DTC B2788: IGN Signal Correlation (Steering Lock CM) [11/2021 - ]: Procedure

1. Check the fuse.

   Is the check result OK?

   Result	Proceed to
   Yes	A
   No (Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short circuited.)	B

Result: 

B 

REPLACE FUSE 

1. Replace the fuse.
2. When the replaced fuse is blown immediately, check the power supply circuit for short circuited.

Result: 

A 

See step  2

1. Turn the ignition switch to ON.
2. Using the GTS, check the following items in the [Data Monitor] of [Keyless Access with Push Button Start(Power Supply)].

   Refer to DATA LIST / ACTIVE TEST [11/2021 - ]

   • IGN1/2 relay monitor (drive output)

   Is the display normal according to the ignition switch operation?

   Result	Proceed to
   Yes	A
   No	B

Result: 

B 

See step  5

Result: 

A 

See step  3

1. Turn the ignition switch to OFF.
2. Disconnect the connector from the steering lock actuator assembly.
3. Using a tester, measure the resistance between the steering lock actuator assembly connector and chassis ground.

   Connector & terminal

   F6-1 (GND) - Chassis ground

   Is the resistance less than 1 Ω?

   Result	Proceed to
   Yes	A
   No (Repair or replace the open circuit of harness.)	B

Result: 

B 

REPAIR OR REPLACE THE OPEN CIRCUIT OF HARNESS 

Result: 

A 

See step  4

1. Connect the connector to the steering lock actuator assembly.
2. Using a tester, measure the voltage between the steering lock actuator assembly connector terminals.

   Connector & terminal

   F6-6 (IGN1) (+) - F6-1 (GND) (-)

   Is the voltage 11 - 14 V with IG ON? Is the voltage less than 1 V with IG OFF?

   Result	Proceed to
   Yes (Replace the steering lock actuator assembly.)	A
   No (Check the DC power supply circuit.)	B

Result: 

A 

REPLACE STEERING LOCK ACTUATOR ASSEMBLY. Refer to  DISASSEMBLY [11/2021 - ] 

Result: 

B 

CHECK THE DC POWER SUPPLY CIRCUIT 

1. Turn the ignition switch to ON.
2. Read the DTC of [Keyless Access with Push Button Start(Power Supply)] using the GTS.

   Is DTC B2271 displayed? (Current code)

   Result	Proceed to
   Yes (Perform the diagnosis of DTC B2271.)	A
   No (Replace the smart key ECU assembly.)	B

Result: 

A 

PERFORM THE DIAGNOSIS OF DTC B2271. Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2021 - ] 

Result: 

B 

REPLACE SMART KEY ECU ASSEMBLY. Refer to  REMOVAL [11/2021 - ]