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Smart Access System (Keyless Start) (Diagnostic Codes & Symptom Tests): Other Lexus ES XV60

Starter ~2845 words

PROCEDURE

  1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598458-S28920021412014021400000) . Turn the engine switch on (IG). After 330 seconds have elapsed, check for DTCs. OK DTC B2277 is not output HINT: If there are any signs that water was present, before replacing the certification ECU (smart key ECU assembly), take measures to prevent any further water entry. NG --> See step 2 OK --> See step 3
  2. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [06/2012 - ]»(ref-598651-S32321076912014021400000)
  3. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [06/2012 - ]»(ref-598449-S34618498472014021400000)
  1. READ VALUE USING TECHSTREAM 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 / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Specified Condition Stop Light Switch1 State of brake pedal/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released Use this item to determine whether the stop light switch is malfunctioning. The engine cannot be started when this item is OFF. When this item is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time. OK The Techstream display changes correctly in response to the brake pedal operation. NG --> See step 5 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY) Disconnect the A28 stop light switch assembly connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A36-18 (STP1) - A28-2 (L) Always Below 1 ohms A36-18 (STP1) or A28-2 (L) - Body ground Always 10 kohms or higher Reconnect the A28 stop light switch assembly connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition A36-18 (STP1) - Body ground Brake pedal released 1 V or less Brake pedal depressed 9 V or higher TEXT IN ILLUSTRATION *a Rear view of wire harness connector (Certification ECU (Smart Key ECU Assembly)) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 6
  5. GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [06/2012 - ]»(ref-598472-S27279576312014021400000)
  6. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [06/2012 - ]»(ref-598651-S32321076912014021400000)
  1. CHECK FOR DTC (LIN COMMUNICATION SYSTEM) Check for DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . OK LIN communication system DTC B2785 is not output simultaneously. HINT: If the steering cannot be unlocked, the engine switch cannot be turned on (IG) and the engine cannot be started. If LIN communication is not available, the steering cannot be locked or unlocked. NG --> See step 7 OK: Go to next step
  2. READ VALUE USING TECHSTREAM 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 / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Steering Unlock Switch State of steering unlock sensor signal output from steering lock actuator assembly/ON or OFF ON: Steering unlocked OFF: Steering locked When the shift lever is in P and the engine switch is off, if any door is opened then 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 sensor signal is off. Result Result Proceed to Data List display does not change A Data List display changes B B --> See step 9 A: Go to next step
  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Positive (+) tester probe --> H18-4 (SLP1) Negative (-) tester probe --> Body ground Steering locked* 10 kohms or higher Steering unlocked* Below 1 ohms HINT: *: If any of the doors are opened then closed with the shift lever in P and the engine switch off, the steering will be locked. If the engine switch is then turned on (ACC) or on (IG), the steering will be unlocked. DTC B2285 may be stored due to a malfunction in the steering lock ECU (steering lock actuator assembly). The steering lock position signal and unlock position signal are sent from the steering lock ECU (steering lock actuator assembly) to the certification ECU (smart key ECU assembly) individually. TEXT IN ILLUSTRATION *a Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly)) NG --> See step 9 OK: Go to next step
  6. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Disconnect the H56 certification ECU (smart key ECU assembly) connector. Disconnect the H18 steering lock ECU (steering lock actuator assembly) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H56-26 (SLP) - H18-4 (SLP1) Always Below 1 ohms H56-26 (SLP) or H18-4 (SLP1) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 8
  7. GO TO DTC B2785. Refer to «DTC B2785: Communication Malfunction between ECUs Connected by LIN»(ref-598671-S35850264742014021400000)
  8. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [06/2012 - ]»(ref-598651-S32321076912014021400000)
  9. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY). Refer to «DISASSEMBLY [06/2012 - ]»(ref-598450-S40355313682014021400000)
  1. READ VALUE USING TECHSTREAM 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 or Starting Control / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Condition Engine state/Stop or Run Stop: Engine stopped Run: Engine running - STARTING CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Engine Speed Engine speed/0 to 16383 r/min Fluctuates in accordance with engine speed - OK On the Techstream screen, the display changes as shown in the charts above. Result Result Proceed to NG A OK B B --> See step 6 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ECM) Disconnect the A22 ECM connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A36-16 (NE) - A22-22 (NEO) Always Below 1 ohms A36-16 (NE) or A22-22 (NEO) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  5. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Reconnect the A36 certification ECU (smart key ECU assembly) connector. Check the engine speed input signal waveform at the terminal of the certification ECU. Standard Frequency Tester Connection Condition Specified Condition A36-16 (NE) - Body ground Engine stopped No pulse generated Engine running Pulse generated TEXT IN ILLUSTRATION *a Component with harness connected (Certification ECU (Smart Key ECU Assembly)) NG --> See step 6 OK --> See step 7
  6. GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [06/2012 - ]»(ref-598472-S27279576312014021400000)
  7. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [06/2012 - ]»(ref-598651-S32321076912014021400000)
  1. CHECK FOR DTC Note any DTCs that are output. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598458-S28920021412014021400000) . NEXT --> See step 2
  2. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [06/2012 - ]»(ref-598635-S10414945732014021400000)
  1. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM Check the wireless door lock function by operating the electrical key transmitter sub-assembly. OK Wireless door lock function operates. NG --> See step 18 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START Remove the battery from the electrical key transmitter sub-assembly. Refer to «REPLACEMENT [06/2012 - ]»(ref-598660-S22012350222014021400000) . With the brake pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch and check if the power source mode changes. OK The power source mode changes. HINT: If the power source mode changes, the cabin verification is malfunctioning. Result Result Proceed to The power source mode does not change. A The power source mode changes. B TEXT IN ILLUSTRATION *1 Engine Switch *2 Electrical Key Transmitter Sub-assembly B --> See step 8 A: Go to next step
  5. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the Techstream on. Enter the following menus: Body Electrical / Power Source Control / Data List. Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Specified Condition Stop Light Switch1 State of brake pedal/ON or OFF ON: Brake pedal depressed OFF: Brake pedal released Use this item to determine whether the stop light switch is malfunctioning. The engine cannot be started when this item is OFF. When this item is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time. OK The Techstream display changes correctly in response to the brake pedal operation. NG --> See step 11 OK: Go to next step
  6. READ VALUE USING TECHSTREAM Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Power Supply Condition Power supply state/IG2 ON, ST ON, All OFF, IG1 ON or ACC ON ALL OFF: Engine switch off ACC ON: Engine switch on (ACC) (ACC relay on) IG1 ON: Engine switch on (IG) (IG1 relay on) IG2 ON: Engine switch on (IG) (IG2 relay on) ST ON: Sending engine start request signal Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time). With the engine switch off and brake pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch for 2 seconds or more and read the Data List. OK IG2 ON is displayed on the Techstream screen. HINT: If the smart access system with push-button start (for Start Function) function has been canceled on the customization menu, ACC ON is displayed on the Techstream screen. NG --> See step 14 OK: Go to next step
  7. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Measure the voltage according to the value(s) in the table below. TEXT IN ILLUSTRATION *a Component with harness connected (Certification ECU (Smart Key ECU Assembly)) - - Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Power Supply Condition Power supply state/IG2 ON, ST ON, All OFF, IG1 ON or ACC ON All OFF: Engine switch off (ACC and IG) ACC ON: Engine switch on (ACC) IG1 ON: Engine switch on (IG) (IG1 relay on) IG2 ON: Engine switch on (IG) (IG2 relay on) ST ON: Sending engine start request signal Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time). Measure the voltage while reading the Data List on the Techstream. Standard Voltage Tester Connection Condition Specified Condition H56-6 (IG1D) - Body ground Engine switch off 1 V or less Engine switch on (ACC) 1 V or less Engine switch on (IG) 9 V or higher A36-9 (IG2D) - Body ground Engine switch off 1 V or less Engine switch on (ACC) 1 V or less Engine switch on (IG) 9 V or higher H56-4 (ACCD) - Body ground Engine switch off 1 V or less Engine switch on (IG) 8.5 V or higher Engine switch on (ACC) 8.5 V or higher NG --> See step 15 OK --> CHECK RELAY CONTACT SIDE CIRCUIT
  8. READ VALUE USING TECHSTREAM Read the Data List according to the display on the Techstream. POWER SOURCE CONTROL Tester Display Measurement Item/Range Normal Condition Diagnostic Note Start Switch1 Engine switch 1 status/ON or OFF ON: Engine switch pressed OFF: Engine switch not 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/ON or OFF ON: Engine switch pressed OFF: Engine switch not 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. OK The Techstream display changes correctly in response to the engine switch operation. Result Result Proceed to NG A OK B B --> See step 19 A: Go to next step
  9. INSPECT ENGINE SWITCH Inspect the engine switch. Refer to «INSPECTION [06/2012 - ]»(ref-598603-S19413057192014021400000) . NG --> See step 16 OK: Go to next step
  10. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE SWITCH) Disconnect the H56 certification ECU (smart key ECU assembly) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H56-28 (SSW1) - H44-5 (SS1) Always Below 1 ohms H56-30 (SSW2) - H44-1 (SS2) Always Below 1 ohms H56-28 (SSW1) or H44-5 (SS1) - Body ground Always 10 kohms or higher H56-30 (SSW2) or H44-1 (SS2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 15
  11. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER SOURCE AND BODY GROUND) See step 21 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  12. CHECK STOP LIGHT SWITCH ASSEMBLY See step 22 NG --> See step 20 OK: Go to next step
  13. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY) See step 4 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 15
  14. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598458-S28920021412014021400000) . Result Result Proceed to The following DTCs are not output: B2784 B287A A DTC B2784 is output. B DTC B278A is output. C B --> See step 17 C --> See step 21 A --> REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY
  15. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [06/2012 - ]»(ref-598651-S32321076912014021400000)
  16. REPLACE ENGINE SWITCH. Refer to «REMOVAL [06/2012 - ]»(ref-598603-S04865255682014021400000)
  17. GO TO DIAGNOSTIC TROUBLE CODE CHART (DTC B2784). Refer to «DTC B2784: Antenna Coil Open / Short»(ref-598702-S31833755322014021400000)
  18. GO TO OTHER DIAGNOSTIC PROCEDURE (All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate). Refer to «All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate»(ref-598699-S02561461402014021400000)
  19. GO TO DIAGNOSTIC PROCEDURE (Room Oscillator does not Recognize Key). Refer to «Room Oscillator does not Recognize Key»(ref-598699-S15199373312014021400000)
  20. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598610-S02321745302014021400000)
  21. GO TO DIAGNOSTIC TROUBLE CODE CHART (DTC B278A). Refer to «DTC B278A: Short to GND in Immobilizer System Power Source Circuit»(ref-598702-S35092670132014021400000)
  1. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) See step 3 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY See step 4 NG --> See step 4 OK: Go to next step
  3. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) See step 5 NG --> See step 5 OK --> CHECK RELAY CONTACT SIDE CIRCUIT
  4. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
  5. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [06/2012 - ]»(ref-598651-S32321076912014021400000)

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