Open in CAN Main Bus Line: Procedure

1. Turn the engine switch off.
2. Measure the resistance according to the value(s) in the table below.
   Fig 1: Identifying J21 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Value	Result
   J21-6 (CANH) -J21-14 (CANL)	Engine switch off	108 to 132 Ω	A
   J21-6 (CANH) - J21-14 (CANL)	Engine switch off	133 Ω or higher	B

   NOTE:

   When the measured value is 132 Ω or more and a CAN communication system DTC is output, there may be a fault besides disconnection of the DLC3 branch line. For that reason, troubleshooting should be performed again from "How to Proceed with Troubleshooting". Refer to HOW TO PROCEED WITH TROUBLESHOOTING  after repairing the trouble area.

B → REPAIR OR REPLACE DLC3 BRANCH LINE OR CONNECTOR (CANH, CANL) 

A: Go to next step 

1. Perform "CAN Bus Check" using the Techstream. Refer to DIAGNOSIS SYSTEM .

   Result

   Specified Condition	Proceed to
   "Engine" and "ECT" only are not displayed	A
   "Gateway" only is not displayed	B
   Others	C

C → See step   7 

B → See step   4 

A: Go to next step 

1. Turn the engine switch off.
   Fig 2: Identifying ECM A6 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the ECM connector (A6).
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Value
   A6-14 (CANH) - A6-13 (CANL)	Engine switch off	108 to 132 Ω

NG → REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (ECM - CAN LH JUNCTION CONNECTOR) 

OK → See step   15 

1. Turn the engine switch off.
   Fig 3: Identifying Gateway ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the gateway ECU connector (J76).
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Value
   J76-17 (CA1H) - J76-18 (CA1L)	Engine switch off	108 to 132 Ω

NG → See step   5 

OK → See step   14 

1. Reconnect the gateway ECU connector (J76).

NEXT: Go to next step 

1. Disconnect the CAN main bus line connector (J84) from the CAN RH junction connector B side (w/o earth terminal).
   Fig 4: Identifying J84 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   • Before disconnecting the connector, make a note of where it is connected.
   • Reconnect the connector to its original position.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Value
   J84-1 (CANH) - J84-2 (CANL)	Engine switch off	108 to 132 Ω

NG → REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN RH JUNCTION CONNECTOR - GATEWAY ECU) 

OK → REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN LH JUNCTION CONNECTOR - CAN RH JUNCTION CONNECTOR) 

1. Turn the engine switch off.
   Fig 5: Identifying ECM A6 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the ECM connector (A6).
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Value
   A6-14 (CANH) - A6-13 (CANL)	Engine switch off	108 to 132 Ω

NG → See step   8 

OK → See step   15 

1. Reconnect the ECM connector (A6).

NEXT: Go to next step 

1. Disconnect the gateway ECU connector (J76).
   Fig 6: Identifying Gateway ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Value
   J76-17 (CA1H) - J76-18 (CA1L)	Engine switch off	108 to 132 Ω

NG → See step   10 

OK → See step   14 

1. Reconnect the gateway ECU connector (J76).

NEXT: Go to next step 

1. Disconnect the CAN main bus line connector (J84) from the CAN RH junction connector B side (w/o earth terminal).
   Fig 7: Identifying J84 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   • Before disconnecting the connector, make a note of where it is connected.
   • Reconnect the connector to its original position.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Value
   J84-1 (CANH) - J84-2 (CANL)	Engine switch off	108 to 132 Ω

NG → REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN RH JUNCTION CONNECTOR - GATEWAY ECU) 

OK: Go to next step 

1. Reconnect the CAN main bus line connector (J84) to the CAN RH junction connector B side (w/o earth terminal).

NEXT: Go to next step 

1. Disconnect the CAN main bus line connector (J2) from the CAN LH junction connector A side (w/ earth terminal).
   Fig 8: Identifying J2 Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Value
   J2-1 (CANH) - J2-2 (CANL)	Engine switch off	108 to 132 Ω

NG → REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (ECM - CAN LH JUNCTION CONNECTOR) 

OK → REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN LH JUNCTION CONNECTOR - CAN RH JUNCTION CONNECTOR)