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LIN Communication System (Diagnostic Codes): Other Lexus HS I

Communication Devices ~2388 words

PROCEDURE

  1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Refer to «REMOVAL»(ref-398241-S22735242352011051600000) . 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 communication 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 2A-27 (LIN2) - MB-16 (LIN2) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Instrument Panel Junction Block Assembly) *2 Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 6 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SLIDING ROOF ECU) Disconnect the P6 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 2A-27 (LIN2) - P6-4 (MPX1) Always Below 1 ohms 2A-27 (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 resistance and voltage according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition P6-2 (E) - Body ground Always Below 1 ohms Standard Voltage Tester Connection Condition Specified Condition P6-1 (B) - P6-2 (E) Power switch off 11 to 14 V 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»(ref-398324-S15225177022011051600000) . NEXT: Go to next step
  5. CHECK DTC OUTPUT Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-398321-S04390048072011051600000) . Recheck for DTCs. OK DTC B1273 is not output. NG --> See step 7 OK --> END (SLIDING ROOF ECU WAS DEFECTIVE)
  6. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL»(ref-398241-S22735242352011051600000)
  7. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(ref-398241-S22735242352011051600000)
  1. CHECK DTC OUTPUT Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-398321-S04390048072011051600000) . Recheck for DTCs. HINT: Check the both "Smart Access" and "Power Source Control" DTCs. Result Result Proceed to Only DTC B2287 is output. A DTC B2287 and B2785 are output simultaneously. B HINT: When DTC B2287 and B2785 are output simultaneously, perform troubleshooting for DTC B2785 first. B --> See step 6 A: Go to next step
  2. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - POWER MANAGEMENT CONTROL ECU) Disconnect the F52 power management control ECU and L50 certification ECU (smart key ECU assembly) connectors. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F52-24 (LIN2) - L50-29 (LIN) Always Below 1 ohms F52-24 (LIN2) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. REPLACE POWER MANAGEMENT CONTROL ECU Replace the power management control ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000) . NEXT: Go to next step
  4. CHECK DTC OUTPUT Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-398321-S04390048072011051600000) . Recheck for DTCs. OK DTC B2287 is not output. NG --> See step 5 OK --> END (POWER MANAGEMENT CONTROL ECU WAS DEFECTIVE)
  5. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-398251-S14180786362011051600000)
  6. GO TO DTC B2785. Refer to «DTC B2785: Communication Malfunction between ECUs Connected by LIN»(ref-398322-S02519857462011051600000)
  1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Refer to «REMOVAL»(ref-398241-S22735242352011051600000) . 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 communication 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 2A-27 (LIN2) - MB-16 (LIN2) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Instrument panel Junction Block Assembly) *2 Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 6 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - POWER WINDOW REGULATOR MOTOR) Disconnect the H6 power window regulator motor assembly (for front passenger side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2A-27 (LIN2) - H6-9 (LIN) Always Below 1 ohms 2A-27 (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 - BATTERY, BODY GROUND) Measure the resistance and voltage according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H6-1 (GND) - Body ground Always Below 1 ohms Standard Voltage Tester Connection Condition Specified Condition H6-2 (B) - Body ground Power switch off 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for FRONT PASSENGER SIDE) Replace the power window regulator motor assembly (for front passenger side). Refer to «REMOVAL»(ref-398306-S23446025772011051600000) . NEXT: Go to next step
  5. CHECK DTC OUTPUT Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-398321-S04390048072011051600000) . Check for DTCs. OK DTC B2322 is not output. NG --> See step 7 OK --> END (POWER WINDOW REGULATOR MOTOR ASSEMBLY WAS DEFECTIVE)
  6. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL»(ref-398241-S22735242352011051600000)
  7. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(ref-398241-S22735242352011051600000)
  1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Remove the instrument panel junction block assembly. Refer to «REMOVAL»(ref-398241-S22735242352011051600000) . 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 communication 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 2A-27 (LIN2) - MB-16 (LIN2) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Component without harness connected (Instrument Panel Junction Block Assembly) *2 Component without harness connected (Instrument Panel Junction Block Assembly) NG --> See step 6 OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - POWER WINDOW REGULATOR MOTOR) Disconnect the J3 power window regulator motor assembly (for rear RH side) connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2A-27 (LIN2) - J3-9 (LIN) Always Below 1 ohms 2A-27 (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 - BATTERY, BODY GROUND) Measure the resistance and voltage according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition J3-1 (GND) - Body ground Always Below 1 ohms Standard Voltage Tester Connection Condition Specified Condition J3-2 (B) - Body ground Power switch off 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. REPLACE POWER WINDOW REGULATOR MOTOR (for REAR RH SIDE) Replace the power window regulator motor assembly (for rear RH side). Refer to «REMOVAL»(ref-398306-S05137991222011051600000) . NEXT: Go to next step
  5. CHECK DTC OUTPUT Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-398321-S04390048072011051600000) . Check for DTCs. OK DTC B2323 is not output. NG --> See step 7 OK --> END (POWER WINDOW REGULATOR MOTOR ASSEMBLY WAS DEFECTIVE)
  6. REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to «REMOVAL»(ref-398241-S22735242352011051600000)
  7. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to «REMOVAL»(ref-398241-S22735242352011051600000)
  1. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - EACH ECU) Disconnect the F50 certification ECU (smart key ECU assembly), F52 power management control ECU, F16 ID code box (immobiliser code ECU) and A36 transmission control ECU assembly connectors. Measure the resistance and voltage according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F50-29 (LIN) - A36-24 (LIN) Always Below 1 ohms F50-29 (LIN) - F52-24 (LIN2) Always Below 1 ohms F50-29 (LIN) - F16-3 (LIN1) Always Below 1 ohms F50-29 (LIN) - Body ground Always 10 kohms or higher Standard Voltage Tester Connection Condition Specified Condition F50-29 (LIN) - Body ground Always Below 1 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK DTC OUTPUT (TRANSMISSION CONTROL ECU ASSEMBLY) Reconnect the F50 certification ECU (smart key ECU assembly), F52 power management control ECU and F16 ID code box (immobiliser code ECU) connectors. Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-398321-S04390048072011051600000) . After 10 seconds have elapsed, check if the DTC is stored again. Recheck for DTCs. Result Result Proceed to DTC B2785 is output A DTC B2785 is not output B B --> See step 5 A: Go to next step
  3. CHECK DTC OUTPUT (POWER MANAGEMENT CONTROL ECU) Reconnect the A36 transmission control ECU assembly connector. Disconnect the F52 power management control ECU connector. Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-398321-S04390048072011051600000) . After 10 seconds have elapsed, check if the DTC is stored again. Recheck for DTCs. Result Result Proceed to DTC B2785 is output A DTC B2785 is not output B B --> See step 8 A: Go to next step
  4. CHECK DTC OUTPUT (ID CODE BOX (IMMOBILISER CODE ECU)) Reconnect the F52 power management control ECU connector. Disconnect the F16 ID code box (immobiliser code ECU) connector. Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-398321-S04390048072011051600000) . After 10 seconds have elapsed, check if the DTC is stored again. Recheck for DTCs. Result Result Proceed to DTC B2785 is output A DTC B2785 is not output B B --> See step 6 A --> See step 7
  5. REPLACE TRANSMISSION CONTROL ECU ASSEMBLY. Refer to «REMOVAL»(ref-398214-S32691384452011051600000)
  6. REPLACE ID CODE BOX (IMMOBILISER CODE ECU). Refer to «REMOVAL»(ref-398251-S11690986392011051600000)
  7. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-398251-S14180786362011051600000)
  8. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000)
  1. CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL ECU ASSEMBLY - BATTERY AND BODY GROUND) Disconnect the A35 and A36 transmission control ECU assembly connectors. Measure the resistance and voltage according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition A36-6 (E01) - Body ground Always Below 1 ohms A36-5 (E02) - Body ground Always Below 1 ohms Standard Voltage Tester Connection Condition Specified Condition A35-15 (BATT) - Body ground Power switch off 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - TRANSMISSION CONTROL ECU ASSEMBLY) Disconnect the F50 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 F50-29 (LIN) - A36-24 (LIN) Always Below 1 ohms F50-29 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. REPLACE TRANSMISSION CONTROL ECU ASSEMBLY Replace the transmission control ECU assembly. Refer to «REMOVAL»(ref-398214-S32691384452011051600000) . NEXT: Go to next step
  4. CHECK DTC OUTPUT Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-398321-S04390048072011051600000) . Recheck for DTCs. OK DTC B2786 is not output. NG --> See step 5 OK --> END (TRANSMISSION CONTROL ECU ASSEMBLY WAS DEFECTIVE)
  5. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-398251-S14180786362011051600000)
  1. CHECK HARNESS AND CONNECTOR (ID CODE BOX - BATTERY AND BODY GROUND) Disconnect the F16 ID code box connector. Measure the resistance and voltage according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F16-8 (GND) - Body ground Always Below 1 ohms Standard Voltage Tester Connection Condition Specified Condition F16-1 (+B) - Body ground Power switch off 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ID CODE BOX) Disconnect the F50 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 F50-29 (LIN) - F16-3 (LIN1) Always Below 1 ohms F50-29 (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 (IMMOBILISER CODE ECU) Replace the ID code box (immobiliser code ECU). Refer to «REMOVAL»(ref-398251-S11690986392011051600000) . NEXT: Go to next step
  4. CHECK DTC OUTPUT Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-398321-S04390048072011051600000) . Recheck for DTCs. OK DTC B2789 is not output. NG --> See step 5 OK --> END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE)
  5. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-398251-S14180786362011051600000)
  1. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY AND BODY GROUND) Disconnect the F52 power management control ECU connector. Measure the resistance and voltage according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F52-6 (GND) - Body ground Always Below 1 ohms F52-2 (GND2) - Body ground Always Below 1 ohms Standard Voltage Tester Connection Condition Specified Condition F52-1 (AM22) - Body ground Power switch off 11 to 14 V F52-2 (AM21) - Body ground Power switch off 11 to 14 V NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - POWER MANAGEMENT CONTROL ECU) Disconnect the L50 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 L50-29 (LIN) - F52-24 (LIN2) Always Below 1 ohms L50-29 (LIN) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. REPLACE POWER MANAGEMENT CONTROL ECU Replace the power management control ECU. Refer to «REMOVAL»(ref-398241-S24139773802011051600000) . NEXT: Go to next step
  4. CHECK DTC OUTPUT Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-398321-S04390048072011051600000) . Recheck for DTCs. OK DTC B278C is not output. NG --> See step 5 OK --> END (POWER MANAGEMENT CONTROL ECU WAS DEFECTIVE)
  5. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-398251-S14180786362011051600000)

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