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LIN Communication System (Diagnostic Codes): Other Lexus ES XV60

Communication Devices ~2286 words

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - OPTION CONNECTOR) Disconnect the H10 main body ECU (multiplex network body ECU) connector. Disconnect the H151 option connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H10-25 (BTX) - H151-7 (BTX) Always Below 1 ohms H10-26 (BRX) - H151-3 (BRX) Always Below 1 ohms H10-26 (BRX) - Body ground Always 10 kohms or higher H151-3 (BRX) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. REPLACE OPTION CONNECTOR Replace the option connector. NEXT: Go to next step
  3. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Recheck for DTCs. OK DTC B126A and B1269 are not output. NG --> See step 4 OK --> END (OPTION CONNECTOR ECU WAS DEFECTIVE)
  4. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
  1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000) . Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. HINT: This inspection is to check the LIN line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU). Standard Resistance Tester Connection Condition Specified Condition 3B-30 (LIN2)- MB-16 (LIN2) Always Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) *b Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 6 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - SLIDING ROOF ECU) Disconnect the T4 sliding roof ECU (sliding roof drive gear sub-assembly) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3B-30 (LIN2) - T4-11 (MPX1) Always Below 1 ohms 3B-30 (LIN2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY, BODY GROUND) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition T4-8 (B) - T4-12 (E) Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition T4-12 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) Replace the sliding roof ECU (sliding roof drive gear sub-assembly). Refer to «REMOVAL [06/2012 - ]»(ref-598692-S32707791212014021400000) for Standard. Refer to «REMOVAL [06/2012 - ]»(ref-598692-S04128187732014021400000) for Glass Roof). NEXT: Go to next step
  5. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Recheck for DTCs. OK DTC B1273 is not output. NG --> See step 7 OK --> END (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) WAS DEFECTIVE)
  6. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
  7. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
  1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000) . Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. HINT: This inspection is to check the LIN line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU). Standard Resistance Tester Connection Condition Specified Condition 3B-30 (LIN2) - MB-16 (LIN2) Always Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) *b Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 6 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door)) Disconnect the L9 power window regulator motor assembly (for front passenger door) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3B-30 (LIN2) - L9-9 (LIN) Always Below 1 ohms 3B-30 (LIN2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door) - BATTERY, BODY GROUND) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition L9-2 (B) - Body ground Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition L9-1 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door) Replace the power window regulator motor assembly (for front passenger door). Refer to «REMOVAL [06/2012 - ]»(ref-598693-S32047285602014021400000) . NEXT: Go to next step
  5. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Check for DTCs. OK DTC B2322 is not output. NG --> See step 7 OK --> END (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door) WAS DEFECTIVE)
  6. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
  7. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
  1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000) . Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Measure the resistance according to the value(s) in the table below. HINT: This inspection is to check the LIN line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU). Standard Resistance Tester Connection Condition Specified Condition 3B-30 (LIN2) - MB-16 (LIN2) Always Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Instrument Panel Junction Block Assembly) *b Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 6 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door)) Disconnect the N2 power window regulator motor assembly (for rear RH door) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 3B-30 (LIN2) - N2-9 (LIN) Always Below 1 ohms 3B-30 (LIN2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door) - BATTERY, BODY GROUND) Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition N2-2 (B) - Body ground Always 11 to 14 V Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition N2-1 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door) Replace the power window regulator motor assembly (for rear RH door). Refer to «REMOVAL [06/2012 - ]»(ref-598693-S39681092412014021400000) . NEXT: Go to next step
  5. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Check for DTCs. OK DTC B2323 is not output. NG --> See step 7 OK --> END (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door) WAS DEFECTIVE)
  6. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
  7. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL [06/2012 - ]»(ref-598640-S21213941222014021400000)
  1. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - EACH ECU) Disconnect the H56 certification ECU (smart key ECU assembly) connector. Disconnect the H18 steering lock ECU (steering lock actuator assembly) connector. Disconnect the H15 ID code box (immobilizer code ECU) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H56-17 (LIN) - H18-5 (LIN) Always Below 1 ohms H56-17 (LIN) - H15-2 (LIN1) Always Below 1 ohms H56-17 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK DTC OUTPUT (STEERING LOCK ECU) Reconnect the H56 certification ECU (smart key ECU assembly) connector. Reconnect the H15 ID code box (immobilizer code ECU) connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Recheck for DTCs. Result Result Proceed to DTC B2785 is output A DTC B2785 is not output B B --> See step 4 A: Go to next step
  3. CHECK DTC OUTPUT (ID CODE BOX (IMMOBILIZER CODE ECU)) Reconnect the H18 steering lock ECU (steering lock actuator assembly) connector. Disconnect the H15 ID code box (immobilizer code ECU) connector. Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Recheck for DTCs. Result Result Proceed to DTC B2785 is output A DTC B2785 is not output B B --> See step 5 A --> See step 6
  4. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY). Refer to «DISASSEMBLY [06/2012 - ]»(ref-598450-S40355313682014021400000)
  5. REPLACE ID CODE BOX (IMMOBILIZER CODE ECU). Refer to «REMOVAL [06/2012 - ]»(ref-598651-S37481704612014021400000)
  6. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [06/2012 - ]»(ref-598651-S32321076912014021400000)
  1. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Recheck for DTCs. Result Result Proceed to Only B2786 is output A DTC B2786 and B2785 are output simultaneously B HINT: When DTC B2786 and B2785 are output simultaneously, perform troubleshooting for DTC B2785 first. B --> See step 7 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) - BATTERY AND BODY GROUND) Disconnect the H18 steering lock ECU (steering lock actuator assembly) connector. Measure the resistance and voltage according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H18-1 (GND) - Body ground Always Below 1 ohms Standard Voltage Tester Connection Condition Specified Condition H18-7 (B) - Body ground Always 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. 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. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H56-17 (LIN) - H18-5 (LIN) Always Below 1 ohms H56-17 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Replace the steering lock ECU (steering lock actuator assembly). Refer to «DISASSEMBLY [06/2012 - ]»(ref-598450-S40355313682014021400000) . NEXT: Go to next step
  5. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Recheck for DTCs. OK DTC B2786 is not output. NG --> See step 6 OK --> END (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) WAS DEFECTIVE)
  6. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [06/2012 - ]»(ref-598651-S32321076912014021400000)
  7. GO TO DTC B2785. Refer to «DTC B2785: Communication Malfunction between ECUs Connected by LIN»(ref-598671-S35850264742014021400000)
  1. CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILIZER CODE ECU) - BATTERY AND BODY GROUND) (ID CODE BOX - BATTERY AND BODY GROUND) Disconnect the H15 ID code box (immobilizer code ECU). Measure the resistance and voltage according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H15-5 (GND) - Body ground Always Below 1 ohms Standard Voltage Tester Connection Condition Specified Condition H15-1 (+B) - Body ground Always 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ID CODE BOX (IMMOBILIZER CODE ECU)) 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 H56-17 (LIN) - H15-2 (LIN1) Always Below 1 ohms H56-17 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. REPLACE ID CODE BOX (IMMOBILIZER CODE ECU) Replace the ID code box (immobilizer code ECU). Refer to «REMOVAL [06/2012 - ]»(ref-598651-S37481704612014021400000) . NEXT: Go to next step
  4. CHECK DTC OUTPUT Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . Recheck for DTCs. OK DTC B2789 is not output. NG --> See step 5 OK --> END (ID CODE BOX (IMMOBILIZER CODE ECU) WAS DEFECTIVE)
  5. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [06/2012 - ]»(ref-598651-S32321076912014021400000)
  1. CLEAR DTC Clear the DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . NEXT: Go to next step
  2. CHECK FOR DTC Check for DTCs. Refer to «DTC CHECK / CLEAR [06/2012 - ]»(ref-598669-S03554316722014021400000) . OK DTC B278C is not output. NG --> See step 3 OK --> See step 4
  3. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL [06/2012 - ]»(ref-598651-S32321076912014021400000)
  4. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING [06/2012 - ]»(ref-598449-S34618498472014021400000)

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