Automobile Training 46 CAN communication

Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication Automobile Training 46 CAN communication

CAN COMMUNICATION – CAN COMMUNICATION SYSTEM CA–1 CAN COMMUNICATION SYSTEM PRECAUTION F045104 PRECAUTION (a) Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire (b) After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation (c) Before measuring the resistance, leave the vehicle as is for at least minute and not operate the ignition switch, any other switches or the doors If doors need to be opened in order to check connectors, open the doors and leave them open HINT: Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation STEERING SYSTEM HANDLING PRECAUTIONS (a) Care must be taken when replacing parts Incorrect replacement could affect the performance of the steering system and result in hazards when driving SRS AIRBAG SYSTEM HANDLING PRECAUTIONS (a) This vehicle is equipped with an SRS (Supplemental Restraint System) such as the driver airbag and front passenger airbag Failure to carry out service operations in the correct sequence could cause unexpected SRS deployment during servicing and may lead to a serious accident Before servicing (including removal or installation of parts, inspection or replacement), be sure to read the precautionary notice for the Supplemental Restraint System (See page RS-1) BUS LINE REPAIR (a) After repairing the bus line with solder, wrap the repaired part with vinyl tape (See page IN-34) NOTICE: • The CANL bus line and CANH bus line must always be installed together • When installing, twist them together • CAN bus lines are likely to be influenced by noise if the bus lines are not twisted together • The difference in length between the CANL bus line and CANH bus line should be less than 100 mm (3.937 in.) • Leave approximately 80 mm (3.150 in.) loose in the twisted wires around the connectors CA CA–2 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM (b) Do not use bypass wiring between the connectors NOTICE: The feature of the twisted wire harness will be lost if bypass wiring is used Bypass Wire F045105E01 CONNECTOR HANDLING (a) When inserting tester probes into a connector, insert them from the rear of the connector Tester Probe F045106E04 (b) Use a repair wire to check the connector if it is impossible to check resistance from the rear of the connector Repair Wire F045107E08 CA CAN COMMUNICATION – CAN COMMUNICATION SYSTEM CA–3 PARTS LOCATION HATCHBACK: ECM BRAKE ACTUATOR (SKID CONTROL ECU)* *: W/ ABS C126027E02 CA CA–4 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM SEDAN: ECM *: W/ ABS BRAKE ACTUATOR (SKID CONTROL ECU)* C139123E02 CA CAN COMMUNICATION – CAN COMMUNICATION SYSTEM CA–5 HATCHBACK: MAIN BODY ECU (INSTRUMENT PANEL J/B) POWER STEERING ECU COMBINATION METER ECU P-CAN J/C (JUNCTION CONNECTOR) DLC3 AIR CONDITIONING AMPLIFIER* CA D-CAN J/C (JUNCTION CONNECTOR) CENTER AIRBAG SENSOR ASSEMBLY *: W/ AIR CONDITIONING OR PTC HEATER C118152E03 CA–6 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM SEDAN: POWER STEERING ECU MAIN BODY ECU (INSTRUMENT PANEL J/B) COMBINATION METER ECU AIR CONDITIONING AMPLIFIER* DLC3 P-CAN J/C CA D-CAN J/C (JUNCTION CONNECTOR) (JUNCTION CONNECTOR) CENTER AIRBAG SENSOR ASSEMBLY *: W/ AIR CONDITIONING OR PTC HEATER C139125E02 CA–7 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM SYSTEM DIAGRAM *1: w/ ABS ECM *2: w/ Air Conditioning or PTC Heater D-CAN J/C Air Conditioning Amplifier*2 (Junction Connector) DLC3 Center Airbag Sensor Assembly Brake Actuator (Skid Control ECU)*1 Combination Meter ECU Main Body ECU P-CAN J/C (Junction Connector) Power Steering ECU CA : CAN Main Wire (CAN-L) : CAN Branch Wire (CAN-L) : CAN Main Wire (CAN-H) : CAN Branch Wire (CAN-H) C118153E12 HINT: The power steering ECU and center airbag sensor assembly use the CAN communication system to perform DTC communication instead of the conventional communication line (SIL) CA–8 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM SYSTEM DESCRIPTION CA BRIEF DESCRIPTION (a) The CAN (Control Area Network) is a serial data communication system for real time application It is a vehicle multiplex communication system which has a high communication speed (500 kbps) and the ability to detect malfunctions (b) By pairing the CANH and CANL bus lines, the CAN performs communication based on differential voltages (c) Many ECUs (sensors) installed on the vehicle operate by sharing information and communicating with each other (d) The CAN has two 120 Ω resistors which are necessary to communicate with the main wire DEFINITION OF TERMS (a) Main wire (1) The main wire is a wire harness between the two terminus circuits on the bus (communication line) This is the main bus in the CAN communication system (b) Branch wire (1) The branch wire is a wire harness which diverges from the main wire to an ECU or sensor (c) Terminus circuit (1) The terminus circuit is a circuit which converts the communication current of the CAN communication into the bus voltage It consists of a resistor and condenser Two terminus circuits are necessary on a bus (d) CAN J/C (1) The CAN J/C is a junction designed for CAN communication ECUs OR SENSORS WHICH COMMUNICATE VIA CAN COMMUNICATION SYSTEM (a) Brake actuator (Skid control ECU)*1 (b) Power steering ECU (c) ECM (d) Center airbag sensor assembly (e) Air conditioning amplifier*2 (f) Combination meter ECU (g) Main body ECU HINT: *1: w/ ABS *2: w/ Air conditioning or PTC heater DIAGNOSTIC CODES FOR CAN COMMUNICATION SYSTEM (a) DTCs for the CAN communication system are as follows: U0073, U0100, U0105, U0121, U0129 and B1499 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM CA–9 NOTES REGARDING TROUBLESHOOTING (a) Trouble in the CAN bus (communication line) can be checked through the DLC3 (except when there is a wire break other than in the branch wire of the DLC3) NOTICE: Do not connect the tester directly to the DLC3 connector Be sure to use a service wire (b) DTCs regarding the CAN communication system can be checked using the intelligent tester via the CAN VIM (c) The CAN communication system cannot detect trouble in the branch wire of the DLC3 even though the DLC3 is also connected to the CAN communication system CA CA–10 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING NOTICE: • DTCs for the CAN communication system are as follows: U0073, U0100, U0105, U0121, U0129 and B1499 • Refer to the troubleshooting section for each system if DTCs regarding the CAN communication system are not output • Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire • After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation • Before measuring the resistance, leave the vehicle as is for at least minute and not operate the ignition switch, any other switches or the doors If doors need to be opened in order to check connectors, open the doors and leave them open HINT: Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation CHECK CAN BUS LINE (a) Check the CAN bus line (See page CA-42) NEXT CHECK INSTALLED SYSTEMS (ECUs AND SENSORS) THAT ADOPT CAN COMMUNICATION NEXT CA CHECK AND CLEAR DTCs NEXT CHECK CAN COMMUNICATION USING INTELLIGENT TESTER VIA CAN VIM (a) Select "BUS CHECK" (See page CA-22) Result All ECUs and sensors connected to CAN communication system displayed on screen A One ECU or sensor connected to CAN communication system not displayed on screen B CA–92 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM (b) Measure the resistance HINT: The resistance must be measured after the D41 D-CAN J/C connector is disconnected Result Wire Harness Side: D-CAN J/C Connector EFI D41 EFI DLC3: CG D15 Tester Connection Condition Specified Condition Proceed to D41-4 (EFI) - D154 (CG) Ignition switch OFF Ω or higher OK D41-15 (EFI) D15-4 (CG) Ignition switch OFF Ω or higher OK D41-4 (EFI) - D154 (CG) Ignition switch OFF Below Ω NG D41-15 (EFI) D15-4 (CG) Ignition switch OFF Below Ω NG OK REPLACE ECM C133293E11 NG REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (D-CAN J/C - ECM (CAN-H, CANL)) 10 CHECK CAN BUS LINE FOR SHORT TO GND (BRAKE ACTUATOR (SKID CONTROL ECU) BRANCH WIRE) (a) Disconnect the A15 brake actuator (skid control ECU) connector Wire Harness Side: Brake Actuator (Skid Control ECU) Connector CA A15 Front View C118165E05 CA–93 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM (b) Measure the resistance HINT: The resistance must be measured after the D41 D-CAN J/C connector is disconnected Result Wire Harness Side: D-CAN J/C Connector ABS D41 ABS DLC3: CG D15 Tester Connection Condition Specified Condition Proceed to D41-1 (ABS) D15-4 (CG) Ignition switch OFF Ω or higher OK D41-12 (ABS) D15-4 (CG) Ignition switch OFF Ω or higher OK D41-1 (ABS) D15-4 (CG) Ignition switch OFF Below Ω NG D41-12 (ABS) D15-4 (CG) Ignition switch OFF Below Ω NG OK REPLACE BRAKE ACTUATOR (SKID CONTROL ECU) C133293E12 NG REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BRAKE ACTUATOR (D-CAN J/C BRAKE ACTUATOR (SKID CONTROL ECU) (CAN-H, CAN-L)) 11 CHECK CAN BUS LINE FOR SHORT TO GND (AIR CONDITIONING AMPLIFIER) (a) Disconnect the E8 air conditioning amplifier connector Wire Harness Side: Air Conditioning Amplifier Connector CA E8 C131847E04 CA–94 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM (b) Measure the resistance HINT: The resistance must be measured after the D41 D-CAN J/C connector is disconnected Result Wire Harness Side: D-CAN J/C Connector A/C D41 A/C DLC3: CG D15 Tester Connection Condition Specified Condition Proceed to D41-6 (A/C) D15-4 (CG) Ignition switch OFF Ω or higher OK D41-17 (A/C) D15-4 (CG) Ignition switch OFF Ω or higher OK D41-6 (A/C) D15-4 (CG) Ignition switch OFF Below Ω NG D41-17 (A/C) D15-4 (CG) Ignition switch OFF Below Ω NG OK REPLACE AIR CONDITIONING AMPLIFIER C133293E14 NG REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER (DCAN J/C - AIR CONDITIONING AMPLIFIER (CAN-H, CAN-L)) 12 CHECK CAN BUS LINE FOR SHORT TO GND (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE) (a) Disconnect the D16 center airbag sensor assembly connector Wire Harness Side: Center Airbag Sensor Assembly Connector CA D16 C131069E01 CA–95 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM (b) Measure the resistance HINT: The resistance must be measured after the D41 D-CAN J/C connector is disconnected Result Wire Harness Side: D-CAN J/C Connector A/B D41 A/B DLC3: CG D15 Tester Connection Condition Specified Condition Proceed to D41-8 (A/B) - D154 (CG) Ignition switch OFF Ω or higher OK D41-19 (A/B) D15-4 (CG) Ignition switch OFF Ω or higher OK D41-8 (A/B) - D154 (CG) Ignition switch OFF Below Ω NG D41-19 (A/B) D15-4 (CG) Ignition switch OFF Below Ω NG OK REPLACE CENTER AIRBAG SENSOR ASSEMBLY C133293E15 NG REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CENTER AIRBAG SENSOR ASSEMBLY (D-CAN J/C - CENTER AIRBAG SENSOR ASSEMBLY (CAN-H, CAN-L)) 13 CHECK CAN BUS LINE FOR SHORT TO GND (P-CAN J/C - POWER STEERING ECU) (a) Measure the resistance HINT: The resistance must be measured after the D42 P-CAN J/C connector is disconnected Result Wire Harness Side: P-CAN J/C Connector EPS D42 EPS DLC3: CG D15 Tester Connection Condition Specified Condition Proceed to D42-4 (EPS) D15-4 (CG) Ignition switch OFF Ω or higher OK D42-15 (EPS) D15-4 (CG) Ignition switch OFF Ω or higher OK D42-4 (EPS) D15-4 (CG) Ignition switch OFF Below Ω NG D42-15 (EPS) D15-4 (CG) Ignition switch OFF Below Ω NG NG C133293E16 Go to step 16 CA CA–96 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM OK 14 CHECK CAN BUS LINE FOR SHORT TO GND (P-CAN J/C - MAIN BODY ECU) (a) Measure the resistance HINT: The resistance must be measured after the D42 P-CAN J/C connector is disconnected Result Wire Harness Side: P-CAN J/C Connector J/B D42 J/B DLC3: CG D15 Tester Connection Condition Specified Condition Proceed to D42-5 (J/B) - D154 (CG) Ignition switch OFF Ω or higher OK D41-16 (J/B) D15-4 (CG) Ignition switch OFF Ω or higher OK D42-5 (J/B) - D154 (CG) Ignition switch OFF Below Ω NG D41-16 (J/B) D15-4 (CG) Ignition switch OFF Below Ω NG NG Go to step 17 C133293E17 OK 15 CHECK CAN BUS LINE FOR SHORT TO GND (P-CAN J/C - COMBINATION METER ECU) (a) Measure the resistance HINT: The resistance must be measured after the D42 P-CAN J/C connector is disconnected Result Wire Harness Side: P-CAN J/C Connector CA MET D42 MET DLC3: CG D15 Tester Connection Condition Specified Condition Proceed to D42-7 (MET) D15-4 (CG) Ignition switch OFF Ω or higher OK D41-18 (MET) D15-4 (CG) Ignition switch OFF Ω or higher OK D42-7 (MET) D15-4 (CG) Ignition switch OFF Below Ω NG D41-18 (MET) D15-4 (CG) Ignition switch OFF Below Ω NG NG C133293E20 Go to step 18 CA–97 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM OK REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (D-CAN J/C - P-CAN J/C (CAN-H, CANL)) 16 CHECK CAN BUS LINE FOR SHORT TO GND (POWER STEERING ECU MAIN WIRE) (a) Disconnect the D31 power steering ECU connector Wire Harness Side: Power Steering ECU Connector D31 G100242E11 (b) Measure the resistance HINT: The resistance must be measured after the D42 P-CAN J/C connector is disconnected Result Wire Harness Side: P-CAN J/C Connector EPS D42 EPS DLC3: CG D15 Tester Connection Condition Specified Condition Proceed to D42-4 (EPS) D15-4 (CG) Ignition switch OFF Ω or higher OK D42-15 (EPS) D15-4 (CG) Ignition switch OFF Ω or higher OK D42-4 (EPS) D15-4 (CG) Ignition switch OFF Below Ω NG D42-15 (EPS) D15-4 (CG) Ignition switch OFF Below Ω NG OK REPLACE POWER STEERING ECU C133293E16 NG REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER STEERING ECU (P-CAN J/C POWER STEERING ECU (CAN-H, CAN-L)) CA CA–98 17 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM CHECK CAN BUS LINE FOR SHORT TO GND (MAIN BODY ECU BRANCH WIRE) (a) Disconnect the D33 main body ECU connector Wire Harness Side: Main Body ECU Connector D33 C131840E02 (b) Measure the resistance HINT: The resistance must be measured after the D42 P-CAN J/C connector is disconnected Result Wire Harness Side: P-CAN J/C Connector J/B D42 J/B DLC3: CG D15 Tester Connection Condition Specified Condition Proceed to D42-5 (J/B) - D154 (CG) Ignition switch OFF Ω or higher OK D41-16 (J/B) D15-4 (CG) Ignition switch OFF Ω or higher OK D42-5 (J/B) - D154 (CG) Ignition switch OFF Below Ω NG D41-16 (J/B) D15-4 (CG) Ignition switch OFF Below Ω NG OK CA REPLACE MAIN BODY ECU C133293E17 NG REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (P-CAN J/C MAIN BODY ECU (CAN-H, CAN-L)) CA–99 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM 18 CHECK CAN BUS LINE FOR SHORT TO GND (COMBINATION METER ECU BRANCH WIRE) (a) Disconnect the D1 combination meter ECU connector Wire Harness Side: Combination Meter ECU Connector D1 Front View C139156E04 (b) Measure the resistance HINT: The resistance must be measured after the D42 P-CAN J/C connector is disconnected Result Wire Harness Side: P-CAN J/C Connector MET D42 MET DLC3: CG D15 Tester Connection Condition Specified Condition Proceed to D42-7 (MET) D15-4 (CG) Ignition switch OFF Ω or higher OK D41-18 (MET) D15-4 (CG) Ignition switch OFF Ω or higher OK D42-7 (MET) D15-4 (CG) Ignition switch OFF Below Ω NG D41-18 (MET) D15-4 (CG) Ignition switch OFF Below Ω NG OK REPLACE COMBINATION METER ECU CA C133293E20 NG REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO COMBINATION METER ECU (PCAN J/C - COMBINATION METER ECU (CAN-H, CAN-L)) CA–100 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM Open in One Side of CAN Branch Line DESCRIPTION If or more ECUs and/or sensors not appear on the intelligent tester "BUS CHECK" screen via the CAN VIM, one side of the CAN branch wire may be open (one side of the CAN-H [branch wire] / CANL [branch wire] of the ECU and/or sensor is open.) Symptom or more ECUs and/or sensors not appear on intelligent tester "BUS CHECK" screen via the CAN VIM HINT: • *1: w/ ABS • *2: w/ Air conditioning or PTC heater CA Trouble Area • • • • • • • • • • Open in one side of CAN branch wire Brake actuator (Skid control ECU)*1 Power steering ECU ECM Center airbag sensor assembly Air conditioning amplifier ECU*2 Combination meter ECU Main body ECU D-CAN J/C (Junction connector) P-CAN J/C (Junction connector) CA–101 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM WIRING DIAGRAM A21 ECM Brake Actuator (Skid Control ECU)*1 A15 12 41 49 15 D41 17 (Junction Connector) D1 20 21 18 13 19 22 D16 DLC3 P-CAN J/C Combination Meter ECU (Junction Connector) Center Airbag Sensor Assembly Air Conditioning Amplifier*2 E8 D-CAN J/C 11 22 11 22 14 14 D15 Main Body ECU D42 : CAN Main Wire (CAN-H) 15 : CAN Main Wire (CAN-L) : CAN Branch Wire (CAN-H) : CAN Branch Wire (CAN-L) 23 16 22 D33 CA *1: w/ ABS Power Steering ECU *2: w/ Air Conditioning or PTC Heater D31 C139178E02 CA–102 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM INSPECTION PROCEDURE NOTICE: • Turn the ignition switch OFF before measuring the resistances of the CAN main wire and the CAN branch wire • After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation • Before measuring the resistance, leave the vehicle as is for at least minute and not operate the ignition switch, any other switches or the doors If doors need to be opened in order to check connectors, open the doors and leave them open HINT: Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation HINT: • Perform the following inspection for the ECUs (sensors) which are not displayed on the intelligent tester If malfunction cannot be identified, then perform the following inspections for the ECUs (sensors) connected to CAN communication • Do not remove the power steering ECU and ECM, as they are the end parts of the circuit If removed, CAN communication will not be possible • The open circuit confirmation of the power steering ECU, ECM and main wire is performed in the CHECK CAN BUS LINE procedure of HOW TO PROCEED WITH TROUBLESHOOTING This inspection only has procedures for checking for an open circuit on one side of the CAN branch wire CHECK OPEN IN ONE SIDE OF CAN BRANCH WIRE (BRAKE ACTUATOR (SKID CONTROL ECU)) Wire Harness Side: Brake Actuator (Skid Control ECU) Connector NOTICE: For vehicles without ABS, go to step (a) Disconnect the A15 brake actuator (skid control ECU) connector (b) Select "BUS CHECK" on the intelligent tester via the CAN VIM (See page CA-22) Result Result A15 CA Front View A "ABS/VSC/TRAC" not displayed on intelligent tester A Several ECUs and sensors other than "ABS/VSC/TRAC" not displayed on intelligent tester B B C118165E05 Proceed to Go to step CA–103 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM CHECK OPEN IN ONE SIDE OF CAN BRANCH WIRE (BRAKE ACTUATOR (SKID CONTROL ECU) BRANCH WIRE) Wire Harness Side: Brake Actuator (Skid Control ECU) Connector CANL A15 CANH (a) Measure the resistance HINT: The resistance must be measured after the A15 brake actuator (skid control ECU) connector is disconnected Standard resistance Tester Connection Condition Specified Condition A15-6 (CANH) - A15-5 (CANL) Ignition switch OFF 54 to 69 Ω NG Front View REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BRAKE ACTUATOR (SKID CONTROL ECU) (CAN-H, CAN-L) C118165E03 OK REPLACE BRAKE ACTUATOR (SKID CONTROL ECU) CHECK OPEN IN ONE SIDE OF CAN BRANCH WIRE (AIR CONDITIONING AMPLIFIER) Wire Harness Side: Air Conditioning Amplifier Connector NOTICE: For vehicles without air conditioning or PTC heater, go to step (a) Disconnect the E8 air conditioning amplifier connector (b) Select "BUS CHECK" on the intelligent tester via the CAN VIM (See page CA-22) Result Result "A/C" not displayed on intelligent tester A Several ECUs and sensors other than "A/C" not displayed on intelligent tester B B E8 C131847E04 A Proceed to Go to step CA CA–104 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM CHECK OPEN IN ONE SIDE OF CAN BRANCH WIRE (AIR CONDITIONING AMPLIFIER BRANCH WIRE) Wire Harness Side: Air Conditioning Amplifier Connector (a) Measure the resistance HINT: The resistance must be measured after the E8 air conditioning amplifier connector is disconnected Standard resistance Tester Connection Condition Specified Condition E8-2 (TX+) - E8-3 (TX-) Ignition switch OFF 54 to 69 Ω NG REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER (CAN-H, CAN-L) TX+ TXE8 C131847E01 OK REPLACE AIR CONDITIONING AMPLIFIER CHECK OPEN IN ONE SIDE OF CAN BRANCH WIRE (CENTER AIRBAG SENSOR ASSEMBLY) Wire Harness Side: Center Airbag Sensor Assembly Connector (a) Disconnect the D16 center airbag sensor assembly connector (b) Select "BUS CHECK" on the intelligent tester via the CAN VIM (See page CA-22) Result Result D16 CA "SRS AIRBAG" not displayed on intelligent tester A Several ECUs and sensors other than "SRS AIRBAG" not displayed on intelligent tester B B C131069E01 A Proceed to Go to step CA–105 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM CHECK OPEN IN ONE SIDE OF CAN BRANCH WIRE (CENTER AIRBAG SENSOR ASSEMBLY BRANCH WIRE) Wire Harness Side: Center Airbag Sensor Assembly Connector (a) Measure the resistance HINT: The resistance must be measured after the D16 center airbag sensor assembly connector is disconnected Standard resistance Tester Connection Condition Specified Condition D16-13 (CANH) - D16-22 (CANL) Ignition switch OFF 54 to 69 Ω D16 NG CANH REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CENTER AIRBAG SENSOR ASSEMBLY (CAN-H, CAN-L) CANL C131069E06 OK REPLACE CENTER AIRBAG SENSOR ASSEMBLY CHECK OPEN IN ONE SIDE OF CAN BRANCH WIRE (MAIN BODY ECU) (a) Disconnect the D33 main body ECU connector (b) Select "BUS CHECK" on the intelligent tester via the CAN VIM (See page CA-22) Result Wire Harness Side: Main Body ECU Connector Result D33 A Several ECUs and sensors other than "MAIN BODY" not displayed on intelligent tester B B C131840E02 A Proceed to "MAIN BODY" not displayed on intelligent tester Go to step CA CA–106 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM CHECK OPEN IN ONE SIDE OF CAN BRANCH WIRE (MAIN BODY ECU BRANCH WIRE) (a) Measure the resistance HINT: The resistance must be measured after the D33 main body ECU connector is disconnected Standard resistance Wire Harness Side: Main Body ECU Connector D33 Tester Connection Condition Specified Condition D33-23 (CANH) - D33-22 (CANL) Ignition switch OFF 54 to 69 Ω NG CANH CANL REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (CAN-H, CAN-L) C131840E01 OK REPLACE MAIN BODY ECU CHECK OPEN IN ONE SIDE OF CAN BRANCH WIRE (COMBINATION METER ECU) (a) Disconnect the D1 combination meter ECU connector (b) Measure the resistance Standard resistance Wire Harness Side: Combination Meter ECU Connector CANH D1 CANL CA Front View C139156E02 OK REPLACE COMBINATION METER ECU Tester Connection Condition Specified Condition D1-20 (CANH) - D1-20 (CANL) Ignition switch OFF 54 to 69 Ω NG REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO COMBINATION METER ECU (CAN-H, CAN-L) ... the CAN communication system, CAN communication system DTCs output by the ECU can be displayed by using the intelligent tester CAN COMMUNICATION – CAN COMMUNICATION SYSTEM CA–25 • If CAN communication. .. (between P -CAN and D -CAN J/C) D42-11 (TOLH) Y CAN main wire (between P -CAN and D -CAN J/C) D42-22 (TOLH) W CA CA–16 CAN COMMUNICATION – CAN COMMUNICATION SYSTEM (b) Wiring diagram for identifying CAN. .. CA : CAN Main Wire (CAN- L) : CAN Branch Wire (CAN- L) : CAN Main Wire (CAN- H) : CAN Branch Wire (CAN- H) C118153E12 HINT: The power steering ECU and center airbag sensor assembly use the CAN communication