Inspection Procedure

1. Measure the resistance of the DLC3.

   Standard resistance 

   DLC3
   
   

   Tester Connection	Condition	Specified Condition	Proceed to
   D7-6 (CANH) - D7-14 (CANL)	Ignition switch OFF	108 to 132 Ω	A
   D7-6 (CANH) - D7-14 (CANL)	Ignition switch OFF	132 Ω or higher	B

   NOTE: When the measured value is 132 Ω or higher and a CAN communication system diagnostic trouble code is output, there may be a fault besides disconnection of the DLC3 sub bus line. For that reason, troubleshooting should be performed again from HOW TO PROCEED WITH TROUBLESHOOTING  after repairing the trouble area.
   Fig 1: Checking DLC3

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

B: REPAIR OR REPLACE DLC3 SUB BUS LINE OR CONNECTOR (CANH, CANL) 

A: GO TO NEXT STEP 

1. Disconnect the J29 ECM main bus line connector from the junction connector B side.
   NOTE:

   • Before disconnecting the connector, make a note of where it is connected.
   • Reconnect the connector to its original position.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   CAN MAIN BUS LINE FOR DISCONNECTION (FOR ECM)
   
   

   Tester Connection	Condition	Specified Condition
   J29-1 (CANH) - J29-2 (CANL)	Ignition switch OFF	108 to 132 Ω

   Fig 2: Checking CAN Main BUS Line For Disconnection (For ECM)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step   5 

OK: GO TO NEXT STEP 

1. Reconnect the J29 ECM main bus line connector to the junction connector B side.

1. Disconnect the J30 gateway ECU main bus line connector from the junction connector B side.
   NOTE:

   • Before disconnecting the connector, make a note of where it is connected.
   • Reconnect the connector to its original position.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   CAN MAIN BUS LINE FOR DISCONNECTION (FOR GATEWAY ECU)
   
   

   Tester Connection	Condition	Specified Condition
   J30-1 (CANH) - J30-2 (CANL)	Ignition switch OFF	108 to 132 Ω

   Fig 3: Checking CAN Main BUS Line For Disconnection (For Gateway ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step   7 

OK: REPLACE JUNCTION CONNECTOR 

Reconnect the J29 ECM main bus line connector to the junction connector B side.

1. Disconnect the E8 ECM connector.
2. Measure the resistance of the ECM connector.

   Standard resistance 

   ECM
   
   

   Tester Connection	Condition	Specified Condition
   E8-33 (CANH) - E8-34 (CANL)	Ignition switch OFF	108 to 132 Ω

   Fig 4: Checking ECM

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ECM 

OK: REPAIR OR REPLACE ECM MAIN BUS LINE AND CONNECTOR 

1. Reconnect the J30 gateway ECU main bus line connector to the junction connector B side.

1. Disconnect the G4 gateway ECU connector.
2. Measure the resistance of the gateway ECU connector.

   Standard resistance 

   GATEWAY ECU
   
   

   Tester Connection	Condition	Specified Condition
   G4-17 (CA1H) - G4-18 (CA1L)	Ignition switch OFF	108 to 132 Ω

   Fig 5: Checking Gateway ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE GATEWAY ECU 

OK: REPAIR OR REPLACE GATEWAY ECU MAIN BUS LINE AND CONNECTOR