LIN Communication System

NETWORKING: LIN COMMUNICATION SYSTEM: B2786: No Response from Steering Lock ECU
B2786 - No Response from Steering Lock ECU

DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* If the certification ECU (smart key ECU assembly) is replaced, register the key Engine Immobilizer System.
* If the steering lock ECU (steering lock actuator assembly) is replaced, register the ECU code Engine Immobilizer System.

PROCEDURE

1. CHECK FOR DTC

(a) Clear the DTC LIN Communication System.

(b) Recheck for DTC.

OK:

B2786 is not output.

NG -- CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU BATTERY VOLTAGE AND GROUND)

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

2. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU BATTERY VOLTAGE AND GROUND)

(a) Disconnect the J29 ECU connector.





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

Standard Resistance:





Standard Voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE FUSE
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - STEERING LOCK ECU)

(a) Disconnect the P33 ECU connector.





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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

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

NEXT -- Continue to next step.

5. CHECK FOR DTC

(a) Clear the DTC LIN Communication System.

(b) Recheck for DTC.

OK:

B2786 is not output.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

OK -- END (STEERING LOCK ECU IS DEFECTIVE)