NETWORKING  LIN COMMUNICATION SYSTEM  B2786  No Response from Steering Lock ECU  


DESCRIPTION

This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator assembly) stops for 10 seconds or more.

DTC No. Detection Item DTC Detection Condition Trouble Area
B2786 No Response from Steering Lock ECU No communication between steering lock ECU (steering lock actuator assembly) and certification ECU (smart key ECU assembly) for 10 seconds or more.
·

Steering lock ECU (steering lock actuator assembly)

·

Certification ECU (smart key ECU assembly)

·

Wire harness or connector

·

STRG LOCK fuse



WIRING DIAGRAM

B483021E01
1.854,1.49 2.313,1.688 0.458,0.198 10 false LIN 4.24,1.458 4.698,1.656 0.458,0.198 10 false LIN 4.052,1.313 4.51,1.51 0.458,0.198 10 false 5 2.167,1.292 2.625,1.49 0.458,0.198 10 false 17 4.969,1.063 5.427,1.26 0.458,0.198 10 false B 4.781,1.99 5.24,2.188 0.458,0.198 10 false GND 5.177,0.958 5.635,1.156 0.458,0.198 10 false 7 5.479,1.24 6.656,1.5 1.177,0.26 10 false STRG LOCK 4.927,0.385 6.125,0.625 1.198,0.24 10 false from Battery 3.823,2.385 4.281,2.583 0.458,0.198 10 false E112 3.823,2.552 5.604,3.042 1.781,0.49 10 false Steering Lock ECU (Steering Lock Actuator Assembly) 0.813,2.396 1.271,2.594 0.458,0.198 10 false E110 0.813,2.552 2.625,2.979 1.813,0.427 10 false Certification ECU (Smart Key ECU Assembly) 0.729,3.479 3.083,3.677 2.354,0.198 10 false : LIN Communication Line 5.188,1.885 5.646,2.083 0.458,0.198 10 false 1

CAUTION / NOTICE / HINT

NOTICE:
·

Inspect the fuses for circuits related to this system before performing the following procedure.

·

If the certification ECU (smart key ECU assembly) is replaced, register the keys (refer to Service Bulletin).

·

If the steering lock ECU (steering lock actuator assembly) is replaced, register the ECU code (refer to Service Bulletin).

·

When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.



PROCEDURE

1.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY))
a.

Disconnect the E110 certification ECU (smart key ECU assembly) connector.


b.

Disconnect the E112 steering lock ECU (steering lock actuator assembly) connector.


c.

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

NOTICE:

Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.


Standard Resistance:
Tester Connection Condition Specified Condition
E110-17 (LIN) - E112-5 (LIN) Ignition switch off Below 1 Ω
E110-17 (LIN) - Body ground Ignition switch off 10 kΩ or higher
E112-5 (LIN) - Body ground Ignition switch off 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) - BATTERY, BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) - BATTERY, BODY GROUND)
a.

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

Standard Voltage:
Tester Connection Condition Specified Condition
E112-7 (B) - E112-1 (GND) Always 11 to 14 V



b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E112-1 (GND) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

3.REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)
a.

Replace the steering lock ECU (steering lock actuator assembly).

Click hereSteering>STEERING COLUMN>STEERING COLUMN ASSEMBLY>DISASSEMBLY


Result:
Proceed to
NEXT



NEXT

4.REGISTER ECU CODE REGISTRATION
4.REGISTER ECU CODE REGISTRATION
a.

Register the recognition codes in the ECUs.

HINT:

Refer to Service Bulletin.



Result:
Proceed to
NEXT



NEXT

5.CHECK DTC OUTPUT
5.CHECK DTC OUTPUT
a.

Clear the DTCs.

Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM>DTC CHECK / CLEAR

Body Electrical > Entry&Start > Clear DTCs
50002 125

b.

Recheck for DTCs.

Body Electrical > Entry&Start > Trouble Codes
50001 125
OK:

DTC B2786 is not output.



Result:
Proceed to
OK
NG



OK

END (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) WAS DEFECTIVE)

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)