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Contents Section: Communication Devices All sections

Multiplex Communication System (Diagnostic Codes): Other Toyota Avalon XX30 рестайлинг 2

Communication Devices ~2095 words

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (BODY ECU - BATTERY AND BODY GROUND) Disconnect the IA and IF ECU connector. Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition IA-1 (BATB) - Body ground Always 10 to 14 V Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition IF-10 (GND1) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the D6, D13, IR and E30 ECU connectors. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition IR-9 (MPX1) - E30-33 (MPX+) Always Below 1 ohms D6-21 (MPX2) - D13-6 (MPX1) Below 1 ohms Result Result Proceed to Both are OK A One is OK B Both are NG C B --> REPLACE BODY ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR C --> REPAIR OR REPLACE HARNESS OR CONNECTOR A --> REPLACE BODY ECU
  1. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND) Disconnect the D39 ECU connector. Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition D39-1 (+B1) - Body ground Always 10 to 14 V Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition D39-17 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the D13, D39 and D44 ECU connectors. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition D39-27 (MPX1) - D13-7 (MPX2) Always Below 1 ohms D39-28 (MPX2) - D44-7 (MPX1) Below 1 ohms Result Result Proceed to Both are OK A One is OK B Both are NG C B --> REPLACE CERTIFICATION ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR C --> REPAIR OR REPLACE HARNESS OR CONNECTOR A --> REPLACE CERTIFICATION ECU
  1. CHECK HARNESS AND CONNECTOR (MEMORY MIRROR ECU - BATTERY AND BODY GROUND) Disconnect the G1 ECU connector. Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Connection G1-4 (CPUB) - Body ground Always 10 to 14 V Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Connection G1-1 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the G1 and E30 ECU connectors. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Connection G1-8 (MPX1) - E30-33 (MPX+) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MEMORY MIRROR ECU
  1. CHECK HARNESS AND CONNECTOR (MEMORY MIRROR ECU - BATTERY AND BODY GROUND) Disconnect the H1 ECU connector. Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Connection H1-4 (CPUB) - Body ground Always 10 to 14 V Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Connection H1-1 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the H1 and E30 ECU connectors. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Connection H1-8 (MPX1) - E30-33 (MPX+) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE MEMORY MIRROR ECU
  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND) Disconnect the D44 ECU connector. Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition D44-33 (AM1) - Body ground Always 10 to 14 V D44-12 (AM2) - Body ground 10 to 14 V Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition D44-6 (GND2) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the D44, D37 and D39 ECU connectors. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition D44-7 (MPX1) - D39-28 (MPX2) Always Below 1 ohms D44-24 (MPX2) - D37-30 (MPX+) Below 1 ohms Result Result Proceed to Both are OK A One is OK B Both are NG C B --> REPLACE POWER SOURCE CONTROL ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR C --> REPAIR OR REPLACE HARNESS OR CONNECTOR A --> REPLACE POWER SOURCE CONTROL ECU
  1. CHECK HARNESS AND CONNECTOR (BODY ECU - AIRBAG SENSOR ASSEMBLY) Disconnect connector "D23" of the airbag sensor assembly and connector "IE" of the body ECU. Check for an open or short circuit in the harness and connector between the airbag sensor assembly and body ECU. OK There is no open or short circuit in the wire harness. NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. INSPECT BODY ECU Check that DTC B1243 is indicated when another body ECU in good condition is installed. Check if DTC B1243 is indicated after replacing the body ECU. OK DTCs B1243 is not indicated. NG --> REPLACE AIRBAG SENSOR ASSEMBLY OK --> REPLACE BODY ECU (ORIGINAL BODY ECU IS FAILURE)
  1. CHECK OPERATION Check for AVC-LAN communication DTCs. OK AVC-LAN communication DTCs are not output. NG --> GO TO «DIAGNOSTIC TROUBLE CODE CHART»(ref-428971-S25681593512011101200000) OF AUDIO SYSTEM OR NAVIGATION SYSTEM OK --> GO TO «PROBLEM SYMPTOMS TABLE»(ref-428971-S12246581602011101200000) OF AUDIO SYSTEM OR NAVIGATION SYSTEM
  1. CHECK HARNESS AND CONNECTOR (A/C ECU - BATTERY AND BODY GROUND) Disconnect the D37 ECU connector. Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition D37-21 (IG+) - Body ground Ignition switch off --> on (IG) 0 V --> 10 to 14 V D37-1 (B) - Body ground Always 10 to 14 V Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition D37-20 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the D37, E23, and D44 *1 or D13 *2 ECU connectors. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition D37-30 (MPX+) - D44-24 (MPX2) *1 Always Below 1 ohms D37-30 (MPX+) - D13-7 (MPX2) *2 Below 1 ohms D37-31 (MPX-) - E23-3 (MPD1) Below 1 ohms HINT: *1 : w/ Smart key system *2 : w/o Smart key system Result Result Proceed to Both are OK A One is OK B Both are NG C B --> REPLACE A/C ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR C --> REPAIR OR REPLACE HARNESS OR CONNECTOR A --> REPLACE A/C ECU
  1. CHECK WIRE HARNESS (COMBINATION METER ECU - BATTERY AND BODY GROUND) Disconnect the E30 meter connector. Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition E30-1 (B2) - Body ground Always 10 to 14 V E30-21 (B) - Body ground 10 to 14 V Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition E30-39 (ES) - Body ground Always Below 1 ohms E30-40 (E2) - Body ground Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the E30, E23 and 1G ECU connectors. Measure the resistance according to the value(s) in the table below. Resistance Tester Condition Condition Specified Condition E30-13 (MPX-) - E23-12 (MPD2) Always Below 1 ohms E30-33 (MPX+) - 1G-7 Below 1 ohms Result Result Proceed to Both are OK A One is OK B Both are NG C B --> REPLACE COMBINATION METER ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR C --> REPAIR OR REPLACE HARNESS OR CONNECTOR A --> REPLACE COMBINATION METER ECU
  1. CHECK HARNESS AND CONNECTOR (POWER SEAT ECU - BATTERY AND BODY GROUND) Disconnect the P13 and P14 ECU connectors. Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition P13-8 (SYSB) - Body ground Always 10 to 14 V P14-5 (+B) - Body ground 10 to 14 V Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition P14-1 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the P13 and G1 ECU connectors. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition P13-1 (MPX1) - G1-8 (MPX1) Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE POWER SEAT ECU
  1. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the D16, D7 and IR connectors. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition D16-1 (MPX+) - IR-9 Always Below 1 ohms D16-2 (GBSI) - D7-14 (GBS) Below 1 ohms Result Result Proceed to Both are OK A One is OK B Both are NG C B --> REPLACE OPTION CONNECTOR AND REPAIR OR REPLACE HARNESS OR CONNECTOR C --> REPAIR OR REPLACE HARNESS OR CONNECTOR A --> REPLACE OPTION CONNECTOR
  1. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH - BATTERY AND BODY GROUND) Disconnect the D13 combination switch connector. Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition D13-1 (B) - Body ground Always 10 to 14 V D13-2 (IG) - Body ground Ignition switch off--> on (IG) 0 V --> 10 to 14 V Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition D13-5 (E) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the D13, D6, and D39 *1 or D37 *2 ECU connectors. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition D13-6 (MPX1) - D6-21 (MPX2) Always Below 1 ohms D13-7 (MPX2) - D39-27 (MPX1) *1 Below 1 ohms D13-7 (MPX2) - D37-30 (MPX+) *2 Below 1 ohms HINT: *1 : w/ Smart key system *2 : w/o Smart key system Result Result Proceed to Both are OK A One is OK B Both are NG C B --> REPLACE COMBINATION SWITCH AND REPAIR OR REPLACE HARNESS OR CONNECTOR C --> REPAIR OR REPLACE HARNESS OR CONNECTOR A --> REPLACE COMBINATION SWITCH
  1. CHECK WIRE HARNESS (RAIN SENSOR - BATTERY AND BODY GROUND) Disconnect the N3 sensor connector. Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition N3-1 (SIG) - Body ground Ignition Switch On (IG) 10 to 14 V Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition N3-3 (ES) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the N3 and IR ECU connectors. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition N3-2 (MPX) - IR-9 Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE RAIN SENSOR
  1. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - BATTERY AND BODY GROUND) Disconnect the 1F and 1H front controller connectors. Measure the voltage according to the value(s) in the table below. Voltage Tester Connection Condition Specified Condition 1F-1 (+B) - Body ground Always 10 to 14 V Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition 1H-2 (GND) - Body ground Always Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  2. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the 1G, IR and E30 connectors. Measure the resistance according to the value(s) in the table below. Resistance Tester Connection Condition Specified Condition 1G-7 (MPX) - E30-33 (MPX+) Always Below 1 ohms 1G-8 (MPX) - IR-9 (MPX1) Below 1 ohms NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> REPLACE FRONT CONTROLLER

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