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Smart Access System (Keyless Start) (Diagnostic Codes & Symptom Tests): Other Lexus GS IV

Starter ~2212 words

PROCEDURE

  1. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600421-S32166931542014022400000) . Turn the power switch on (IG). After 25 seconds have elapsed, check if the DTC has been set again. OK DTC B2285 is not output. 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 --> See step 4
  4. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000)
  5. GO TO DTC CHART (DTC B2285). Refer to «DTC B2285: Steering Lock Position Signal Circuit Malfunction»(ref-600589-S07197516752014022400000)
  1. CHECK FOR WATER DAMAGE Check the power source control ECU, surrounding parts, wire harnesses and connectors for any signs of water damage. RESULT Result Proceed to No signs of water damage A Signs of water damage B B --> TAKE MEASURES AGAINST CAUSE OF WATER DAMAGE AND REPLACE POWER MANAGEMENT CONTROL ECU) A --> See step 2
  2. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000)
  1. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH ASSEMBLY) Connect the Techstream to the DLC3. Turn the power 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 hybrid control system cannot be started when this item is OFF. When this item is malfunctioning, the hybrid control system can be started by pressing and holding the power switch for a certain period of time. OK ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen. NG --> See step 2 OK --> See step 5
  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 (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) Disconnect the A5 connector from the stop light switch assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N92-10 (STP) - A5-2(L) Always Below 1 ohms N92-10 (STP) or A5-2(L) - Body ground Always 10 kohms or higher Reconnect the A5 stop light switch assembly connector. Disconnect the connector from the power management control ECU. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition N92-10 (STP) - Body ground Brake pedal released 1 V or less Brake pedal depressed 9 V or higher TEXT IN ILLUSTRATION *a Front view of wire harness connector (to Power Management Control ECU) 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 [03/2012 - ]»(ref-600436-S13228048082014022400000)
  6. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000)
  1. 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
  2. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600421-S32166931542014022400000) . Turn the power switch on (IG). After 25 seconds have elapsed, check if the DTC has been output again. OK DTC B2286 is not output NG --> See step 4 OK --> See step 5
  4. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000)
  5. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)
  1. CHECK FOR DTC Note any DTCs that are output. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600421-S32166931542014022400000) . NEXT --> See step 2
  2. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600588-S38298476802014022400000)
  1. 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
  2. CHECK HARNESS AND CONNECTOR (GROUND) See step 2 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK FOR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-600421-S32166931542014022400000) . Check for DTCs again. OK DTC U0293 is not output NG --> See step 4 OK --> See step 5
  4. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000)
  5. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [03/2012 - ]»(ref-600412-S12576599882014022400000)
  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 17 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 PUSH-BUTTON START FUNCTION Remove the battery from the electrical key transmitter sub-assembly. Refer to «REPLACEMENT [03/2012 - ]»(ref-600679-S30158624912014022400000) . With the brake pedal depressed, hold the electrical key transmitter near the power 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 B --> See step 8 A: Go to next step
  5. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH 1) 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 hybrid control system cannot be started when this item is OFF. When this item is malfunctioning, the hybrid control system can be started by pressing and holding the power switch for a certain period of time. OK ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen. 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: Power switch off ACC ON: Power switch on (ACC) (ACC relay on) IG1 ON: Power switch on (IG) (IG1 relay on) IG2 ON: Power switch on (IG) (IG2 relay on) ST ON: Sending hybrid control system 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 power switch off and brake pedal depressed, hold the electrical key transmitter sub-assembly near the power switch for 2 seconds or more and read the Data List. OK IG2 ON is displayed in the Data List. HINT: If the smart key function has been canceled on the customization menu, ACC ON is displayed in the Data List. NG --> See step 13 OK: Go to next step
  7. CHECK POWER MANAGEMENT CONTROL ECU Read the Data List according to the display on the Techstream. Measure the voltage according to the value(s) in the table below. TEXT IN ILLUSTRATION *a Component with harness connected (Power Management Control ECU) 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: Power switch off (ACC and IG) ACC ON: Power switch on (ACC) (ACC relay on) IG1 ON: Power switch on (IG) (IG1 relay on) IG2 ON: Power switch on (IG) (IG2 relay on) ST ON: Sending hybrid control system 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 checking the Data List on the Techstream. Standard Voltage Tester Connection Condition Specified Condition N92-2 (IG1D) - Body ground Power switch off 1 V or less Power switch on (ACC) Power switch on (IG) 9 V or higher A36-2 (IG2D) - Body ground Power switch off 1 V or less Power switch on (ACC) Power switch on (IG) 9 V or higher N92-1 (ACCD) - Body ground Power switch off 1 V or less Power switch on (IG) 8.5 V or higher Power switch on (ACC) NG --> See step 14 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 Power switch 1 status/ON or OFF ON: Power switch pressed OFF: Power switch not pressed If the power switch is pressed for a short time, the display may not change. Use this item to determine whether the power switch input signal is malfunctioning. Start Switch2 Power switch 2 status/ON or OFF ON: Power switch pressed OFF: Power switch not pressed Backup for power switch 1. However, when the power switch is pressed and held, the control functions only when both power switch 1 and 2 are normal. Behaves the same way as power switch 1. OK ON (Power switch is pressed) and OFF (Power switch is not pressed) appear on the screen. Result Result Proceed to NG A OK B B --> See step 19 A: Go to next step
  9. INSPECT POWER SWITCH Inspect the power switch. Refer to «INSPECTION [03/2012 - ]»(ref-600616-S09201048582014022400000) . NG --> See step 15 OK: Go to next step
  10. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - POWER SWITCH) Disconnect the N91 and N92 connectors from the power management control ECU. Disconnect the N43 connector from the power switch. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N91-7 (SSW1) - N43-5 (SS1) Always Below 1 ohms N91-17 (SSW2) - N43-1 (SS2) N91-7 (SSW1) or N43-5 (SS1) - Body ground 10 kohms or higher N92-17 (SSW2) or N43-1 (SS2) - Body ground NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 21
  11. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - STOP LIGHT SWITCH ASSEMBLY) See step 4 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  12. INSPECT STOP LIGHT SWITCH ASSEMBLY See step 14 NG --> See step 20 OK --> See step 22
  13. CHECK FOR DTC Enter the following menus: Body Electrical / Smart Access / Trouble Codes. Check for DTCs. Result Result Proceed to The following DTCs are not output: B2785 B2287 B2784 B278A A DTC B2785 is not output but DTC B2287 is output. B DTCs other than B2287 are output. C B --> See step 16 C --> GO TO OTHER FLOWCHART A --> See step 18
  14. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000)
  15. REPLACE POWER SWITCH. Refer to «REMOVAL [03/2012 - ]»(ref-600616-S19306241022014022400000)
  16. GO TO OTHER FLOWCHART (DTC B2287). Refer to «DTC B2287: LIN Communication Master Malfunction»(ref-600650-S34924482532014022400000)
  17. GO TO OTHER FLOWCHART (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-600680-S26168028872014022400000)
  18. REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY. Refer to «REMOVAL [03/2012 - ]»(ref-600679-S39861901692014022400000)
  19. GO TO OTHER FLOWCHART (Room Oscillator does not Recognize Key). Refer to «Room Oscillator does not Recognize Key»(ref-600680-S03067778712014022400000)
  20. REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to «REMOVAL [03/2012 - ]»(ref-600609-S30447008282014022400000)
  21. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000)
  22. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000)
  1. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - COWL SIDE JUNCTION BLOCK RH) See step 3 NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. INSPECT COWL SIDE JUNCTION BLOCK RH (RH-ACC RELAY) See step 4 NG --> REPLACE COWL SIDE JUNCTION BLOCK RH OK: Go to next step
  3. INSPECT POWER MANAGEMENT CONTROL ECU See step 5 NG --> See step 4 OK --> CHECK RELAY CONTACT SIDE CIRCUIT
  4. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL [03/2012 - ]»(ref-600595-S22014970062014022400000)

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