CAN COMMUNICATION SYSTEM(for LHD), Diagnostic DTC:U1002

DESCRIPTION

• The network gateway ECU stores this DTC when no signals can be received from the ECUs that have been memorized as those connected to the sub bus 2.

• When the network gateway ECU receives a response signal from the ECUs connected to the sub bus 2, the network gateway ECU recognizes and memorizes that the ECU is connected to the sub bus 2. Based on this memorized data, the network gateway ECU monitors for malfunctions in the ECUs connected to the sub bus 2 when communicating with those ECUs. If the network gateway ECU cannot receive response signals from the ECUs that have been memorized as those connected to the sub bus 2, the network gateway ECU determines that a malfunction exists.

• If 2 or more DTCs are output during the DTC check, one side of the CAN branch wire may be open (one side of the CANH [CAN branch wire]/CANL [CAN branch wire] of the ECU and/or sensor is open).

• *1: w/ LEXUS Parking Assist-sensor System

• *2: w/ Pre-crash Safety System

• *3: w/ Lane Departure Alert System

• *4: w/ Panoramic View Monitor System

• *5: w/ Telematics Transceiver

• *6: w/ Bus Buffer ECU

• *7: w/ Blind Spot Monitor System

• *8: w/ Adaptive Variable Suspension System

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK SUB BUS 2

   
   
   1. 

      *a	Component with harness connected (Network Gateway ECU)

      Disconnect the cable from the negative (-) battery terminal.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Resistance: Malfunction I67-13 (CA2H) - I67-12 (CA2L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Below 53 Ω: Short in CAN bus wire I67-13 (CA2H) - I67-12 (CA2L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Higher than 70 Ω: Open in CAN main wire I67-13 (CA2H) - I67-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: +B short I67-12 (CA2L) - I67-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: +B short I67-13 (CA2H) - I67-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: Ground short I67-12 (CA2L) - I67-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: Ground short

      Result
      Result Proceed to OK A NG - Open in CAN main wire B NG - Short in CAN bus wire C NG - +B short - Ground short D

   
   

   B

   CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 CAN JUNCTION CONNECTOR) Click here

   C

   CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 CAN JUNCTION CONNECTOR) Click here

   D

   CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 CAN JUNCTION CONNECTOR) Click here

   A

2. CHECK HARNESS AND CONNECTOR (NETWORK GATEWAY ECU - BATTERY AND BODY GROUND)

   
   
   1. 

      *a	Front view of wire harness connector (to Network Gateway ECU)

      Reconnect the cable to the negative (-) battery terminal.

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

      Click here

   2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition I67-2 (BATT) - Body ground Always 11 to 14 V I67-9 (IG2) - Body ground Engine switch on (IG) 11 to 14 V

   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition I67-4 (GND) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK HARNESS AND CONNECTOR (NETWORK GATEWAY ECU - BATTERY)

   
   
   1. 

      *a	Front view of wire harness connector (to Network Gateway ECU)

      Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      w/o Stop and Start System Tester Connection Switch Condition Specified Condition I67-10 (IG1) - Body ground Engine switch on (IG) 11 to 14 V
      w/ Stop and Start System Tester Connection Switch Condition Specified Condition I67-10 (IG1) - Body ground Engine switch on (IG) 10.5 to 16 V

      Result
      Result Proceed to OK A NG (w/o Stop and Start System) B NG (w/ Stop and Start System) C

   
   

   A

   REPLACE NETWORK GATEWAY ECU Click here

   B

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   C

4. CHECK HARNESS AND CONNECTOR (NETWORK GATEWAY ECU - ENGINE STOP AND START ECU)

   
   

   1. Disconnect the I57 engine stop and start ECU connector.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition I67-10 (IG1) - I57-12 (IGO1) Always Below 1 Ω I67-10 (IG1) or I57-12 (IGO1) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   GO TO STOP AND START SYSTEM Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

5. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 CAN JUNCTION CONNECTOR)

   
   

   1. Disconnect the No. 3 CAN junction connector.

      

      *a	Front view of wire harness connector (to No. 3 CAN Junction Connector)	*b	to Network Gateway ECU
      *c	to No. 6 CAN Junction Connector	-	-

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition I95-4 (CANH) - I95-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω I95-10 (CANH) - I95-20 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result
      Result Proceed to OK A NG (to network gateway ECU CAN main wire) B NG (to No. 6 CAN junction connector CAN main wire) C

   
   

   A

   REPLACE NO. 3 CAN JUNCTION CONNECTOR

   C

   CONNECT CONNECTOR Click here

   B

6. CONNECT CONNECTOR

   
   

   1. Reconnect the No. 3 CAN junction connector.

      Result
      Proceed to NEXT

   
   

   NEXT

7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NETWORK GATEWAY ECU)

   
   
   1. 

      *a	Rear view of wire harness connector (to Network Gateway ECU)

      Disconnect the network gateway ECU connector.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition I67-13 (CA2H) - I67-12 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE NETWORK GATEWAY ECU Click here

   NG

   REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NETWORK GATEWAY ECU - NO. 3 CAN JUNCTION CONNECTOR)

8. CONNECT CONNECTOR

   
   

   1. Reconnect the No. 3 CAN junction connector.

      Result
      Proceed to NEXT

   
   

   NEXT

9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 6 CAN JUNCTION CONNECTOR)

   
   

   1. Disconnect the No. 6 CAN junction connector.

      

      *a	Front view of wire harness connector (to No. 6 CAN Junction Connector)	*b	to No. 1 CAN Junction Terminal
      *c	to No. 3 CAN Junction Connector	-	-

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Q32-4 (CANH) - Q32-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Q32-5 (CANH) - Q32-15 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result
      Result Proceed to OK A NG (to No. 1 CAN junction terminal CAN main wire) B NG (to No. 3 CAN junction connector CAN main wire) C

   
   

   A

   REPLACE NO. 6 CAN JUNCTION CONNECTOR

   C

   REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 3 CAN JUNCTION CONNECTOR)

   B

10. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 6 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

11. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 CAN JUNCTION TERMINAL)

    
    
    1. 

       *a	Rear view of wire harness connector (to No. 1 CAN Junction Terminal)

       Disconnect the No. 1 CAN junction terminal connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition Q33-3 (CANH) - Q33-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE NO. 1 CAN JUNCTION TERMINAL

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 CAN JUNCTION TERMINAL - NO. 6 CAN JUNCTION CONNECTOR)

12. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 CAN JUNCTION CONNECTOR)

    
    
    1. 

       *a	Component with harness connected (Network Gateway ECU)

       Disconnect the Q32 No. 6 CAN junction connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition I67-13 (CA2H) - I67-12 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

       Result
       Proceed to OK NG

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

13. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 CAN JUNCTION CONNECTOR)

    
    

    1. Measure the resistance according to the value(s) in the table below.

       

       *a	Front view of wire harness connector (to No. 6 CAN Junction Connector)	*b	to Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System)
       *c	to No. 1 CAN Junction Terminal	d	to Absorber Control ECU (w/ Adaptive Variable Suspension System)

       Standard Resistance

       Tester Connection Condition Specified Condition Q32-3 (CANH) - Q32-13 (CANL)*1 Cable disconnected from negative (-) battery terminal 200 Ω or higher Q32-4 (CANH) - Q32-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Q32-7 (CANH) - Q32-17 (CANL)*2 Cable disconnected from negative (-) battery terminal 200 Ω or higher *1: w/ Blind Spot Monitor System *2: w/ Adaptive Variable Suspension System

       Result
       Result Proceed to OK A NG (to blind spot monitor sensor LH CAN branch wire) (w/ Blind Spot Monitor System) B NG (to absorber control ECU CAN branch wire) (w/ Adaptive Variable Suspension System) C NG (to No. 1 CAN junction terminal CAN main wire) D

    
    

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    C

    CONNECT CONNECTOR Click here

    D

    CONNECT CONNECTOR Click here

    B

14. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 6 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

15. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH)

    
    
    1. 

       *a	Front view of wire harness connector (to Blind Spot Monitor Sensor LH)

       Disconnect the blind spot monitor sensor LH connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition V1-2 (CA1P) - V1-7 (CA1N) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BLIND SPOT MONITOR SENSOR LH (CA1P, CA1N)

16. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 6 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

17. CHECK FOR SHORT IN CAN BUS WIRES (ABSORBER CONTROL ECU)

    
    
    1. 

       *a	Rear view of wire harness connector (to Absorber Control ECU)

       Disconnect the absorber control ECU connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition Q22-8 (CANH) - Q22-7 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE ABSORBER CONTROL ECU Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO ABSORBER CONTROL ECU (CANH, CANL)

18. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 6 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

19. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION TERMINAL)

    
    
    1. 

       *a	Rear view of wire harness connector (to No. 1 CAN Junction Terminal)

       Disconnect the No. 1 CAN junction terminal connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition Q33-3 (CANH) - Q33-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE NO. 1 CAN JUNCTION TERMINAL

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 CAN JUNCTION TERMINAL - NO. 6 CAN JUNCTION CONNECTOR)

20. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 6 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

21. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 CAN JUNCTION CONNECTOR)

    
    

    1. Disconnect the No. 3 CAN junction connector.

       

       *a	Front view of wire harness connector (to No. 3 CAN Junction Connector)	*b	to Bus Buffer ECU (w/ Bus Buffer ECU)
       *c	to Telematics Transceiver (w/ Telematics Transceiver)	*d	to Network Gateway ECU
       *e	to Clearance Warning ECU Assembly (w/ LEXUS Parking Assist-sensor System)	*f	to Driving Support ECU Assembly (w/ Pre-crash Safety System)
       *g	to Lane Departure Warning Camera (w/ Lane Departure Alert System)	*h	to Parking Assist ECU (w/ Panoramic View Monitor System)
       *i	to No. 6 CAN Junction Connector	-	-

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition I95-1 (CANH) - I95-11 (CANL)*1 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-2 (CANH) - I95-12 (CANL)*2 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-4 (CANH) - I95-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω I95-6 (CANH) - I95-16 (CANL)*3 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-7 (CANH) - I95-17 (CANL)*4 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-8 (CANH) - I95-18 (CANL)*5 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-9 (CANH) - I95-19 (CANL)*6 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-10 (CANH) - I95-20 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω *1: w/ Bus Buffer ECU *2: w/ Telematics Transceiver *3: w/ LEXUS Parking Assist-sensor System *4: w/ Pre-crash Safety System *5: w/ Lane Departure Alert System *6: w/ Panoramic View Monitor System

       Result

       Result Proceed to OK A NG (to bus buffer ECU CAN branch wire) (w/ Bus Buffer ECU) B NG (to telematics transceiver CAN branch wire) (w/ Telematics Transceiver) C NG (to network gateway ECU CAN main wire) D NG (to clearance warning ECU assembly CAN branch wire) (w/ LEXUS Parking Assist-sensor System) E NG (to driving support ECU assembly CAN branch wire) (w/ Pre-crash Safety System) F NG (to lane departure warning camera CAN branch wire) (w/ Lane Departure Alert System) G NG (to parking assist ECU CAN branch wire) (w/ Panoramic View Monitor System) H NG (to No. 6 CAN junction connector CAN main wire) I

    
    

    A

    REPLACE NO. 3 CAN JUNCTION CONNECTOR

    C

    CONNECT CONNECTOR Click here

    D

    CONNECT CONNECTOR Click here

    E

    CONNECT CONNECTOR Click here

    F

    CONNECT CONNECTOR Click here

    G

    CONNECT CONNECTOR Click here

    H

    CONNECT CONNECTOR Click here

    I

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

    B

22. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

23. CHECK FOR SHORT IN CAN BUS WIRES (BUS BUFFER ECU)

    
    
    1. 

       *a	Front view of wire harness connector (to Bus Buffer ECU)

       Disconnect the bus buffer ECU connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition I130-4 (CAN+) - I130-8 (CAN-) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE BUS BUFFER ECU

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BUS BUFFER ECU (CAN+, CAN-)

24. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

25. CHECK FOR SHORT IN CAN BUS WIRES (TELEMATICS TRANSCEIVER)

    
    
    1. 

       *a	Front view of wire harness connector (to Telematics Transceiver)

       Disconnect the telematics transceiver connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition I40-15 (CANP) - I40-16 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE TELEMATICS TRANSCEIVER Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO TELEMATICS TRANSCEIVER (CANP, CANN)

26. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

27. CHECK FOR SHORT IN CAN BUS WIRES (NETWORK GATEWAY ECU)

    
    
    1. 

       *a	Rear view of wire harness connector (to Network Gateway ECU)

       Disconnect the network gateway ECU connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition I67-13 (CA2H) - I67-12 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE NETWORK GATEWAY ECU Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO NETWORK GATEWAY ECU (CA2H, CA2L)

28. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

29. CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY)

    
    
    1. 

       *a	Rear view of wire harness connector (to Clearance Warning ECU Assembly)

       Disconnect the clearance warning ECU assembly connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition I20-17 (R1) - I20-18 (R2) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CLEARANCE WARNING ECU ASSEMBLY (R1, R2)

30. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

31. CHECK FOR SHORT IN CAN BUS WIRES (DRIVING SUPPORT ECU ASSEMBLY)

    
    
    1. 

       *a	Rear view of wire harness connector (to Driving Support ECU Assembly)

       Disconnect the driving support ECU assembly connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition I19-39 (CA2H) - I19-17 (CA2L) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DRIVING SUPPORT ECU ASSEMBLY (CA2H, CA2L)

32. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

33. CHECK FOR SHORT IN CAN BUS WIRES (LANE DEPARTURE WARNING CAMERA)

    
    
    1. 

       *a	Front view of wire harness connector (to Lane Departure Warning Camera)

       Disconnect the lane departure warning camera connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition T10-6 (CA1P) - T10-12 (CA1N) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE LANE DEPARTURE WARNING CAMERA Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO LANE DEPARTURE WARNING CAMERA (CA1P, CA1N)

34. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

35. CHECK FOR SHORT IN CAN BUS WIRES (PARKING ASSIST ECU)

    
    
    1. 

       *a	Front view of wire harness connector (to Parking Assist ECU)

       Disconnect the parking assist ECU connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance
       Tester Connection Condition Specified Condition P19-9 (CANH) - P19-10 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE PARKING ASSIST ECU Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO PARKING ASSIST ECU (CANH, CANL)

36. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 CAN JUNCTION CONNECTOR)

    
    
    1. 

       *a	Component with harness connected (Network Gateway ECU)

       Disconnect the Q32 No. 6 CAN junction connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition I67-13 (CA2H) - I67-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher I67-12 (CA2L) - I67-4 (GND) Cable disconnected from negative (-) battery terminal 200 Ω or higher I67-13 (CA2H) - I67-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher I67-12 (CA2L) - I67-2 (BATT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

       Result
       Proceed to OK NG

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

37. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 CAN JUNCTION CONNECTOR)

    
    

    1. Measure the resistance according to the value(s) in the table below.

       

       *a	Front view of wire harness connector (to No. 6 CAN Junction Connector)	*b	Front view of DLC3
       *c	to Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System)	*d	to No. 1 CAN Junction Terminal
       *e	to Absorber Control ECU (w/ Adaptive Variable Suspension System)	-	-

       Standard Resistance

       Tester Connection Condition Specified Condition Q32-3 (CANH) - I7-4 (CG)*1 Cable disconnected from negative (-) battery terminal 200 Ω or higher Q32-13 (CANL) - I7-4 (CG)*1 Cable disconnected from negative (-) battery terminal 200 Ω or higher Q32-3 (CANH) - I7-16 (BAT)*1 Cable disconnected from negative (-) battery terminal 6 kΩ or higher Q32-13 (CANL) - I7-16 (BAT)*1 Cable disconnected from negative (-) battery terminal 6 kΩ or higher Q32-4 (CANH) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Q32-14 (CANL) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Q32-4 (CANH) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Q32-14 (CANL) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Q32-7 (CANH) - I7-4 (CG)*2 Cable disconnected from negative (-) battery terminal 200 Ω or higher Q32-17 (CANL) - I7-4 (CG)*2 Cable disconnected from negative (-) battery terminal 200 Ω or higher Q32-7 (CANH) - I7-16 (BAT)*2 Cable disconnected from negative (-) battery terminal 6 kΩ or higher Q32-17 (CANL) - I7-16 (BAT)*2 Cable disconnected from negative (-) battery terminal 6 kΩ or higher *1: w/ Blind Spot Monitor System *2: w/ Adaptive Variable Suspension System

       Result
       Result Proceed to OK A NG (to blind spot monitor sensor LH CAN branch wire) (w/ Blind Spot Monitor System) B NG (to absorber control ECU CAN branch wire) (w/ Adaptive Variable Suspension System) C NG (to No. 1 CAN junction terminal CAN main wire) D

    
    

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    C

    CONNECT CONNECTOR Click here

    D

    CONNECT CONNECTOR Click here

    B

38. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 6 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

39. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH)

    
    
    1. 

       *a	Front view of wire harness connector (to Blind Spot Monitor Sensor LH)
       *b	Front view of DLC3

       Disconnect the blind spot monitor sensor LH connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition V1-2 (CA1P) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher V1-7 (CA1N) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher V1-2 (CA1P) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher V1-7 (CA1N) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BLIND SPOT MONITOR SENSOR LH (CA1P, CA1N)

40. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 6 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

41. CHECK FOR SHORT IN CAN BUS WIRES (ABSORBER CONTROL ECU)

    
    
    1. 

       *a	Rear view of wire harness connector (to Absorber Control ECU)
       *b	Front view of DLC3

       Disconnect the absorber control ECU connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition Q22-8 (CANH) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Q22-7 (CANL) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Q22-8 (CANH) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Q22-7 (CANL) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE ABSORBER CONTROL ECU Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO ABSORBER CONTROL ECU (CANH, CANL)

42. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 6 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

43. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 CAN JUNCTION TERMINAL)

    
    
    1. 

       *a	Rear view of wire harness connector (to No. 1 CAN Junction Terminal)
       *b	Front view of DLC3

       Disconnect the No. 1 CAN junction terminal connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition Q33-3 (CANH) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Q33-2 (CANL) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Q33-3 (CANH) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Q33-2 (CANL) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE NO. 1 CAN JUNCTION TERMINAL

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 CAN JUNCTION TERMINAL - NO. 8 CAN JUNCTION CONNECTOR)

44. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 6 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

45. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 CAN JUNCTION CONNECTOR)

    
    

    1. Disconnect the No. 3 CAN junction connector.

       

       *a	Front view of wire harness connector (to No. 3 CAN Junction Connector)	*b	Front view of DLC3
       *c	to Bus Buffer ECU (w/ Bus Buffer ECU)	*d	to Telematics Transceiver (w/ Telematics Transceiver)
       *e	to Network Gateway ECU	*f	to Clearance Warning ECU Assembly (w/ LEXUS Parking Assist-sensor System)
       *g	to Driving Support ECU Assembly (w/ Pre-crash Safety System)	*h	to Lane Departure Warning Camera (w/ Lane Departure Alert System)
       *i	to Parking Assist ECU (w/ Panoramic View Monitor System)	*j	to No. 6 CAN Junction Connector

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition I95-1 (CANH) - I7-4 (CG)*1 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-11 (CANL) - I7-4 (CG)*1 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-1 (CANH) - I7-16 (BAT)*1 Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-11 (CANL) - I7-16 (BAT)*1 Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-2 (CANH) - I7-4 (CG)*2 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-12 (CANL) - I7-4 (CG)*2 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-2 (CANH) - I7-16 (BAT)*2 Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-12 (CANL) - I7-16 (BAT)*2 Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-4 (CANH) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-14 (CANL) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-4 (CANH) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-14 (CANL) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-6 (CANH) - I7-4 (CG)*3 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-16 (CANL) - I7-4 (CG)*3 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-6 (CANH) - I7-16 (BAT)*3 Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-16 (CANL) - I7-16 (BAT)*3 Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-7 (CANH) - I7-4 (CG)*4 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-17 (CANL) - I7-4 (CG)*4 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-7 (CANH) - I7-16 (BAT)*4 Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-17 (CANL) - I7-16 (BAT)*4 Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-8 (CANH) - I7-4 (CG)*5 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-18 (CANL) - I7-4 (CG)*5 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-8 (CANH) - I7-16 (BAT)*5 Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-18 (CANL) - I7-16 (BAT)*5 Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-9 (CANH) - I7-4 (CG)*6 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-19 (CANL) - I7-4 (CG)*6 Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-9 (CANH) - I7-16 (BAT)*6 Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-19 (CANL) - I7-16 (BAT)*6 Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-10 (CANH) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-20 (CANL) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I95-10 (CANH) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher I95-20 (CANL) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher *1: w/ Bus Buffer ECU *2: w/ Telematics Transceiver *3: w/ LEXUS Parking Assist-sensor System *4: w/ Pre-crash Safety System *5: w/ Lane Departure Alert System *6: w/ Panoramic View Monitor System

       Result

       Result Proceed to OK A NG (to bus buffer ECU CAN branch wire) (w/ Bus Buffer ECU) B NG (to telematics transceiver CAN branch wire) (w/ Telematics Transceiver) C NG (to network gateway ECU CAN main wire) D NG (to clearance warning ECU assembly CAN branch wire) (w/ LEXUS Parking Assist-sensor System) E NG (to driving support ECU assembly CAN branch wire) (w/ Pre-crash Safety System) F NG (to lane departure warning camera CAN branch wire) (w/ Lane Departure Alert System) G NG (to parking assist ECU CAN branch wire) (w/ Panoramic View Monitor System) H NG (to No. 6 CAN junction connector CAN main wire) I

    
    

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    C

    CONNECT CONNECTOR Click here

    D

    CONNECT CONNECTOR Click here

    E

    CONNECT CONNECTOR Click here

    F

    CONNECT CONNECTOR Click here

    G

    CONNECT CONNECTOR Click here

    H

    CONNECT CONNECTOR Click here

    I

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

    B

46. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

47. CHECK FOR SHORT IN CAN BUS WIRES (BUS BUFFER ECU)

    
    
    1. 

       *a	Front view of wire harness connector (to Bus Buffer ECU)
       *b	Front view of DLC3

       Disconnect the bus buffer ECU connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition I130-4 (CAN+) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I130-8 (CAN-) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I130-4 (CAN+) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher I130-8 (CAN-) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE BUS BUFFER ECU

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BUS BUFFER ECU (CAN+, CAN-)

48. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

49. CHECK FOR SHORT IN CAN BUS WIRES (TELEMATICS TRANSCEIVER)

    
    
    1. 

       *a	Front view of wire harness connector (to Telematics Transceiver)
       *b	Front view of DLC3

       Disconnect the telematics transceiver connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition I40-15 (CANP) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I40-16 (CANN) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I40-15 (CANP) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher I40-16 (CANN) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE TELEMATICS TRANSCEIVER Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO TELEMATICS TRANSCEIVER (CANP, CANN)

50. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

51. CHECK FOR SHORT IN CAN BUS WIRES (NETWORK GATEWAY ECU)

    
    
    1. 

       *a	Rear view of wire harness connector (to Network Gateway ECU)
       *b	Front view of DLC3

       Disconnect the network gateway ECU connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition I67-13 (CA2H) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I67-12 (CA2L) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I67-13 (CA2H) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher I67-12 (CA2L) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE NETWORK GATEWAY ECU Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO NETWORK GATEWAY ECU (CA2H, CA2L)

52. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

53. CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY)

    
    
    1. 

       *a	Rear view of wire harness connector (to Clearance Warning ECU Assembly)
       *b	Front view of DLC3

       Disconnect the clearance warning ECU assembly connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition I20-17 (R1) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I20-18 (R2) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I20-17 (R1) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher I20-18 (R2) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CLEARANCE WARNING ECU ASSEMBLY (R1, R2)

54. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

55. CHECK FOR SHORT IN CAN BUS WIRES (DRIVING SUPPORT ECU ASSEMBLY)

    
    
    1. 

       *a	Rear view of wire harness connector (to Driving Support ECU Assembly)
       *b	Front view of DLC3

       Disconnect the driving support ECU assembly connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition I19-39 (CA2H) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I19-17 (CA2L) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher I19-39 (CA2H) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher I19-17 (CA2L) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DRIVING SUPPORT ECU ASSEMBLY (CA2H, CA2L)

56. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

57. CHECK FOR SHORT IN CAN BUS WIRES (LANE DEPARTURE WARNING CAMERA)

    
    
    1. 

       *a	Front view of wire harness connector (to Lane Departure Warning Camera)
       *b	Front view of DLC3

       Disconnect the lane departure warning camera connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition T10-6 (CA1P) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher T10-12 (CA1N) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher T10-6 (CA1P) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher T10-12 (CA1N) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE LANE DEPARTURE WARNING CAMERA Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO LANE DEPARTURE WARNING CAMERA (CA1P, CA1N)

58. CONNECT CONNECTOR

    
    

    1. Reconnect the No. 3 CAN junction connector.

       Result
       Proceed to NEXT

    
    

    NEXT

59. CHECK FOR SHORT IN CAN BUS WIRES (PARKING ASSIST ECU)

    
    
    1. 

       *a	Front view of wire harness connector (to Parking Assist ECU)
       *b	Front view of DLC3

       Disconnect the parking assist ECU connector.

    2. Measure the resistance according to the value(s) in the table below.

       Standard Resistance

       Tester Connection Condition Specified Condition P19-9 (CANH) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher P19-10 (CANL) - I7-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher P19-9 (CANH) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher P19-10 (CANL) - I7-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE PARKING ASSIST ECU Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO PARKING ASSIST ECU (CANH, CANL)