Check CAN Communication Connection [12/2022 - 12/2023]: Procedure

1. Connect the GTS to the DLC3 of another vehicle.
2. Turn the ignition switch to ON.
3. Turn the GTS on.
4. Check that the GTS and ECUs can communicate with the ignition switch ON.

   HINT: 

   • ECUs and sensors are not displayed on the "Communication Bus Check" screen when the GTS cannot communicate with the vehicle.
   • If communication between the GTS and ECUs is not possible, either the GTS or vehicle has a malfunction.
   • If communication between the GTS and ECUs is still not possible even when the GTS is connected to another vehicle, the GTS has a malfunction. Perform the self tests described in the GTS operator's manual. (The GTS may be malfunctioning or its battery may be discharged.)

   Result

   Result	Proceed to
   OK (Communication between the GTS and the vehicle is not possible but communication is possible when connected to another vehicle.)	A
   NG (Communication is not possible between the GTS and the vehicle, nor between the GTS and another vehicle.)	B

Result: 

B 

REFER TO GTS OPERATOR'S MANUAL 

Result: 

A 

See step  2

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   D20-16 (BAT) - Body ground	Ignition switch off	11 to 14 V

2. Disconnect the cable from the negative (-) auxiliary battery terminal.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D20-4 (CG) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 POWER SOURCE CIRCUIT) 

Result: 

OK 

See step  3

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D20-6 (CANH) - D20-14 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	Below 70 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  7

Result: 

OK 

See step  4

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D20-6 (CANH) - D20-14 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	54 Ω or higher
   D20-6 (CANH) - D20-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
   D20-14 (CANL) - D20-4 (CG)
   D20-6 (CANH) - D20-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
   D20-14 (CANL) - D20-16 (BAT)

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  6

Result: 

OK 

See step  5

1. Disconnect the D120 central gateway ECU (network gateway ECU) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D120-22 (GND) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

3. Reconnect the cable to the negative (-) auxiliary battery terminal.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   D120-1 (BATT) - Body ground	Ignition switch off	11 to 14 V
   D120-2 (ACC) - Body ground	Ignition switch ACC	11 to 14 V
   	Ignition switch off	Below 1 V
   D120-20 (IG2) - Body ground	Ignition switch ON	11 to 14 V
   	Ignition switch off	Below 1 V
   D120-19 (IG1)- Body ground	Ignition switch ON	11 to 14 V
   	Ignition switch off	Below 1 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [11/2020 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the D120 central gateway ECU (network gateway ECU) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D120-16 (CA6H) - D120-17 (CA6L)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher
   D120-16 (CA6H) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
   D120-17 (CA6L) - Body ground
   D120-16 (CA6H) - +B	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
   D120-17 (CA6L) - +B

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [11/2020 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - DLC3) 

1. Disconnect the D120 central gateway ECU (network gateway ECU) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D120-16 (CA6H) - D20-6 (CANH)	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω
   D120-16 (CA6H) - D20-14 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPAIR OR REPLACE HARNESS OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - DLC3) 

Result: 

NG 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) (NETWORK GATEWAY ECU). Refer to  REMOVAL [11/2020 - ]