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

DTC Code DTC Name
U1002 Lost Communication with Gateway Module (Parking Assist Bus)

DESCRIPTION


DTC Code DTC Detection Condition Trouble Area
U1002 Driving support ECU assembly cannot receive signals from all ECUs that have been memorized as those connected to sub bus 13.

  • Open or short in sub bus 13 main line or connector

  • Open or short in sub bus 13 branch line or connector

  • Millimeter wave radar sensor assembly

  • Driving support ECU assembly

  • Driver monitor ECU assembly*1

  • Lane recognition camera sensor assembly*2

  • No. 1 night view ECU*3

  • Open or short in No. 3 junction connector

  • Open or short in No. 7 junction connector

  • Open or short in No. 12 junction connector

WIRING DIAGRAM

A01FTHXE02

INSPECTION PROCEDURE

Note


  • Before measuring the resistance of the CAN bus, turn the power switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output Click here.

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notice before proceeding with work Click here.

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

  • DTC check procedure: Turn the power switch on (IG) and wait at least 1.47 seconds.

  • After the repair, perform CAN Bus Check and check that all the ECUs and sensors connected to the CAN communication system are displayed Click here.

Tech Tips


  • Operating the power 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.

  • 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.

PROCEDURE


  1. CHECK SUB BUS 13


    1. A01FRH9E17
      Text in Illustration
      *a

      Component with harness connected

      (No. 12 Junction Connector)
      *b Front view of DLC3

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition Resistance: Malfunction
      T47-3 (CAN+) - T47-2 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω Below 53 Ω: Short in line
      T47-3 (CAN+) - T47-2 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω Higher than 70 Ω: Open in CAN main bus line
      T47-3 (CAN+) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: +B short
      T47-2 (CAN-) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: +B short
      T47-3 (CAN+) - T47-1 (E) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: Ground short
      T47-2 (CAN-) - T47-1 (E) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: Ground short
      Result
      Result Proceed to
      OK A
      NG (Open circuit in CAN main bus line) B
      NG (Short circuit between bus lines) C

      NG


      • Ground short

      • +B short

      		 D

    B

    CHECK FOR OPEN IN CAN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY) Click here

    C

    CHECK FOR SHORT IN CAN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY) Click here

    D

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

    A

  2. CHECK FOR DTC OUTPUT


    1. Clear the DTCs.

    2. Turn the power switch off.

    3. Turn the power switch on (IG) check for DTCs.

      Result
      Result Proceed to
      U1002 is output from driving support ECU assembly (GTS display / Pre-Crash 2) A
      Other DTC is output B

    B

    GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here

    A

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here

  3. CHECK FOR OPEN IN CAN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY)


    1. A01FTMOE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Millimeter Wave Radar Sensor Assembly)

      Disconnect the millimeter wave radar sensor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B12-4 (CA1P) - B12-3 (CA1N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    NG

    CHECK FOR OPEN IN CAN BUS LINES (NO. 7 JUNCTION CONNECTOR) Click here

    OK

    REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here

  4. CHECK FOR OPEN IN CAN BUS LINES (NO. 7 JUNCTION CONNECTOR)


    1. A01FTPME72
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 7 Junction Connector)
      *b to No. 3 Junction Connector
      *c to Millimeter Wave Radar Sensor Assembly

      Reconnect the millimeter wave radar sensor assembly connector.

    2. Disconnect the wire harness connector from the No. 7 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N131-1 (CANH) - N131-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      N131-5 (CANH) - N131-16 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result Proceed to
      OK A
      NG (to Millimeter wave radar sensor assembly main bus line) B
      NG (to No. 3 junction connector main bus line) C

    B

    REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 7 JUNCTION CONNECTOR - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

    C

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

    A

    REPLACE NO. 7 JUNCTION CONNECTOR

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


    1. A01FTPME73
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)
      *b to No. 12 Junction Connector
      *c to No. 7 Junction Connector

      Reconnect the wire harness connector from the No. 7 junction connector.

    2. Disconnect the wire harness connector from the No. 3 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T46-2 (CANH) - T46-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      T46-3 (CANH) - T46-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result Proceed to
      OK A
      NG (to No. 7 junction connector main bus line) B
      NG (to No. 12 junction connector main bus line) C

    B

    REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR)

    C

    CHECK FOR OPEN IN CAN BUS LINES (NO. 12 JUNCTION CONNECTOR) Click here

    A

    REPLACE NO. 3 JUNCTION CONNECTOR

  6. CHECK FOR OPEN IN CAN BUS LINES (NO. 12 JUNCTION CONNECTOR)


    1. A01FURCE39
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 12 Junction Connector)

      Reconnect the wire harness connector from the No. 3 junction connector.

    2. Disconnect the wire harness connector from the No. 12 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T47-3 (CAN+) - T47-2 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 12 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

    OK

    REPLACE NO. 12 JUNCTION CONNECTOR

  7. CHECK FOR SHORT IN CAN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY)


    1. A01FTMOE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Millimeter Wave Radar Sensor Assembly)

      Disconnect the millimeter wave radar sensor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B12-4 (CA1P) - B12-3 (CA1N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    NG

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

    OK

    REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here

  8. CHECK FOR SHORT IN CAN BUS LINES (NO. 7 JUNCTION CONNECTOR)


    1. A01FTPME74
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 7 Junction Connector)
      *b to No. 3 Junction Connector
      *c to Driver Monitor ECU Assembly
      *d to Driving Support ECU Assembly
      *e to Lane Recognition Camera Sensor Assembly
      *f to Millimeter Wave Radar Sensor Assembly

      Reconnect the millimeter wave radar sensor assembly connector.

    2. Disconnect the wire harness connector from the No. 7 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      N131-1 (CANH) - N131-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      N131-2 (CANH) - N131-13 (CANL)*1 Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      N131-3 (CANH) - N131-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      N131-4 (CANH) - N131-15 (CANL)*2 Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      N131-5 (CANH) - N131-16 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      • *1: w/ Driver Monitor Camera

      • *2: w/ Lane-keeping Assist System

      Result
      Result Proceed to
      OK A
      NG (to Millimeter wave radar sensor assembly main bus line) B
      NG (to No. 3 junction connector main bus line) C
      NG (to Driver monitor ECU assembly branch bus line) D
      NG (to Driving support ECU assembly branch bus line)
      NG (to Lane recognition camera sensor assembly branch bus line)

    B

    REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 7 JUNCTION CONNECTOR - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

    C

    CHECK FOR SHORT IN CAN BUS LINES (NO. 3 JUNCTION CONNECTOR) Click here

    D

    CHECK FOR SHORT IN CAN BUS LINES (ECUS) Click here

    A

    REPLACE NO. 7 JUNCTION CONNECTOR

  9. CHECK FOR SHORT IN CAN BUS LINES (NO. 3 JUNCTION CONNECTOR)


    1. A01FUY6E14
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)
      *b to No. 1 Night View ECU
      *c to No. 12 Junction Connector
      *d to No. 7 Junction Connector

      Reconnect the wire harness connector from the No. 7 junction connector.

    2. Disconnect the wire harness connector from the No. 3 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T46-1 (CANH) - T46-12 (CANL)* Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      T46-2 (CANH) - T46-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      T46-3 (CANH) - T46-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      • *: w/ Night View System

      Result
      Result Proceed to
      OK A
      NG (to No. 7 junction connector main bus line) B
      NG (to No. 12 junction connector main bus line) C
      NG (to No. 1 night view ECU branch bus line) D

    B

    REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR)

    C

    CHECK FOR SHORT IN CAN BUS LINES (NO. 12 JUNCTION CONNECTOR) Click here

    D

    CHECK FOR SHORT IN CAN BUS LINES (ECUS) Click here

    A

    REPLACE NO. 3 JUNCTION CONNECTOR

  10. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 JUNCTION CONNECTOR)


    1. A01FURCE39
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 12 Junction Connector)

      Reconnect the wire harness connector from the No. 3 junction connector.

    2. Disconnect the wire harness connector from the No. 12 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T47-3 (CAN+) - T47-2 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 12 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

    OK

    REPLACE NO. 12 JUNCTION CONNECTOR

  11. CHECK FOR SHORT IN CAN BUS LINES (ECUS)


    1. A01FV8IE03
      Text in Illustration
      *a

      Component with harness connected

      (No. 12 Junction Connector)

      Reconnect all wire harness connectors (No. 3 junction connector and No. 7 junction connector).

    2. Disconnect the connector that includes terminals CAN+ and CAN- from the ECU (or sensor) to which the short-circuited branch line is connected Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T47-3 (CAN+) - T47-2 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Tech Tips


      • If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU (or sensor), there may be a short in the ECU (or sensor).

      • If the resistance does not become normal (between 54 and 69 Ω) when the connector is disconnected from the ECU (or sensor), repair or replace the short-circuited branch line or connector.


    NG

    REPAIR OR REPLACE CORRESPONDING ECU WIRE

    OK

    REPLACE CORRESPONDING ECU

  12. CHECK FOR SHORT IN CAN BUS LINE (NO. 7 JUNCTION CONNECTOR)


    1. Disconnect the wire harness connector from the No. 7 junction connector.

      A01FU97E12
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 7 Junction Connector)

      		 *b Front view of DLC3
      *c to No. 3 Junction Connector *d to Driver Monitor ECU Assembly
      *e to Driving Support ECU Assembly *f to Lane Recognition Camera Sensor Assembly
      *g to Millimeter Wave Radar Sensor Assembly - -

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      N131-1 (CANH) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short No. 3 junction connector
      N131-12 (CANL) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      N131-2 (CANH) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short Driver monitor ECU assembly*1
      N131-13 (CANL) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      N131-3 (CANH) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short Driving support ECU assembly
      N131-14 (CANL) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      N131-4 (CANH) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short Lane recognition camera sensor assembly*2
      N131-15 (CANL) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      N131-5 (CANH) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short Millimeter wave radar sensor assembly
      N131-16 (CANL) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      N131-1 (CANH) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short No. 3 junction connector
      N131-12 (CANL) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short
      N131-2 (CANH) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short Driver monitor ECU assembly*1
      N131-13 (CANL) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short
      N131-3 (CANH) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short Driving support ECU assembly
      N131-14 (CANL) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short
      N131-4 (CANH) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short Lane recognition camera sensor assembly*2
      N131-15 (CANL) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short
      N131-5 (CANH) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short Millimeter wave radar sensor assembly
      N131-16 (CANL) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short

      • *1: w/ Driver Monitor Camera

      • *2: w/ Lane-keeping Assist System

      Result
      Result Proceed to
      OK A
      NG (to Millimeter wave radar sensor assembly main bus line) B
      NG (to No. 3 junction connector main bus line) C
      NG (to Driver monitor ECU assembly branch bus line) D
      NG (to Driving support ECU assembly branch bus line)
      NG (to Lane recognition camera sensor assembly branch bus line)

      Tech Tips

      It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 13 inspection.


    B

    CHECK FOR SHORT IN CAN BUS LINE (MILLIMETER WAVE RADAR SENSOR ASSEMBLY) Click here

    C

    CHECK FOR SHORT IN CAN BUS LINE (NO. 3 JUNCTION CONNECTOR) Click here

    D

    CHECK FOR SHORT IN CAN BUS LINE (ECUS) Click here

    A

    REPLACE NO. 7 JUNCTION CONNECTOR

  13. CHECK FOR SHORT IN CAN BUS LINE (MILLIMETER WAVE RADAR SENSOR ASSEMBLY)


    1. A01FV9KE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Millimeter Wave Radar Sensor Assembly)
      *b Front view of DLC3

      Reconnect the wire harness connector from the No. 7 junction connector.

    2. Disconnect the millimeter wave radar sensor assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B12-4 (CA1P) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B12-3 (CA1N) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      B12-4 (CA1P) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      B12-3 (CA1N) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Tech Tips

      It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 13 inspection.


    NG

    REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - NO. 7 JUNCTION CONNECTOR)

    OK

    REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here

  14. CHECK FOR SHORT IN CAN BUS LINE (NO. 3 JUNCTION CONNECTOR)


    1. Reconnect the wire harness connector from the No. 7 junction connector.

      A01FU97E32
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 3 Junction Connector)

      		 *b Front view of DLC3
      *c to No. 1 Night View ECU *d to No. 12 Junction Connector
      *e to No. 7 Junction Connector - -

    2. Disconnect the wire harness connector from the No. 3 Junction Connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      T46-1 (CANH) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short No. 1 night view ECU*
      T46-12 (CANL) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      T46-2 (CANH) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short No. 12 junction connector
      T46-13 (CANL) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      T46-3 (CANH) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short No. 7 junction connector
      T46-14 (CANL) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      T46-1 (CANH) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short No. 1 night view ECU*
      T46-12 (CANL) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short
      T46-2 (CANH) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short No. 12 junction connector
      T46-13 (CANL) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short
      T46-3 (CANH) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short No. 7 junction connector
      T46-14 (CANL) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short

      • *: w/ Night View System

      Result
      Result Proceed to
      OK A
      NG (to No. 7 junction connector main bus line) B
      NG (to No. 12 junction connector main bus line) C
      NG (to No. 1 night view ECU branch bus line) D

      Tech Tips

      It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 13 inspection.


    B

    REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 7 JUNCTION CONNECTOR)

    C

    CHECK FOR SHORT IN CAN BUS LINE (NO. 12 JUNCTION CONNECTOR) Click here

    D

    CHECK FOR SHORT IN CAN BUS LINE (ECUS) Click here

    A

    REPLACE NO. 3 JUNCTION CONNECTOR

  15. CHECK FOR SHORT IN CAN BUS LINE (NO. 12 JUNCTION CONNECTOR)


    1. A01FSWNE12
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to No. 12 Junction Connector)
      *b Front view of DLC3

      Reconnect the wire harness connector from the No. 3 junction connector.

    2. Disconnect the wire harness connector from the No. 12 junction connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T47-3 (CAN+) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      T47-2 (CAN-) - N20-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      T47-3 (CAN+) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      T47-2 (CAN-) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Tech Tips

      It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 13 inspection.


    NG

    REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 12 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

    OK

    REPLACE NO. 12 JUNCTION CONNECTOR

  16. CHECK FOR SHORT IN CAN BUS LINE (ECUS)


    1. A01FRH9E17
      Text in Illustration
      *a

      Component with harness connected

      (No. 12 Junction Connector)
      *b Front view of DLC3

      Reconnect all wire harness connectors (No. 3 junction connector and No. 7 junction connector).

    2. Disconnect the connector that includes terminals CAN+ and CAN- from the ECU to which the bus line shorted to B+ or shorted to GND is connected.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T47-3 (CAN+) - T47-1 (E) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      T47-2 (CAN-) - T47-1 (E) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      T47-3 (CAN+) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      T47-2 (CAN-) - N20-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 13 inspection.

      • If the resistance becomes abnormal when an ECU connector is reconnected, there may be a short in the ECU.


    NG

    REPAIR OR REPLACE CORRESPONDING ECU WIRE

    OK

    REPLACE CORRESPONDING ECU