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LAN_LAN_SYSTEM(LAN 通讯).pdf

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LAN_LAN_SYSTEM LAN 通讯
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LAN LAN-1 ELECTRICAL & POWER CONTROL C D E F G H I J K L B SECTION LAN A O P N CONTENTS LAN SYSTEM CAN FUNDAMENTAL PRECAUTION ........................................... .... 3 PRECAUTIONS .............................................. ..... 3 Precaution for Trouble Diagnosis ........................ ......3 Precaution for Harness Repair ............................ ......3 FUNCTION DIAGNOSIS ........................... .... 4 CAN COMMUNICATION SYSTEM ................ ..... 4 System Description ............................................. ......4 System Diagram .................................................. ......4 CAN Communication Control Circuit ................... ......5 DIAG ON CAN ................................................ ..... 6 Description .......................................................... ......6 System Diagram .................................................. ......6 TROUBLE DIAGNOSIS ................................. ..... 7 Condition of Error Detection ................................ ......7 Symptom When Error Occurs in CAN Communi- cation System ...................................................... ......7 Self-Diagnosis ..................................................... ....10 CAN Diagnostic Support Monitor ........................ ....10 BASIC INSPECTION ................................ ...13 DIAGNOSIS AND REPAIR WORKFLOW ..... ....13 Information Needed for Trouble Diagnosis ......... ....13 How to Use CAN Communication Signal Chart .. ....13 Trouble Diagnosis Flow Chart ............................. ....14 Trouble Diagnosis Procedure .............................. ....14 CAN HOW TO USE THIS MANUAL .................. ...36 HOW TO USE THIS SECTION ....................... ....36 Caution ................................................................ ....36 Abbreviation List .................................................. ....36 PRECAUTION ........................................... ...37 PRECAUTIONS .................................................37 Precaution for Supplemental Restraint System (SRS) “AIR BAG“ and “SEAT BELT PRE-TEN- SIONER“ ............................................................. ....37 Precautions for Trouble Diagnosis ...................... ....37 Precautions for Harness Repair .......................... ....37 BASIC INSPECTION ................................ ...39 DIAGNOSIS AND REPAIR WORKFLOW ........39 Interview Sheet .................................................... ....39 Diagnosis Sheet (CAN Type 1) ........................... ....40 Diagnosis Sheet (CAN Type 2) ........................... ....41 Diagnosis Sheet (CAN Type 3) ........................... ....42 Diagnosis Sheet (CAN Type 4) ........................... ....43 Diagnosis Sheet (CAN Type 5) ........................... ....44 Diagnosis Sheet (CAN Type 6) ........................... ....45 Diagnosis Sheet (CAN Type 7) ........................... ....46 Diagnosis Sheet (CAN Type 8) ........................... ....47 Diagnosis Sheet (CAN Type 9) ........................... ....48 Diagnosis Sheet (CAN Type 10) ......................... ....49 Diagnosis Sheet (CAN Type 11) ......................... ....50 Diagnosis Sheet (CAN Type 12) ......................... ....51 Diagnosis Sheet (CAN Type 13) ......................... ....52 Diagnosis Sheet (CAN Type 14) ......................... ....53 Diagnosis Sheet (CAN Type 15) ......................... ....54 Diagnosis Sheet (CAN Type 16) ......................... ....55 FUNCTION DIAGNOSIS ........................... ...56 CAN COMMUNICATION SYSTEM ...................56 CAN System Specification Chart ......................... ....56 CAN Communication Signal Chart ...................... ....57 TROUBLE DIAGNOSIS ....................................60 CAN Diagnostic Support Monitor ......................... ....60 DTC Index ........................................................... ....64 COMPONENT DIAGNOSIS ...................... ...65 CAN COMMUNICATION SYSTEM ...................65 Component Parts Location .................................. ....65LAN-2 Wiring Diagram - CAN SYSTEM - ....................... ... 66 MALFUNCTION AREA CHART ..................... ... 72 Main Line ............................................................. ... 72 Branch Line ......................................................... ... 72 Short Circuit ......................................................... ... 72 MAIN LINE BETWEEN TCM AND DLC CIR- CUIT ................................................................ ... 73 Diagnosis Procedure ........................................... ... 73 MAIN LINE BETWEEN TCM AND I-KEY CIR- CUIT ................................................................ ... 75 Diagnosis Procedure ........................................... ... 75 MAIN LINE BETWEEN I-KEY AND DLC CIR- CUIT ................................................................ ... 77 Diagnosis Procedure ........................................... ... 77 MAIN LINE BETWEEN DLC AND ABS CIR- CUIT ................................................................ ... 78 Diagnosis Procedure ........................................... ... 78 ECM BRANCH LINE CIRCUIT ....................... ... 79 Diagnosis Procedure ........................................... ... 79 TCM BRANCH LINE CIRCUIT ....................... ... 80 Diagnosis Procedure ........................................... ... 80 I-KEY BRANCH LINE CIRCUIT ..................... ... 81 Diagnosis Procedure ........................................... ... 81 4WD BRANCH LINE CIRCUIT ....................... ... 82 Diagnosis Procedure ............................................ ... 82 ADP BRANCH LINE CIRCUIT ....................... ... 83 Diagnosis Procedure ............................................ ... 83 AV BRANCH LINE CIRCUIT .......................... ... 84 Diagnosis Procedure ............................................ ... 84 BCM BRANCH LINE CIRCUIT ....................... ... 85 Diagnosis Procedure ............................................ ... 85 DLC BRANCH LINE CIRCUIT ....................... ... 86 Diagnosis Procedure ............................................ ... 86 HVAC BRANCH LINE CIRCUIT ..................... ... 87 Diagnosis Procedure ............................................ ... 87 M&A BRANCH LINE CIRCUIT ....................... ... 88 Diagnosis Procedure ............................................ ... 88 STRG BRANCH LINE CIRCUIT ..................... ... 89 Diagnosis Procedure ............................................ ... 89 ABS BRANCH LINE CIRCUIT ....................... ... 90 Diagnosis Procedure ............................................ ... 90 IPDM-E BRANCH LINE CIRCUIT .................. ... 91 Diagnosis Procedure ............................................ ... 91 CAN COMMUNICATION CIRCUIT ................ ... 92 Diagnosis Procedure ............................................ ... 92LAN PRECAUTIONS LAN-3[CAN FUNDAMENTAL] C D E F G H I J K L B A O P N PRECAUTION PRECAUTIONS Precaution for Trouble Diagnosis INFOID:0000000001348713 CAUTION: ? Never apply 7.0 V or more to the measurement terminal.  Use a tester with open terminal voltage of 7.0 V or less.  Turn the ignition switch OFF and disconnect the battery cable from the negative terminal when checking the harness. Precaution for Harness Repair INFOID:0000000001348714 ? Solder the repaired area and wrap tape around the soldered area. NOTE: A fray of twisted lines must be within 110 mm (4.33 in).  Bypass connection is never allowed at the repaired area. NOTE: Bypass connection may cause CAN communication error. The spliced wire becomes separated and the characteristics of twisted line are lost.  Replace the applicable harness as an assembly if error is detected on the shield lines of CAN communica- tion line. SKIB8766E SKIB8767ELAN-4[CAN FUNDAMENTAL] CAN COMMUNICATION SYSTEM FUNCTION DIAGNOSIS CAN COMMUNICATION SYSTEM System Description INFOID:0000000001348715  CAN communication is a multiplex communication system. This enables the system to transmit and receive large quantities of data at high speed by connecting control units with two communication lines (CAN-H and CAN-L).  Control units on the CAN network transmit signals using the CAN communication control circuit. They receive only necessary signals from other control units to operate various functions.  CAN communication lines adopt twisted-pair line style (two lines twisted) for noise immunity. System Diagram INFOID:0000000001348716 Each control unit passes an electric current to the termination circuits when transmitting CAN communication signal. The termination circuits produce an electrical potential difference between CAN-H and CAN-L. CAN communication system transmits and receives CAN communication signals by the potential difference. SKIB8887E Component Description Main line CAN communication line between splices Branch line CAN communication line between splice and a control unit Splice A point connecting a branch line with a main line Termination circuit Refer to LAN-5, “CAN Communication Control Circuit“.LAN CAN COMMUNICATION SYSTEM LAN-5[CAN FUNDAMENTAL] C D E F G H I J K L B A O P N CAN Communication Control Circuit INFOID:0000000001348717 *: These are the only control units wired with both ends of CAN communication system. SKIB8713E Component System description CAN controller It controls CAN communication signal transmission and reception, error detection, etc. Transceiver IC It converts digital signal into CAN communication signal, and CAN communication signal into digital signal. Noise filter It eliminates noise of CAN communication signal. Termination circuit * (Resistance of approx. 120 ? ) It produces potential difference.LAN-6[CAN FUNDAMENTAL] DIAG ON CAN DIAG ON CAN Description INFOID:0000000001348718 “Diag on CAN” is a diagnosis using CAN communication instead of previous DDL1 and DDL2 communication lines, between control units and diagnosis unit. System Diagram INFOID:0000000001348719 SKIB8714E Name Harness Description DDL1 Tx Rx It is used for trouble diagnosis. (CAN-H and CAN-L are used for controlling) DDL2 K-LINE It is used for trouble diagnosis. (CAN-H and CAN-L are used for controlling) Diag on CAN CAN-H CAN-L It is used for trouble diagnosis and control.LAN TROUBLE DIAGNOSIS LAN-7[CAN FUNDAMENTAL] C D E F G H I J K L B A O P N TROUBLE DIAGNOSIS Condition of Error Detection INFOID:0000000001348720 “U1000” or “U1001” is indicated on SELF-DIAG RESULTS on CONSULT-III if CAN communication signal is not transmitted or received between units for 2 seconds or more. CAN COMMUNICATION SYSTEM ERROR  CAN communication line open (CAN-H, CAN-L, or both)  CAN communication line short (ground, between CAN communication lines, other harnesses)  Error of CAN communication control circuit of the unit connected to CAN communication line WHEN “U1000” OR “U1001” IS INDICATED EVEN THOUGH CAN COMMUNICATION SYSTEM IS NORMAL  Removal/installation of parts: Error may be detected when removing and installing CAN communication unit and related parts while turning the ignition switch ON. (A DTC except for CAN communication may be detected.)  Fuse blown out (removed): CAN communication of the unit may cease.  Voltage drop: Error may be detected if voltage drops due to discharged battery when turning the ignition switch ON (Depending on the control unit which carries out CAN communication).  Error may be detected if the power supply circuit of the control unit, which carries out CAN communication, malfunctions (Depending on the control unit which carries out CAN communication).  Error may be detected if reprogramming is not completed normally. NOTE: CAN communication system is normal if “U1000” or “U1001” is indicated on SELF-DIAG RESULTS of CON- SULT-III under the above conditions. Erase the memory of the self-diagnosis of each unit. Symptom When Error Occurs in CAN Communication System INFOID:0000000001348721 In CAN communication system, multiple units mutually transmit and receive signals. Each unit cannot transmit and receive signals if any error occurs on CAN communication line. Under this condition, multiple control units related to the root cause malfunction or go into fail-safe mode. ERROR EXAMPLE NOTE:  Each vehicle differs in symptom of each unit under fail-safe mode and CAN communication line wiring.  Refer to LAN-36, “Abbreviation List“ for the unit abbreviation. Example: TCM branch line open circuit SKIB8738E Unit name Symptom ECM Engine torque limiting is affected, and shift harshness increases. BCM Reverse warning chime does not sound.LAN-8[CAN FUNDAMENTAL] TROUBLE DIAGNOSIS Example: Data link connector branch line open circuit NOTE:  When data link connector branch line is open, transmission and reception of CAN communication signals are not affected. Therefore, no symptoms occur. However, be sure to repair malfunctioning circuit.  When data link connector branch line is open, “ECU list” displayed on the CONSULT-III “CAN DIAG SUP- PORT MNTR” may be the same as when the CAN communication line has short-circuit. However, symp- toms differ depending on the case. See below chart for the differences. EPS control unit Normal operation. Combination meter  Shift position indicator and OD OFF indicator turn OFF.  Warning lamps turn ON. ABS actuator and electric unit (control unit) Normal operation. TCM No impact on operation. IPDM E/R Normal operation. Unit name Symptom SKIB8739E Unit name Symptom ECM Normal operation. BCM EPS control unit Combination meter ABS actuator and electric unit (control unit) TCM IPDM E/R “ECU list” on the “CAN DIAG SUPPORT MNTR” (CONSULT-III) Difference of symptom Data link connector branch line open circuit All Diag on CAN units are not indicated. Normal operation. CAN-H, CAN-L harness short-circuit Most of the units which are connected to the CAN communication system enter fail-safe mode or are deactivated.LAN TROUBLE DIAGNOSIS LAN-9[CAN FUNDAMENTAL] C D E F G H I J K L B A O P N Example: Main Line Between Data Link Connector and ABS Actuator and Electric Unit (Control Unit) Open Circuit Example: CAN-H, CAN-L Harness Short Circuit SKIB8740E Unit name Symptom ECM Engine torque limiting is affected, and shift harshness increases. BCM  Reverse warning chime does not sound.  The front wiper moves under continuous operation mode even though the front wip- er switch being in the intermittent position. EPS control unit The steering effort increases. Combination meter  The shift position indicator and OD OFF indicator turn OFF.  The speedometer is inoperative.  The odo/trip meter stops. ABS actuator and electric unit (control unit) Normal operation. TCM No impact on operation. IPDM E/R When the ignition switch is ON,  The headlamps (Lo) turn ON.  The cooling fan continues to rotate. SKIB8741E
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