CAN COMMUNICATION SYSTEM, Diagnostic DTC:U1002

DESCRIPTION

• The power management control ECU stores this DTC when no signals can be received from the ECUs that have been memorized as those connected to the power management bus.

• When the power management control ECU receives a response signal from the ECUs connected to the power management bus, the power management ECU recognizes and memorizes that the ECU is connected to the power management bus. Based on this memorized data, the power management control ECU monitors for malfunctions in the ECUs connected to the power management bus when communicating with those ECUs. If the power management control ECU cannot receive response signals from the ECUs that have been memorized as those connected to the power management bus, the power management control 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 [branch wire]/CANL [branch wire] of the ECU and/or sensor is open).

• *: w/ Entry and Start System

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. PRECAUTION

   Note

   After turning the ignition 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 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 VEHICLE CONDITION

   
   

   1. Check the vehicle condition.

      Result

      Result	Proceed to
      w/ Entry and Start System	A
      w/o Entry and Start System	B

   
   

   B

   CHECK FOR OPEN IN CAN BUS WIRE (POWER MANAGEMENT CONTROL ECU MAIN WIRE) Click here

   A

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

   
   
   1. 

      Text in Illustration

      *1	Component with harness connected (to Power Management Control ECU)

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

      Standard Resistance

      Tester Connection Switch Condition Specified Condition Resistance: Malfunction H71-12 (CA3P) - H71-11 (CA3N) Ignition switch off 54 to 69 Ω Below 54 Ω: Short in line H71-12 (CA3P) - H71-11 (CA3N) Ignition switch off 54 to 69 Ω Higher than 69 Ω: Open in CAN main bus line H71-12 (CA3P) - H71-1 (AM22) Ignition switch off 6 kΩ or higher Below 6 kΩ: +B short H71-11 (CA3N) - H71-1 (AM22) Ignition switch off 6 kΩ or higher Below 6 kΩ: +B short H71-12 (CA3P) - H71-6 (GND) Ignition switch off 200 Ω or higher Below 200 Ω: Ground short H71-11 (CA3N) - H71-6 (GND) Ignition switch off 200 Ω or higher Below 200 Ω: Ground short

      Result

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

   
   

   B

   CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER) Click here

   C

   CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY AND GROUND) Click here

   A

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

   
   
   1. 

      Text in Illustration

      *1	Rear view of wire harness connector (to No. 3 Junction Connector)

      Disconnect the H89 No. 3 junction connector connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition H89-7 (CANH) - H89-18 (CANL) Ignition switch off 108 to 132 Ω

   
   

   NG

   CONNECT CONNECTOR Click here

   OK

6. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU)

   
   
   1. 

      Text in Illustration

      *1	Rear view of wire harness connector (to No. 3 Junction Connector)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition H89-8 (CANH) - H89-19 (CANL) Ignition switch off 108 to 132 Ω

   
   

   NG

   CONNECT CONNECTOR Click here

   OK

   REPAIR OR REPLACE NO. 3 JUNCTION CONNECTOR

7. CONNECT CONNECTOR

   
   

   1. Reconnect the H89 No. 3 junction connector connector.

   
   

   NEXT

8. CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 3 JUNCTION CONNECTOR)

   
   
   1. 

      Text in Illustration

      *1	Rear view of wire harness connector (to ECM)
      *2	for AD Series Engine
      *3	for ZR Series Engine

      Disconnect the A51 ECM connector.

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

      Standard Resistance
      for AD Series Engine
      Tester Connection Switch Condition Specified Condition A51-5 (CANP) - A51-4 (CANN) Ignition switch off 108 to 132 Ω
      for ZR Series Engine
      Tester Connection Switch Condition Specified Condition A51-6 (CANP) - A51-7 (CANN) Ignition switch off 108 to 132 Ω

      Result

      Result	Proceed to
      OK (for 1AD-FTV)	A
      OK (for 2AD-FHV)	B
      OK (for 1ZR-FAE)	C
      OK (for 2ZR-FAE)	D
      NG	E

   
   

   B

   REPLACE ECM Click here

   C

   REPLACE ECM Click here

   D

   REPLACE ECM Click here

   E

   REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 3 JUNCTION CONNECTOR)

   A

   REPLACE ECM Click here

9. CONNECT CONNECTOR

   
   

   1. Reconnect the H89 No. 3 junction connector connector.

   
   

   NEXT

10. CHECK FOR OPEN IN CAN BUS MAIN WIRE (POWER MANAGEMENT CONTROL ECU - NO. 3 JUNCTION CONNECTOR)

    
    
    1. 

       Text in Illustration

       *1	Rear view of wire harness connector (to Power Management Control ECU)

       Disconnect the H71 power management control ECU connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition H71-12 (CA3P) - H71-11 (CA3N) Ignition switch off 108 to 132 Ω

       Result

       Result	Proceed to
       OK (for LHD)	A
       OK (for RHD)	B
       NG	C

    
    

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO POWER MANAGEMENT CONTROL ECU (POWER MANAGEMENT CONTROL ECU - NO. 3 JUNCTION CONNECTOR)

    A

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

11. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER)

    
    
    1. 

       Text in Illustration

       *1	Rear view of wire harness connector (to No. 3 Junction Connector)
       *2	Front view of DLC3

       Disconnect the H89 No. 3 junction connector connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition H89-9 (CANH) - H89-20 (CANL) Ignition switch off 200 Ω or higher H89-9 (CANH) - H16-4 (CG) Ignition switch off 200 Ω or higher H89-20 (CANL) - H16-4 (CG) Ignition switch off 200 Ω or higher H89-9 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher H89-20 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

12. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - ECM)

    
    
    1. 

       Text in Illustration

       *1	Rear view of wire harness connector (to No. 3 Junction Connector)
       *2	Front view of DLC3

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition H89-7 (CANH) - H89-18 (CANL) Ignition switch off 108 to 132 Ω H89-7 (CANH) - H16-4 (CG) Ignition switch off 200 Ω or higher H89-18 (CANL) - H16-4 (CG) Ignition switch off 200 Ω or higher H89-7 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher H89-18 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

13. CHECK FOR SHORT IN CAN BUS WIRES (NO. 3 JUNCTION CONNECTOR - POWER MANAGEMENT CONTROL ECU)

    
    
    1. 

       Text in Illustration

       *1	Rear view of wire harness connector (to No. 3 Junction Connector)
       *2	Front view of DLC3

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition H89-8 (CANH) - H89-19 (CANL) Ignition switch off 108 to 132 Ω H89-8 (CANH) - H16-4 (CG) Ignition switch off 200 Ω or higher H89-19 (CANL) - H16-4 (CG) Ignition switch off 200 Ω or higher H89-8 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher H89-19 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher

    
    

    NG

    CONNECT CONNECTOR Click here

    OK

    REPAIR OR REPLACE NO. 3 JUNCTION CONNECTOR

14. CONNECT CONNECTOR

    
    

    1. Reconnect the H89 No. 3 junction connector connector.

    
    

    NEXT

15. CHECK FOR SHORT IN CAN BUS WIRES (AIR CONDITIONING AMPLIFIER)

    
    
    1. 

       Text in Illustration

       *1	for Automatic Air Conditioning System
       *2	for Manual Air Conditioning System and w/o Air Conditioning System
       *3	Front view of wire harness connector (to Air Conditioning Amplifier Assembly)
       *4	Front view of DLC3

       Disconnect the H46*1 or H9*2 air conditioning amplifier assembly connector.

       
       

       • *1: for Automatic Air Conditioning System

         *2: for Manual Air Conditioning System and w/o Air Conditioning System

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

       Standard Resistance
       for Automatic Air Conditioning System
       Tester Connection Switch Condition Specified Condition H46-11 (CANH) - H46-12 (CANL) Ignition switch off 200 Ω or higher H46-11 (CANH) - H16-4 (CG) Ignition switch off 200 Ω or higher H46-12 (CANL) - H16-4 (CG) Ignition switch off 200 Ω or higher H46-11 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher H46-12 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
       for Manual Air Conditioning System and w/o Air Conditioning System
       Tester Connection Switch Condition Specified Condition H9-2 (CANH) - H9-3 (CANL) Ignition switch off 200 Ω or higher H9-2 (CANH) - H16-4 (CG) Ignition switch off 200 Ω or higher H9-3 (CANL) - H16-4 (CG) Ignition switch off 200 Ω or higher H9-2 (CANH) - H16-16 (BAT) Ignition switch off 6 kΩ or higher H9-3 (CANL) - H16-16 (BAT) Ignition switch off 6 kΩ or higher

    
    

    NG

    REPAIR OR REPLACE AIR CONDITIONING AMPLIFIER CAN BRANCH WIRE OR CONNECTOR (CANH, CANL)

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

16. CONNECT CONNECTOR

    
    

    1. Reconnect the H89 No. 3 junction connector connector.

    
    

    NEXT

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

    
    
    1. 

       Text in Illustration

       *1	Front view of wire harness connector (to ECM)
       *2	Front view of DLC3
       *3	for AD Series Engine
       *4	for ZR Series Engine

       Disconnect the A51 ECM connector.

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

       Standard Resistance
       for AD Series Engine
       Tester Connection Switch Condition Specified Condition A51-5 (CANP) - A51-4 (CANN) Ignition switch off 200 Ω or higher A51-5 (CANP) - H16-4 (CG) Ignition switch off 200 Ω or higher A51-4 (CANN) - H16-4 (CG) Ignition switch off 200 Ω or higher A51-5 (CANP) - H16-16 (BAT) Ignition switch off 6 kΩ or higher A51-4 (CANN) - H16-16 (BAT) Ignition switch off 6 kΩ or higher
       for ZR Series Engine
       Tester Connection Switch Condition Specified Condition A51-6 (CANP) - A51-7 (CANN) Ignition switch off 200 Ω or higher A51-6 (CANP) - H16-4 (CG) Ignition switch off 200 Ω or higher A51-7 (CANN) - H16-4 (CG) Ignition switch off 200 Ω or higher A51-6 (CANP) - H16-16 (BAT) Ignition switch off 6 kΩ or higher A51-7 (CANN) - H16-16 (BAT) Ignition switch off 6 kΩ or higher

       Result

       Result	Proceed to
       OK (for 1AD-FTV)	A
       OK (for 2AD-FHV)	B
       OK (for 1ZR-FAE)	C
       OK (for 2ZR-FAE)	D
       NG	E

    
    

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here

    D

    REPLACE ECM Click here

    E

    REPAIR OR REPLACE ECM CAN MAIN WIRE OR CONNECTOR (CANP, CANN)

    A

    REPLACE ECM Click here

18. CONNECT CONNECTOR

    
    

    1. Reconnect the H89 No. 3 junction connector connector.

    
    

    NEXT

19. CHECK FOR SHORT IN CAN BUS WIRES (POWER MANAGEMENT CONTROL ECU)

    
    
    1. 

       Text in Illustration

       *1	Rear view of wire harness connector (to Power Management Control ECU)
       *2	Front view of DLC3

       Disconnect the H71 power management control ECU connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition H71-12 (CA3P) - H71-11 (CA3N) Ignition switch off 200 Ω or higher H71-12 (CA3P) - H16-4 (CG) Ignition switch off 200 Ω or higher H71-11 (CA3N) - H16-4 (CG) Ignition switch off 200 Ω or higher H71-12 (CA3P) - H16-16 (BAT) Ignition switch off 6 kΩ or higher H71-11 (CA3N) - H16-16 (BAT) Ignition switch off 6 kΩ or higher

       Result

       Result	Proceed to
       OK (for LHD)	A
       OK (for RHD)	B
       NG	C

    
    

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    REPAIR OR REPLACE POWER MANAGEMENT CONTROL ECU CAN MAIN WIRE OR CONNECTOR (CA3P, CA3N)

    A

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

20. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY AND GROUND)

    
    
    1. 

       Text in Illustration

       *1	Rear view of wire harness connector (to Power Management Control ECU)

       Connect 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. Disconnect the H71 power management control ECU connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition H71-5 (GND2) - Body ground Always Below 1 Ω H71-6 (GND) - Body ground Always Below 1 Ω

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

       Standard Voltage
       Tester Connection Condition Specified Condition H71-1 (AM22) - Body ground Always 11 to 14 V H71-2 (AM21) - Body ground Always 11 to 14 V

       Result

       Result	Proceed to
       OK (for LHD)	A
       OK (for RHD)	B
       NG	C

    
    

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

21. CHECK FOR OPEN IN CAN BUS WIRE (POWER MANAGEMENT CONTROL ECU MAIN WIRE)

    
    
    1. 

       Text in Illustration

       *1	Rear view of wire harness connector (to Power Management Control ECU)

       Disconnect the H72 power management control ECU connector.

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

       Standard Resistance
       Tester Connection Switch Condition Specified Condition H72-4 (CA3P) - H72-3 (CA3N) Ignition switch off 108 to 132 Ω

    
    

    NG

    REPAIR OR REPLACE POWER MANAGEMENT CONTROL ECU CAN MAIN WIRE OR CONNECTOR (CA3P, CA3N)

    OK

22. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY AND BODY GROUND)

    
    
    1. 

       Text in Illustration

       *1	Rear view of wire harness connector (to Power Management Control ECU)

       Connect 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. Disconnect the H72 power management control ECU connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition H72-12 (GND) - Body ground Always Below 1 Ω

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

       Standard Voltage
       Tester Connection Switch Condition Specified Condition H72-8 (AM21) - Body ground Always 11 to 14 V H72-2 (IG2) - Body ground Ignition switch ON 11 to 14 V

       Result

       Result	Proceed to
       OK (for LHD)	A
       OK (for RHD)	B
       NG	C

    
    

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE POWER MANAGEMENT CONTROL ECU Click here