CAN Communication System (Diagnostics - Introduction): Other Lexus RX III

PRECAUTION

1. PRECAUTION FOR DISCONNECTING BATTERY CABLE NOTE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System See Procedure Power back door system Refer to «INITIALIZATION»(ref-400649-S34584305262011051800000)
2. PRECAUTIONS FOR STEERING SYSTEM HANDLING Be careful when replacing parts. Incorrect replacement could affect the performance of the steering system and result in hazardous driving.
3. PRECAUTIONS FOR SRS AIRBAG SYSTEM HANDLING This vehicle is equipped with an Supplemental Restraint System (SRS) which includes parts such as airbags for the driver and front passenger. Failure to carry out service operations in the correct sequence could cause unexpected SRS deployment during servicing and may cause a serious accident. Before servicing (including removal or installation of parts, inspection or replacement), be sure to read the precaution for the SRS. Refer to «PRECAUTION»(ref-400811-S15765720172011051800000) .
4. BUS WIRE REPAIR After repairing a bus wire with solder, wrap the repaired part with electrical tape. NOTE: The CANL bus wire and CANH bus wire must be installed together at all times. When installing, make sure that these wires are twisted, because CAN bus wires are likely to be influenced by electrical noise if the bus wires are not twisted. The difference in length between the CANL bus wire and CANH bus wire should be 100 mm (3.937 in.) or less. Leave approximately 80 mm (3.150 in.) loose in the twisted wires around the connector. Do not use bypass wiring between connectors. NOTE: The ability of the twisted bus wires to resist interference will be lost if bypass wiring is used.
5. CONNECTOR HANDLING When checking resistance with a tester, insert the tester probes from the backside (harness side) of the connector. Use service wires to check the connector if it is impossible to check continuity from the rear of the connector.
6. PRECAUTIONS FOR INSPECTING OR REPLACING CAN JUNCTION CONNECTOR If the CAN junction connector is removed from the vehicle for inspection or replacement, make sure to install the CAN junction connector and all wire harnesses to their original locations with tape and the clamps.

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1. CAN No. 1 BUS
2. CAN No. 2 BUS
3. CAN MS BUS
4. POWER MANAGEMENT BUS

TERMINALS OF ECU

Note. Turn the engine switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires. Turn the engine switch off before inspecting CAN bus wires for a ground short. After the engine switch is turned off, check that the key reminder warning system and light reminder warning system are not operating. Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the engine switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open. This service information describes the standard CAN values for all CAN related components.

HINT

1. Operating the engine switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
2. Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

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1. CAN NO. 1 JUNCTION CONNECTOR Check the CAN No. 1 junction connector. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to CAN No. 1 Junction Connector) *2 to Power Steering ECU *3 to Steering Angle Sensor *4 to DLC3 *5 to Combination Meter *6 to Main Body ECU *7 to ECM *8 to CAN No. 2 Junction Connector *9 to Power Management Control ECU *10 to Center Airbag Sensor Assembly *11 to Yaw Rate Sensor Check the connection diagram of the components which are connected to the CAN No. 1 junction connector. Terminal No. (Symbol) Wiring Color Connected to F70-1 (CANH) G Power steering ECU F70-12 (CANL) R F70-2 (CANH) BE Steering angle sensor F70-13 (CANL) R F70-3 (CANH) V DLC3 F70-14 (CANL) R F70-4 (CANH) P Combination meter F70-15 (CANL) R F70-5 (CANH) Y Main body ECU F70-16 (CANL) R F70-6 (CANH) GR ECM F70-17 (CANL) R F70-7 (CANH) B CAN No. 2 junction connector F70-18 (CANL) R F70-9 (CANH) LG Power management control ECU F70-20 (CANL) R F70-10 (CANH) R Center Airbag Sensor F70-21 (CANL) L F70-11 (CANH) BR Yaw rate sensor F70-22 (CANL) R
2. CAN NO. 2 JUNCTION CONNECTOR Check the CAN No. 2 junction connector. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to CAN No. 2 Junction Connector) *2 to Skid Control ECU *3 to Certification ECU *4 to CAN No. 1 Junction Connector *5 to Display and Navigation Module Display Check the connection diagram of the components which are connected to the CAN No. 2 junction connector. Terminal No. (Symbol) Wiring Color Connected to F71-1 (CANH) GR Skid control ECU F71-12 (CANL) R F71-2 (CANH) LG Certification ECU F71-13 (CANL) R F71-7 (CANH) B CAN No. 1 junction connector F71-18 (CANL) R F71-8 (CANH) SB Display and navigation module display F71-19 (CANL) R
3. CAN NO. 3 JUNCTION CONNECTOR Check the CAN No. 3 junction connector. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to CAN No. 3 Junction Connector) *2 to Power Management Control ECU *3 to Driving Support ECU *4 to AFS ECU *5 to CAN No. 4 Junction Connector Check the connection diagram of the components which are connected to the CAN No. 3 junction connector. Terminal No. (Symbol) Wiring Color Connected to F68-1 (CANH) G Power management control ECU F68-12 (CANL) L F68-2 (CANH) BE Driving support ECU F68-13 (CANL) L F68-3 (CANH) B AFS ECU F68-14 (CANL) L F68-4 (CANH) BR CAN No. 4 junction connector F68-15 (CANL) L
4. CAN NO. 4 JUNCTION CONNECTOR Check the CAN No. 4 junction connector. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to CAN No. 4 Junction Connector) *2 to 4WD Control ECU *3 to Air Suspension Control ECU *4 to Seat Belt Control ECU *5 to Parking Assist ECU (w/ Parking Assist Monitor system) to Clearance Warning ECU (w/ Intuitive Parking Assist system) *6 to CAN No. 5 Junction Connector *7 to CAN No. 3 Junction Connector Check the connection diagram of the components which are connected to the CAN No. 4 junction connector. Terminal No. (Symbol) Wiring Color Connected to F67-1 (CANH) LG 4WD control ECU F67-12 (CANL) L F67-2 (CANH) P Air Suspension Control ECU F67-13 (CANL) L F67-3 (CANH) V Seat Belt Control ECU F67-14 (CANL) L F67-4 (CANH) Y Parking assist ECU (w/ Parking assist monitor system) Clearance warning ECU (w/ Intuitive parking assist system) F67-15 (CANL) L F67-5 (CANH) GR CAN No. 5 junction connector F67-16 (CANL) L F67-6 (CANH) BR CAN No. 3 junction connector F67-17 (CANL) L
5. CAN NO. 5 JUNCTION CONNECTOR Check the CAN No. 5 junction connector. TEXT IN ILLUSTRATION *1 Rear view of wire harness connector (to CAN No. 5 Junction Connector) *2 to CAN No. 4 Junction Connector Check the connection diagram of the components which are connected to the CAN No. 5 junction connector. Terminal No. (Symbol) Wiring Color Connected to F69-3 (CANH) GR CAN No. 4 junction connector F69-2 (CANL) L
6. CAN NO. 6 JUNCTION CONNECTOR Check the CAN No. 6 junction connector. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to CAN No. 6 Junction Connector) Check the connection diagram of the components which are connected to the CAN No. 6 junction connector. Terminal No. (Symbol) Wiring Color Connected to F73-1 (CANH) GR Outer mirror control ECU RH F73-2 (CANL) W F74-1 (CANH) BR Multiplex tilt and telescopic ECU F74-2 (CANL) W F75-1 (CANH) G Position Control ECU F75-2 (CANL) W F76-1 (CANH) B Power back door ECU F76-2 (CANL) W F77-1 (CANH) LG Outer mirror control ECU LH F77-2 (CANL) W F78-1 (CANH) BE Main body ECU F78-2 (CANL) W
7. CAN NO. 7 JUNCTION CONNECTOR Check the CAN No. 7 junction connector. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to CAN No. 7 Junction Connector) *2 to Air Conditioning Amplifier *3 to Power Management Control ECU *4 to ECM Check the connection diagram of the components which are connected to the CAN No. 7 junction connector. Terminal No. (Symbol) Wiring Color Connected to F72-1 (CANH) B Air conditioning amplifier F72-12 (CANL) W F72-2 (CANH) V Power management control ECU F72-13 (CANL) W F72-3 (CANH) G ECM F72-14 (CANL) W
8. DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F17-6 (CANH) - F17-14 (CANL) V - R HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F17-6 (CANH) - F17-16 (BAT) V - LG HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F17-14 (CANL) - F17-16 (BAT) R - LG LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F17-6 (CANH) - F17-4 (CG) V - W-B HIGH-level CAN bus line - Chassis ground Engine switch off 200 ohms or higher F17-14 (CANL) - F17-4 (CG) R - W-B LOW-level CAN bus line - Chassis ground Engine switch off 200 ohms or higher TEXT IN ILLUSTRATION *1 DLC3
9. ECM Disconnect the connectors of the ECM. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to ECM) Measure the resistance according to the value(s) in the table below. Standard Resistance FOR CAN NO. 1 BUS MAIN WIRE Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A43-10 (CANH) - A43-11 (CANL) G - L HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 108 to 132 ohms A43-10 (CANH) - A43-1 (BATT) G - LG HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher A43-11 (CANL) - A43-1 (BATT) L - LG LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher A43-10 (CANH) - D1-81 (E1) G - BR HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher A43-11 (CANL) - D1-81 (E1) L - BR LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher FOR POWER MANAGEMENT BUS MAIN WIRE Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A43-8 (CANP) - A43-9 (CANN) B - W HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 108 to 132 ohms A43-8 (CANP) - A43-1 (BATT) B - LG HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher A43-9 (CANN) - A43-1 (BATT) W - LG LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher A43-8 (CANP) - D1-81 (E1) B - BR HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher A43-9 (CANN) - D1-81 (E1) W - BR LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
10. MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Disconnect the connectors of the main body ECU. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Main Body ECU) *2 DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance for CAN No. 1 Bus Branch Wire for CAN MS Bus Main Wire Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F13-14 (CANH) - F13-13 (CANL) Y - R HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F13-14 (CANH) - F17-16 (BAT) Y - LG HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F13-13 (CANL) - F17-16 (BAT) R - LG LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F13-14 (CANH) - F14-3 (GND2) Y - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F13-14 (CANL) - F14-3 (GND2) R - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F14-9 (CANP) - F14-10 (CANN) BE - W HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 108 to 132 ohms F14-9 (CANP) - F17-16 (BAT) BE - LG HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F14-10 (CANN) - F17-16 (BAT) W - LG LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F14-9 (CANP) - F14-3 (GND2) BE- W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F14-10 (CANN) - F14-3 (GND2) W - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
11. COMBINATION METER Disconnect the connector of the combination meter. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Combination Meter) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F16-23 (CANH) - F16-24 (CANL) P - R HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F16-23 (CANH) - F16-13 (B) P - SB HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F16-24 (CANL) - F16-13 (B) R - SB LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F16-23 (CANH) - F16-6 (ES) P - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F16-24 (CANL) - F16-6 (ES) R - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
12. POWER STEERING ECU Disconnect the connectors of the power steering ECU. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Power steering ECU) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F9-1 (CANH) - F10-7 (CANL) G - R HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F9-1 (CANH) - F10-1 (PIG) G - W HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F9-7 (CANL) - F10-1 (PIG) R - W LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F9-1 (CANH) - F10-2 (PGND) G - B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F9-7 (CANL) - F10-2 (PGND) R - B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
13. AIR CONDITIONING AMPLIFIER Disconnect the connector of the air conditioning amplifier. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Air Conditioning Amplifier) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F50-11 (CANH) - F50-12 (CANL) B - W HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F50-11 (CANH) - F50-21 (B) B - G HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F50-12 (CANL) - F50-21 (B) W - G LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F50-11 (CANH) - F50-14 (GND) B - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F50-12 (CANL) - F50-14 (GND) W - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
14. CENTER AIRBAG SENSOR ASSEMBLY Disconnect the connector of the center airbag sensor assembly. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Center Airbag Sensor Assembly) *2 DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F29-13 (CANH) - F29-22 (CANL) R- L HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F29-13 (CANH) - F17-16 (BAT) R - LG CAN communication line H - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F29-22 (CANL) - F17-16 (BAT) L - LG CAN communication line L - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F29-13 (CANH) - F29-25 (E1) R - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F29-22 (CANL) - F29-25 (E1) L - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
15. SKID CONTROL ECU (BRAKE ACTUATOR) Disconnect the connector of the brake actuator (skid control ECU). TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Skid Control ECU) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A44-25 (CANH) - A44-14 (CANL) G - L HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms A44-25 (CANH) - A44-12 (+BS) G - L HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher A44-14 (CANL) - A44-21 (+BS) L - L LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher A44-25 (CANH) - A44-1 (GND1) G - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher A44-14 (CANL) - A44-1 (GND1) L - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
16. STEERING ANGLE SENSOR Disconnect the connector of the steering angle sensor. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Steering Angle Sensor) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F43-4 (CANH) - F43-3 (CANL) BE - R HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F43-4 (CANH) - F43-6 (BAT) BE - SB HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F43-3 (CANL) - F43-6 (BAT) R - SB LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F43-4 (CANH) - F43-2 (ESS) BE - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F43-3 (CANL) - F43-2 (ESS) R - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
17. YAW RATE SENSOR Disconnect the connector of the yaw rate sensor. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Yaw Rate Sensor) *2 DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F28-3 (CANH) - F28-2 (CANL) BR - R HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F28-3 (CANH) - F17-16 (BAT) BR - LG HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F28-2 (CANL) - F17-16 (BAT) R - LG LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F28-3 (CANH) - F28-1 (GND) BR - BR HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F28-2 (CANL) - F28-1 (GND) R - BR LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
18. CERTIFICATION ECU (SMART KEY ECU) Disconnect the connector of the certification ECU. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Certification ECU) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F58-9 (CANH) -F58-10 (CANL) LG - R HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F58-9 (CANH) - F58-1 (+B) LG - LG HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F58-10 (CANL) - F58-1 (+B) R - LG LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F58-9 (CANH) - F58-15 (E) LG - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F58-10 (CANL) - F58-15 (E) R - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
19. NAVIGATION ECU (DISPLAY AND NAVIGATION MODULE DISPLAY) Disconnect the connector of the navigation ECU. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Display and Navigation Module Display) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition G4-21 (CANH) - G4-22 (CANL) L - R HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms G4-21 (CANH) - G4-1 (+B1) L - V HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher G4-22 (CANL) - G4-1 (+B1) R - V LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher G4-21 (CANH) - G4-10 (GND1) L - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher G4-22 (CANL) - G4-10 (GND1) R - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
20. POWER MANAGEMENT CONTROL ECU Disconnect the connector of the power management control ECU. TEXT IN ILLUSTRATION *1 Rear view of wire harness connector (to Power Management control ECU) Measure the resistance according to the value(s) in the table below. Standard Resistance for CAN No. 1 Bus Branch Wire for CAN No. 2 Bus Main Wire for Power Management Bus Main Wire Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F8-14 (CA1H) -F8-13 (CA1L) LG - R HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F8-14 (CA1H) - F8-1 (AM22) LG - SB HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F8-13 (CA1L) - F8-1 (AM22) R - SB LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F8-14 (CA1H) - F8-6 (GND) LG - BR HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F8-13 (CA1L) - F8-6 (GND) R - BR LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F8-26 (CA2H) -F8-25 (CA2L) G - L HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 108 to 132 ohms F8-26 (CA2H) - F8-1 (AM22) G - SB HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F8-25 (CA2L) - F8-1 (AM22) L - SB LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F8-26 (CA2H) - F8-6 (GND) G - BR HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F8-25 (CA2L) - F8-6 (GND) L - BR LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F8-12 (CA3P) -F8-11 (CA3N) V - W HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 108 to 132 ohms F8-12 (CA3P) - F8-1 (AM22) V - SB HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F8-11 (CA3N) - F8-1 (AM22) W - SB LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F8-12 (CA3P) - F8-6 (GND) V - BR HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F8-11 (CA3N) - F8-6 (GND) W - BR LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
21. AFS ECU (HEADLIGHT SWIVEL ECU) Disconnect the connector of the AFS ECU. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to AFS ECU) *2 DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A53-12 (CANH) - A53-13 (CANL) B - W HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms A53-12 (CANH) - F17-16 (BAT) B - LG HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher A53-13 (CANL) - F17-16 (BAT) W - LG LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher A53-12 (CANH) - A53-22 (E1) B - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher A53-13 (CANL) - A53-22 (E1) W - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
22. 4WD CONTROL ECU Disconnect the connector of the 4WD control ECU. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to 4WD Control ECU) *2 DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition O2-14 (CANH) - O2-16 (CANL) B - W HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms O2-14 (CANH) - F17-16 (BAT) B - LG HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher O2-16 (CANL) - F17-16 (BAT) W - LG LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher O2-14 (CANH) - O2-23 (GND) B - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher O2-16 (CANL) - O2-23 (GND) W - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
23. SUSPENSION CONTROL ECU Disconnect the connector of the suspension control ECU. TEXT IN ILLUSTRATION *1 Rear view of wire harness connector (to Suspension Control ECU) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A56-7 (CANH) - A56-8 (CANL) B - W HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms A56-7 (CANH) - A56-3 (BAT) B - Y HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher A56-8 (CANL) - A56-3 (BAT) W - Y LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher A56-7 (CANH) - A56-5 (GND) B - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher A56- 8 (CANL) - A56-5 (GND) W - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
24. SEAT BELT CONTROL ECU Disconnect the connectors of the seat belt control ECU. TEXT IN ILLUSTRATION *1 Rear view of wire harness connector (to Seat Belt Control ECU) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F56-1 (CANH) - F56-2 (CANL) V - L HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F56-1 (CANH) - F57-7 (+B) V - B HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F56-2 (CANL) - F57-7 (+B) L - B LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F56-1 (CANH) - F57-8 (PGND) V - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F56-2 (CANL) - F57-8 (PGND) L - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
25. DRIVING SUPPORT ECU Disconnect the connector of the driving support ECU. TEXT IN ILLUSTRATION *1 Rear view of wire harness connector (to Driving Support ECU) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition C1-39 (CA2H) - C1-17 (CA2L) B - W HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms C1-39 (CA2H) - C1-30 (B) B - P HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher C1-17 (CA2L) - C1-30 (B) W - P LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher C1-39 (CA2H) - C1-25 (GND) B - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher C1-17 (CA2L) - C1-25 (GND) W - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
26. PARKING ASSIST ECU Disconnect the connector of the parking assist ECU. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Parking Assist ECU) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F54-22 (CANH) - F54-21 (CANL) Y - L HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F54-22 (CANH) - F54-1 (+B) Y - R HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F54-21 (CANL) - F54-1 (+B) L - R LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F54-22 (CANH) - F54-3 (GND1) Y - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F54-21 (CANL) - F54-3 (GND1) L - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
27. CLEARANCE WARNING ECU Disconnect the connector of the clearance warning ECU. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Clearance Warning ECU) *2 DLC3 Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F52-3 (R1) - F52-5 (R2) Y - L HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F52-3 (R1) - F17-16 (BAT) Y - LG HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F52-5 (R2) - F17-16 (BAT) L - LG LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F52-3 (R1) - F52-17 (E) Y - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F52-5 (R2) - F52-17 (E) L - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
28. TILT AND TELESCOPIC ECU (MULTIPLEX TILT AND TELESCOPIC ECU) Disconnect the connector of the multiplex tilt and telescopic ECU. TEXT IN ILLUSTRATION *1 Rear view of wire harness connector (to Multiplex Tilt and Telescopic ECU) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition F36-5 (CANP) - F36-14 (CANN) BR - W HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms F36-5 (CANP) - F36-2 (+B) BR - Y HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F36-14 (CANN) - F36-2 (+B) W - Y LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher F36-5 (CANP) - F36-11 (GND) BR - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher F36-14 (CANN) - F36-11 (GND) W - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
29. OUTER MIRROR CONTROL ECU LH Disconnect the connector of the outer mirror control ECU LH. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Outer Mirror Control ECU LH) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition J3-9 (CANP) - J3-8 (CANN) LG - P HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms J3-9 (CANP) - J3-6 (CPUB) LG - L HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher J3-8 (CANN) - J3-6 (CPUB) P - L LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher J3-9 (CANP) - J3-7 (GND) LG - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher J3-8 (CANN) - J3-7 (GND) P - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
30. OUTER MIRROR CONTROL ECU RH Disconnect the connector of the outer mirror control ECU RH. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Outer Mirror Control ECU RH) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition I4-9 (CANP) - I4-8 (CANN) LG - P HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms I4-9 (CANP) - I4-6 (CPUB) LG - P HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher I4-8 (CANN) - I4-6 (CPUB) P - P LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher I4-9 (CANP) - I4-7 (GND) LG - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher I4-8 (CANN) - I4-7 (GND) P - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
31. POSITION CONTROL ECU LH Disconnect the connectors of the position control ECU LH. TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Position Control ECU LH) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition a8-8 (CANP) - a8-7 (CANN) G - R HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms a8-8 (CANP) - a9-6 (+B) G - LG HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher a8-7 (CANN) - a9-6 (+B) R - LG LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher a8-8 (CANP) - a9-1 (GND) G - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher a8-7 (CANN) - a9-1 (GND) R - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher
32. POWER BACK DOOR ECU (BACK DOOR MOTOR UNIT) Disconnect the connector of the power back door ECU (back door motor unit). TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Power Back Door ECU) Measure the resistance according to the value(s) in the table below. Standard Resistance Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition P33-6 (CANP) - P33-5 (CANN) B - W HIGH-level CAN bus line - LOW-level CAN bus line Engine switch off 54 to 69 ohms P33-6 (CANP) - P33-10 (ECUB) B - BR HIGH-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher P33-5 (CANN) - P33-10 (ECUB) W - BR LOW-level CAN bus line - Battery positive (+) Cable disconnected from negative (-) battery terminal 6 kohms or higher P33-6 (CANP) - P33-11 (GND) B - W-B HIGH-level CAN bus line - Ground Engine switch off 200 ohms or higher P33-5 (CANN) - P33-11 (GND) W - W-B LOW-level CAN bus line - Ground Engine switch off 200 ohms or higher

FAIL-SAFE CHART

1. FAIL-SAFE FUNCTION When communication fails in any of the CAN bus wires (communication wires), a fail-safe function(s) will operate. The fail-safe function that is specified for each system operates to prevent those systems from malfunctioning. Effects on each system when communication is impossible. (For further details, see the appropriate service information for each system.) Function (Function Description) Control Master System Related Fail-safe Operation DTC (Driver Detectable) ABS control (Controls driving force while ABS in operation) Skid control ECU ECM Yaw rate sensor ABS control is inoperative (ABS control gradually stops) U0073 U0100 U0124 (Warning and indicator lights come on) TRC control (Engine power control by VSC/TRC) Skid control ECU ECM Yaw rate sensor Steering angle sensor ABS/VSC control is inoperative (ABS/VSC control gradually stops) U0073 U0100 U0123 U0124 U0126 (Warning and indicator lights come on) VSC control (Controls driving force while VSC in operation) Skid control ECU ECM Yaw rate sensor Steering angle sensor ABS/VSC control is inoperative (ABS/VSC control gradually stops) U0073 U0100 U0123 U0124 U0126 (Warning and indicator lights come on) Electric power steering control (Speed of vehicle induction type torque control) Power steering ECU ECM Skid control ECU Depression of EPS assist (Deterioration of steering assist) U0100 U0129 (Warning light comes on) Air conditioning control (Air conditioning control is in cabin) Air conditioning amplifier ECM Combination meter Main body ECU Power steering ECU Air conditioning function and PTC heater function stop (99) U0100 U0131 U0142 U0155 (Air conditioning is inoperative) Four wheel drive control 4WD control ECU ECM Skid control ECU Yaw rate sensor Steering angle sensor Fixed torque distribution U0073 U0100 U0123 U0124 U0126 U0129 (Warning and indicator lights come on) Air suspension control Suspension control ECU ECM Skid control ECU Yaw rate sensor Height control is set to "normal mode" U0073 U0100 U0123 U0124 U0129 (Indicator light come on/ U0073 only) Headlight swivel/Leveling control (Headlight control) AFS ECU ECM Skid control ECU Steering angle sensor Main body ECU Swivel control stops (Leveling control remains on) U0100 U0101 U0126 U0129 U0142 (Indicator light come on) Entry function/Power door lock control Certification ECU Main Body ECU Unlock permitted U0327 U1002 (Wireless door lock cannot operate) Pre-collision system Seat belt control ECU ECM Skid control ECU Driving support ECU Pre-collision control is inoperative U0122 U0151 U1104 Parking assist monitor system Parking assist ECU ECM Skid control ECU Steering angle sensor Main body ECU Parking assist monitor will be inoperative U0073 U0100 U0126 U0129 U0142 Intuitive parking assist system Clearance warning ECU ECM Combination meter Main body ECU Clearance sonar will be inoperative U0101 U0155 U0142 (Clearance sonar is inoperative) Power back door Power back door ECU Main body ECU Power back door does not operate U0230 Outer mirror control Outer mirror control ECU LH Outer mirror control ECU RH Main body ECU Outer mirrors do not operate U0199 U0200 Power tilt and power telescopic steering column Multiplex tilt and telescopic ECU Position control ECU LH Main body ECU Driving position memory function stop Auto away/return function stop B2621 B2624 U0209 U1115