DTC B1730: Central Gateway Control Module Ignition / Accessory Power [11/2021 - ]: Procedure

1. Turn the ignition switch to ON.
2. Using the GTS, perform the DTC clear of [Central Gateway].

   Body Electrical > Central Gateway > Clear DTCs 

3. Read the DTC of [Central Gateway] using the GTS.

   Body Electrical > Central Gateway > Trouble Codes 

   Is DTC B1730 displayed? (Current code)

   Result	Proceed to
   Yes	A
   No	B

Result: 

B 

See step  4

Result: 

A 

See step  2

1. Turn the ignition switch to off.
2. Disconnect the F5 central gateway ECU (network gateway ECU) connector.
3. Turn the ignition switch to ACC.
4. Measure the voltage between central gateway ECU (network gateway ECU) connector and chassis ground.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F5-2 (ACC) - Chassis ground	Ignition switch ACC	9 V or higher

   Is the voltage 9 V or higher?

   Result	Proceed to
   Yes	A
   No	B

Result: 

A 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [11/2021 - ] 

Result: 

B 

See step  3

1. Turn the ignition switch to ACC.
2. Measure the voltage between ECU ACC terminal and chassis ground. (When ACC is ON)

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   ECU ACC-2 - Chassis ground	Ignition switch ACC	9 V or higher

   Is the voltage 9 V or higher?

   Result	Proceed to
   Yes	A
   No	B

Result: 

A 

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

Result: 

B 

CHECK ACC RELAY CIRCUIT 

1. Check ACC relay circuit.

1. Turn the ignition switch to off.
2. Check the conditions of central gateway ECU (network gateway ECU) connector connection, and check the terminals for contact pressure, deformation, and intrusion of water or foreign substance.

   Is there looseness at the connector connection, or any poor contact at the relevant terminals?

   Result	Proceed to
   Yes	A
   No	B

Result: 

A 

CONNECT THE CONNECTOR SECURELY. OR REPAIR THE POOR CONTACT OF CONNECTOR. 

1. Connect the connector securely. Or repair the poor contact of connector.

Result: 

B 

See step  5

1. Check the connecting condition of connector in relay and fuse box (F/B) and check the relevant terminals for contact pressure, deformation and intrusion of water or foreign matter.

   Is there looseness at the connector connection, or any poor contact at the relevant terminals?

   Result	Proceed to
   Yes	A
   No	B

Result: 

A 

CONNECT THE CONNECTOR SECURELY. OR REPAIR THE POOR CONTACT OF CONNECTOR. 

1. Connect the connector securely. Or repair the poor contact of connector.

Result: 

B 

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - RELAY and FUSE BOX (F/B)) 

1. Check the conditions of relay and fuse box (F/B) connector connection from the battery, and check the terminals for contact pressure, deformation, and intrusion of water or foreign substance.