2 Relay Monitor (Outside) IG2 outer relay monitor/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - IG2 Relay Monitor (Inside) IG2 inner relay monitor/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - ACC Relay Monitor D-ACC relay monitor/ON or OFF ON: Engine switch on (IG) OFF: Engine switch off - OK: ON is displayed on the Techstream screen. NG: Go to step 7 OK: Go to next step.
4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU) Disconnect the L13, DF and DA main body ECU connectors. Measure the resistance and voltage according to the value(s) in the table below. Standard resistance RESISTANCE REFERENCE Tester Connection Condition Specified Condition L13-3 (IG1D) - DA-32 Always Below 1 ohms L13-3 (IG1D) or DA-32 - Body ground Always 10 kohms or higher L13-22 (ACCD) - DA-19 Always Below 1 ohms L13-22 (ACCD) or DA-19 - Body ground Always 10 kohms or higher DA-40 (GND1) - Body ground Always Below 1 ohms Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition DF-1 - Body ground Always 11 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
5. INSPECT IGNITION RELAY NO. 2 (IG2) Remove the ignition relay No. 2 from the engine room No. 2 junction block. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE REFERENCE Tester Connection Condition Specified Condition 3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kohms or higher 3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 ohms NG: REPLACE IGNITION RELAY NO. 2 (IG2) OK: Go to next step.
6. CHECK HARNESS AND CONNECTOR (NO. 2 RELAY BLOCK - MAIN BODY ECU AND STEERING LOCK ECU) Remove the ignition relay No. 2 from the engine room No. 2 junction block. Disconnect the L12 main body ECU connector. Disconnect the L33 steering lock ECU connector. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE REFERENCE Tester Connection Condition Specified Condition L12-11 (IG2D) - Relay block Ignition relay No. 2 terminal 1 Always Below 1 ohms L12-11 (IG2D) or Relay block ignition relay No. 2 terminal 1 - Body ground Always 10 kohms or higher Relay block ignition relay No. 2 terminal 2 - Body ground Always Below 1 ohms L33-6 (IG2) - Relay block Ignition relay No. 2 terminal 3 Always Below 1 ohms L33-6 (IG2) or Relay block ignition relay No. 2 terminal 3 - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE MAIN BODY ECU
7. INSPECT ENGINE SWITCH Remove the engine switch (see «REMOVAL»(ref-349725-S10348067412009120800000) ). Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE REFERENCE Tester Connection Switch Condition Specified Condition 7 (SS1) - 5 (GND) Pushed Below 1 ohms 2 (SS2) - 5 (GND) Pushed Below 1 ohms 7 (SS1) - 5 (GND) Not pushed 10 kohms or higher 2 (SS2) - 5 (GND) Not pushed 10 kohms or higher NG: REPLACE ENGINE SWITCH (See «REMOVAL»(ref-349725-S10348067412009120800000) ) OK: Go to next step.
8. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ENGINE SWITCH) Disconnect the L13 main body ECU connector. Disconnect the L36 engine switch connector. Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE REFERENCE Tester Connection Condition Specified Condition L36-7 (SS1) - L13-17 (SSW1) Always Below 1 ohms L36-2 (SS2) - L13-16 (SSW2) Always Below 1 ohms L36-5 (GND) - Body ground Always Below 1 ohms L36-7 (SS1) or L13-17 (SSW1) - Body ground Always 10 kohms or higher L36-2 (SS2) or L13-16 (SSW2) - Body ground Always 10 kohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
9. INSPECT FUSE (AM2) Remove the AM2 fuse from the passenger side junction block. Check the resistance of the fuse. Standard resistance RESISTANCE REFERENCE Tester Connection Condition Specified Condition AM2 fuse Always Below 1 ohms NG: REPLACE FUSE (AM2) OK: Go to next step.
10. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND) Disconnect the L13, L12 and DA main body ECU connectors. Measure the voltage and resistance according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition L13-6 (AM1) - Body ground Always 11 to 14 V L12-1 (AM2) - Body ground Always 11 to 14 V Standard resistance RESISTANCE REFERENCE Tester Connection Condition Specified Condition DA-40 (GND1) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE MAIN BODY ECU

1. CHECK WHETHER ENGINE STARTS AFTER STEERING LOCK INITIALIZATION Open and close the driver door when the engine switch is off. Check that the engine starts. OK: Engine starts. HINT: After the battery runs out, the engine may not start if the steering lock ECU has not been initialized (lock/unlock may not be recorded) through the procedure described above. OK: SYSTEM OK NG: Go to next step.
2. CHECK WHETHER DTC OUTPUT RECURS (MAIN BODY ECU AND CERTIFICATION ECU) Clear the DTCs (see «DTC CHECK/CLEAR»(ref-349725-S42845355162009120800000) ). HINT: After all DTCs are cleared, check if the trouble occurs again 5 seconds after the engine switch is turned on (IG). Check for DTCs again. OK: No DTC is output. NG: GO TO «DTC CHART»(ref-349725-S14053349582009120800000) OK: Go to next step.
3. CHECK ENGINE SWITCH (SWITCH CONDITION) Ensure the key is inside the cabin. With the brake pedal released, check that the power source mode changes as shown below each time the engine switch is pushed. OK: off --> on (ACC) --> on (IG) --> off NG: GO TO «POWER SOURCE MODE DOES NOT CHANGE»(ref-349725-S32662929662009120800000) OK: Go to next step.
4. CHECK BASIC FUNCTION Ensure that there is fuel in the fuel tank and the key is inside the cabin. Depress the brake pedal with the shift lever in P or N, and keep depressing the pedal. Check that the engine cranks when the engine switch is pressed. OK: Engine cranks. OK: Go to step 9 NG: Go to next step.
5. READ VALUE USING TECHSTREAM (PARK/NEUTRAL POSITION SWITCH) Use the Data List to check if the park/neutral position switch is functioning properly. Main Body ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note Neutral SW/Clutch SW Park/neutral position switch/ON or OFF ON: Shift lever in P or N OFF: Shift lever in R or D - OK: When the shift lever is in P or N, ON is displayed on the Techstream. NG: REPAIR OR REPLACE PARK/NEUTRAL POSITION SWITCH (See «REMOVAL»(ref-349712-S19120287162009120800000) ) OK: Go to next step.
6. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH) Use the Data List to check if the stop light switch is functioning properly. Main Body ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note Stop Light SW Stop Light switch/ON or OFF ON: Brake pedal is depressed OFF: Brake pedal is released - OK: When the brake pedal is depressed, ON is displayed on the Techstream. NG: REPAIR OR REPLACE STOP LIGHT SWITCH (See «STOP LIGHT SWITCH»(ref-349731-S36670972812009120800000) ) OK: Go to next step.
7. CHECK STEERING LOCK SYSTEM When the engine switch is on (ACC), check that the steering lock can be released. OK: Steering lock can be released. NG: GO TO STEERING LOCK SYSTEM (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349720-S33992761952009120800000) ) OK: Go to next step.
8. INSPECT MAIN BODY ECU Disconnect the A68 main body ECU connector. Depress the brake pedal with the shift lever in P or N, and keep depressing the pedal. Measure the voltage according to the value(s) in the table below. Standard voltage VOLTAGE SPECIFICATION Tester Connection Condition Specified Condition A68-4 (STSW) - Body ground When the engine cranks by pressing the engine switch. 11 to 14 V NG: GO TO SFI SYSTEM (CRANKING HOLDING FUNCTION CIRCUIT) (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-349724-S18283209912009120800000) ) OK: REPLACE MAIN BODY ECU
9. READ VALUE USING TECHSTREAM (ENGINE START REQUEST) Use the Data List to check if the engine start request is functioning properly. Smart Access ITEM RANGE REFERENCE Tester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Start Request (Past) Starter request signal/OK or NG (PAST) OK: ID code box receives immobilizer unset signal NG (PAST): ID code box does not receive immobilizer unset signal - OK: When ID code box receives immobilizer unset signal, OK is displayed on the Techstream. NG: REPLACE CERTIFICATION ECU OK: REPLACE ID CODE BOX

ON-VEHICLE INSPECTION

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation. NOTE: After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
2. REMOVE STARTER CUT RELAY (ST CUT) Remove the starter cut relay from the engine room No. 2 relay block.
3. INSPECT STARTER CUT RELAY Measure the resistance according to the value(s) in the table below. Standard resistance RESISTANCE REFERENCE Terminal Connection Condition Specified Condition 3 - 5 When battery voltage is not applied to terminals 1 and 2 10 kohms or higher 3 - 5 When battery voltage is applied to terminals 1 and 2 Below 1 ohms If the result is not as specified, replace the relay.
4. INSTALL STARTER CUT RELAY
5. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
6. PERFORM INITIALIZATION Perform initialization (see «INITIALIZATION»(ref-349706-S07943075812009120800000) ). NOTE: Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.

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