CAN COMMUNICATION SYSTEM(for RHD), Diagnostic DTC:U1004

DESCRIPTION

• The ECM stores this DTC when no signals can be received from the ECUs that have been memorized as those connected to the braking and driving bus.

• When the ECM receives a response signal from the ECUs connected to the braking and driving bus, the ECM recognizes and memorizes that the ECU is connected to the braking and driving bus. Based on this memorized data, the ECM monitors for malfunctions in the ECUs connected to the braking and driving bus when communicating with those ECUs. If the ECM cannot receive response signals from the ECUs that have been memorized as those connected to the braking and driving bus, the ECM 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/ Blind Spot Monitor System

• *2: w/ Pre-crash Safety System

• *3: w/ Variable Gear Ratio Steering System

• *4: w/ Air Suspension System

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. PRECAUTION

   Note

   After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.

   
   

   NEXT

2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

   
   

   1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Note

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

   
   

   NEXT

3. CHECK CAN BUS WIRE (CAN MAIN WIRE FOR DISCONNECTION, BUS LINE FOR SHORT CIRCUIT)

   
   
   1. 

      Text in Illustration

      *a	Component with harness connected (Parking Brake ECU Assembly)

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

      Standard Resistance

      Tester Connection Switch Condition Specified Condition Resistance: Malfunction S48-9 (CA2H) - S48-1 (CA2L) Engine switch off 54 to 69 Ω Below 53 Ω: Short in line S48-9 (CA2H) - S48-1 (CA2L) Engine switch off 54 to 69 Ω Higher than 70 Ω: Open in CAN main bus line S48-9 (CA2H) - S48-2 (BECU) Engine switch off 6 kΩ or higher Below 6 kΩ: +B short S48-1 (CA2L) - S48-2 (BECU) Engine switch off 6 kΩ or higher Below 6 kΩ: +B short S48-9 (CA2H) - S46-3 (GND1) Engine switch off 200 Ω or higher Below 200 Ω: Ground short S48-1 (CA2L) - S46-3 (GND1) Engine switch off 200 Ω or higher Below 200 Ω: Ground short

      Result

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

   
   

   B

   CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR SIDE) Click here

   C

   CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND BODY GROUND) Click here

   A

4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 4 JUNCTION CONNECTOR - PARKING BRAKE ECU ASSEMBLY)

   
   
   1. 

      Text in Illustration

      *a	Rear view of wire harness connector (to No. 4 Junction Connector)

      Disconnect the No. 4 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition S58-10 (CANH) - S58-21 (CANL) Engine switch off 108 to 132 Ω

   
   

   NG

   CONNECT CONNECTOR Click here

   OK

5. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 4 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)

   
   
   1. 

      Text in Illustration

      *a	Rear view of wire harness connector (to No. 4 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition S58-11 (CANH) - S58-22 (CANL) Engine switch off 108 to 132 Ω

   
   

   OK

   REPLACE NO. 4 JUNCTION CONNECTOR

   NG

   CONNECT CONNECTOR Click here

6. CONNECT CONNECTOR

   
   

   1. Reconnect the S58 No. 4 junction connector.

   
   

   NEXT

7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (PARKING BRAKE ECU ASSEMBLY - NO. 4 JUNCTION CONNECTOR)

   
   
   1. 

      Text in Illustration

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

      Disconnect the parking brake ECU assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition S48-9 (CA2H) - S48-1 (CA2L) Engine switch off 108 to 132 Ω

   
   

   OK

   REPLACE PARKING BRAKE ECU ASSEMBLY Click here

   NG

   REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO PARKING BRAKE ECU ASSEMBLY (PARKING BRAKE ECU ASSEMBLY - NO. 4 JUNCTION CONNECTOR)

8. CONNECT CONNECTOR

   
   

   1. Reconnect the S58 No. 4 junction connector.

   
   

   NEXT

9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 6 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)

   
   
   1. 

      Text in Illustration

      *a	Rear view of wire harness connector (to No. 6 Junction Connector)

      Disconnect the No. 6 junction connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition A65-8 (CANH) - A65-19 (CANL) Engine switch off 108 to 132 Ω

   
   

   NG

   CONNECT CONNECTOR Click here

   OK

10. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 6 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR)

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 6 Junction Connector)

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A65-7 (CANH) - A65-18 (CANL) Engine switch off 108 to 132 Ω

    
    

    OK

    REPLACE NO. 6 JUNCTION CONNECTOR

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR)

11. CONNECT CONNECTOR

    
    

    1. Reconnect the A65 No. 6 junction connector.

    
    

    NEXT

12. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 7 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 7 Junction Connector)

       Disconnect the No. 7 junction connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A66-1 (CANH) - A66-12 (CANL) Engine switch off 108 to 132 Ω

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

13. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 7 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR)

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 7 Junction Connector)

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A66-4 (CANH) - A66-15 (CANL) Engine switch off 108 to 132 Ω

    
    

    OK

    REPLACE NO. 7 JUNCTION CONNECTOR

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 7 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR)

14. CONNECT CONNECTOR

    
    

    1. Reconnect the A66 No. 7 junction connector.

    
    

    NEXT

15. CHECK FOR OPEN IN CAN BUS MAIN WIRE (POWER STEERING ECU ASSEMBLY - NO. 7 JUNCTION CONNECTOR)

    
    
    1. 

       Text in Illustration

       *a	Front view of wire harness connector (to Power Steering ECU Assembly)

       Disconnect the power steering ECU assembly connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A44-1 (CA2H) - A44-8 (CA2L) Engine switch off 108 to 132 Ω

    
    

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER STEERING ECU ASSEMBLY (POWER STEERING ECU ASSEMBLY - NO. 7 JUNCTION CONNECTOR)

16. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR SIDE)

    
    
    1. 

       Text in Illustration

       *a	Component with harness connected (Parking Brake ECU Assembly)

       Disconnect the A66 No. 7 junction connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition S48-9 (CA2H) - S48-1 (CA2L) Engine switch off 108 to 132 Ω S48-9 (CA2H) - S46-3 (GND1) Engine switch off 200 Ω or higher S48-1 (CA2L) - S46-3 (GND1) Engine switch off 200 Ω or higher S48-9 (CA2H) - S48-2 (BECU) Engine switch off 6 kΩ or higher S48-1 (CA2L) - S48-2 (BECU) Engine switch off 6 kΩ or higher

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

17. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - SKID CONTROL ECU ASSEMBLY)

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 7 Junction Connector)
       *b	Front view of DLC3

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A66-2 (CANH) - A66-13 (CANL) Engine switch off 200 Ω or higher A66-2 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher A66-13 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher A66-2 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher A66-13 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

18. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - SUSPENSION CONTROL ECU)

    Note

    For vehicles without an air suspension system, go to "Check for Short in CAN Bus Wires (No. 7 Junction Connector - Clearance Warning ECU Assembly)".

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 7 Junction Connector)
       *b	Front view of DLC3

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A66-3 (CANH) - A66-14 (CANL) Engine switch off 200 Ω or higher A66-3 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher A66-14 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher A66-3 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher A66-14 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

19. CHECK FOR SHORT IN CAN BUS WIRES (NO. 7 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 7 Junction Connector)
       *b	Front view of DLC3

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A66-1 (CANH) - A66-12 (CANL) Engine switch off 108 to 132 Ω A66-1 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher A66-12 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher A66-1 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher A66-12 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    OK

    REPLACE NO. 7 JUNCTION CONNECTOR

    NG

    CONNECT CONNECTOR Click here

20. CONNECT CONNECTOR

    
    

    1. Reconnect the A66 No. 7 junction connector.

    
    

    NEXT

21. CHECK FOR SHORT IN CAN BUS WIRES (SKID CONTROL ECU ASSEMBLY)

    
    
    1. 

       Text in Illustration

       *a	Front view of wire harness connector (to Skid Control ECU Assembly)
       *b	Front view of DLC3

       Disconnect the skid control ECU assembly connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A19-7 (CA2H) - A19-6 (CA2L) Engine switch off 54 to 69 Ω A19-7 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher A19-6 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher A19-7 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher A19-6 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    OK

    REPLACE SKID CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SKID CONTROL ECU ASSEMBLY (CA2H, CA2L)

22. CONNECT CONNECTOR

    
    

    1. Reconnect the A66 No. 7 junction connector.

    
    

    NEXT

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

    
    
    1. 

       Text in Illustration

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

       Disconnect the suspension control ECU connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition R1-22 (CA2H) - R1-21 (CA2L) Engine switch off 54 to 69 Ω R1-22 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher R1-21 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher R1-22 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher R1-21 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    OK

    REPLACE SUSPENSION CONTROL ECU Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO SUSPENSION CONTROL ECU (CA2H, CA2L)

24. CONNECT CONNECTOR

    
    

    1. Reconnect the A66 No. 7 junction connector.

    
    

    NEXT

25. CHECK FOR SHORT IN CAN BUS WIRES (POWER STEERING ECU ASSEMBLY)

    
    
    1. 

       Text in Illustration

       *a	Front view of wire harness connector (to Power Steering ECU Assembly)
       *b	Front view of DLC3

       Disconnect the power steering ECU assembly connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A44-1 (CA2H) - A44-8 (CA2L) Engine switch off 108 to 132 Ω A44-1 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher A44-8 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher A44-1 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher A44-8 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER STEERING ECU ASSEMBLY (CA2H, CA2L)

26. CONNECT CONNECTOR

    
    

    1. Reconnect the A66 No. 7 junction connector.

    
    

    NEXT

27. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 6 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR)

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 6 Junction Connector)
       *b	Front view of DLC3

       Disconnect the No. 6 junction connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A65-8 (CANH) - A65-19 (CANL) Engine switch off 108 to 132 Ω A65-8 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher A65-19 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher A65-8 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher A65-19 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR)

    OK

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

    
    
    1. 

       Text in Illustration

       *a	Component with harness connected (Parking Brake ECU Assembly)

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition S48-9 (CA2H) - S48-1 (CA2L) Engine switch off 108 to 132 Ω S48-9 (CA2H) - S46-3 (GND1) Engine switch off 200 Ω or higher S48-1 (CA2L) - S46-3 (GND1) Engine switch off 200 Ω or higher S48-9 (CA2H) - S48-2 (BECU) Engine switch off 6 kΩ or higher S48-1 (CA2L) - S48-2 (BECU) Engine switch off 6 kΩ or higher

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

29. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - DRIVING SUPPORT ECU ASSEMBLY)

    Note

    For vehicles without a pre-crash safety system, go to "Check for Short in CAN Bus Wires (No. 6 Junction Connector - Clearance Warning ECU Assembly)".

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 6 Junction Connector)
       *b	Front view of DLC3

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A65-11 (CANH) - A65-22 (CANL) Engine switch off 200 Ω or higher A65-11 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher A65-22 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher A65-11 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher A65-22 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

30. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - CLEARANCE WARNING ECU ASSEMBLY)

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 6 Junction Connector)
       *b	Front view of DLC3

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A65-6 (CANH) - A65-17 (CANL) Engine switch off 200 Ω or higher A65-6 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher A65-17 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher A65-6 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher A65-17 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

31. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - STEERING CONTROL ECU)

    Note

    For vehicles without a variable gear ratio steering system, go to "Check for Short in CAN Bus Wires (No. 6 Junction Connector - ECM)".

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 6 Junction Connector)
       *b	Front view of DLC3

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A65-9 (CANH) - A65-20 (CANL) Engine switch off 200 Ω or higher A65-9 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher A65-20 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher A65-9 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher A65-20 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

32. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 JUNCTION CONNECTOR - ECM)

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 6 Junction Connector)
       *b	Front view of DLC3

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A65-10 (CANH) - A65-21 (CANL) Engine switch off 200 Ω or higher A65-10 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher A65-21 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher A65-10 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher A65-21 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    OK

    REPLACE NO. 6 JUNCTION CONNECTOR

    NG

    CONNECT CONNECTOR Click here

33. CONNECT CONNECTOR

    
    

    1. Reconnect the A65 No. 6 junction connector.

    
    

    NEXT

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

    
    
    1. 

       Text in Illustration

       *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 Switch Condition Specified Condition A33-16 (CA2H) - A33-17 (CA2L) Engine switch off 54 to 69 Ω A33-16 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher A33-17 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher A33-16 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher A33-17 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    OK

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

    NG

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

35. CONNECT CONNECTOR

    
    

    1. Reconnect the A65 No. 6 junction connector.

    
    

    NEXT

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

    
    
    1. 

       Text in Illustration

       *a	Front 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 Switch Condition Specified Condition L169-3 (CA2H) - L169-5 (CA2L) Engine switch off 54 to 69 Ω L169-3 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher L169-5 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher L169-3 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher L169-5 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    OK

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CLEARANCE WARNING ECU ASSEMBLY (CA2H, CA2L)

37. CONNECT CONNECTOR

    
    

    1. Reconnect the A65 No. 6 junction connector.

    
    

    NEXT

38. CHECK FOR SHORT IN CAN BUS WIRES (STEERING CONTROL ECU)

    
    
    1. 

       Text in Illustration

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

       Disconnect the steering control ECU connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A42-4 (CAN+) - A42-9 (CAN-) Engine switch off 54 to 69 Ω A42-4 (CAN+) - L31-4 (CG) Engine switch off 200 Ω or higher A42-9 (CAN-) - L31-4 (CG) Engine switch off 200 Ω or higher A42-4 (CAN+) - L31-16 (BAT) Engine switch off 6 kΩ or higher A42-9 (CAN-) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    OK

    REPLACE STEERING CONTROL ECU Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO STEERING CONTROL ECU (CAN+, CAN-)

39. CONNECT CONNECTOR

    
    

    1. Reconnect the A65 No. 6 junction connector.

    
    

    NEXT

40. CHECK FOR SHORT IN CAN BUS WIRES (ECM)

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to ECM)
       *b	Front view of DLC3

       Disconnect the ECM connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition A13-18 (CA2H) - A13-17 (CA2L) Engine switch off 54 to 69 Ω A13-18 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher A13-17 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher A13-18 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher A13-17 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO ECM (CA2H, CA2L)

41. CONNECT CONNECTOR

    
    

    1. Reconnect the A65 No. 6 junction connector.

    
    

    NEXT

42. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR)

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 4 Junction Connector)
       *b	Front view of DLC3

       Disconnect the No. 4 junction connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition S58-11 (CANH) - S58-22 (CANL) Engine switch off 108 to 132 Ω S58-11 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher S58-22 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher S58-11 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher S58-22 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 4 JUNCTION CONNECTOR - NO. 6 JUNCTION CONNECTOR)

    OK

43. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - BLIND SPOT MONITOR SENSOR LH)

    Note

    For vehicles without a blind spot monitor system, go to "Check for Short in CAN Bus Wires (No. 4 Junction Connector - Parking Brake ECU Assembly)".

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 4 Junction Connector)
       *b	Front view of DLC3

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition S58-8 (CANH) - S58-19 (CANL) Engine switch off 200 Ω or higher S58-8 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher S58-19 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher S58-8 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher S58-19 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

44. CHECK FOR SHORT IN CAN BUS WIRES (NO. 4 JUNCTION CONNECTOR - PARKING BRAKE ECU ASSEMBLY)

    
    
    1. 

       Text in Illustration

       *a	Rear view of wire harness connector (to No. 4 Junction Connector)
       *b	Front view of DLC3

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition S58-10 (CANH) - S58-21 (CANL) Engine switch off 108 to 132 Ω S58-10 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher S58-21 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher S58-10 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher S58-21 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    OK

    REPLACE NO. 4 JUNCTION CONNECTOR

    NG

    CONNECT CONNECTOR Click here

45. CONNECT CONNECTOR

    
    

    1. Reconnect the S58 No. 4 junction connector.

    
    

    NEXT

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

    
    
    1. 

       Text in Illustration

       *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 Switch Condition Specified Condition m2-2 (CA1P) - m2-7 (CA1N) Engine switch off 54 to 69 Ω m2-2 (CA1P) - L31-4 (CG) Engine switch off 200 Ω or higher m2-7 (CA1N) - L31-4 (CG) Engine switch off 200 Ω or higher m2-2 (CA1P) - L31-16 (BAT) Engine switch off 6 kΩ or higher m2-7 (CA1N) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    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)

47. CONNECT CONNECTOR

    
    

    1. Reconnect the S58 No. 4 junction connector.

    
    

    NEXT

48. CHECK FOR SHORT IN CAN BUS WIRES (PARKING BRAKE ECU ASSEMBLY)

    
    
    1. 

       Text in Illustration

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

       Disconnect the parking brake ECU assembly connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition S48-9 (CA2H) - S48-1 (CA2L) Engine switch off 108 to 132 Ω S48-9 (CA2H) - L31-4 (CG) Engine switch off 200 Ω or higher S48-1 (CA2L) - L31-4 (CG) Engine switch off 200 Ω or higher S48-9 (CA2H) - L31-16 (BAT) Engine switch off 6 kΩ or higher S48-1 (CA2L) - L31-16 (BAT) Engine switch off 6 kΩ or higher

    
    

    OK

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO PARKING BRAKE ECU ASSEMBLY (CA2H, CA2L)

49. CHECK HARNESS AND CONNECTOR (ECM - BATTERY AND BODY GROUND)

    
    

    1. Connect the cable to the negative (-) battery terminal.

       

       Text in Illustration

       *a

       Rear view of wire harness connector (to ECM)

       -

       -

       Note

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

    2. Disconnect the ECM connectors.

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

       Standard Voltage
       Tester Connection Condition Specified Condition A14-7 (BATT) - Body ground Always 11 to 14 V A14-8 (IGSW) - Body ground Engine switch on (IG) 11 to 14 V A13-1 (+B2) - Body ground Engine switch on (IG) 11 to 14 V A13-2 (+B) - Body ground Engine switch on (IG) 11 to 14 V

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

       Standard Resistance
       Tester Connection Condition Specified Condition A14-1 (EC) - Body ground Always Below 1 Ω E2-5 (ME01) - Body ground Always Below 1 Ω E3-1 (E1) - Body ground Always Below 1 Ω E2-2 (E01) - Body ground Always Below 1 Ω E2-1 (E02) - Body ground Always Below 1 Ω E3-4 (E04) - Body ground Always Below 1 Ω

    
    

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR