B2786
NETWORKING: LIN COMMUNICATION SYSTEM: B2786: No Response from Steering Lock ECU
B2786 - No Response from Steering Lock ECU
DESCRIPTION
This DTC is stored when LIN communication between the certification ECU and steering lock actuator assembly (steering lock ECU) stops for 10 seconds or more.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
* When using the Techstream with the ignition switch off to troubleshoot:
Connect the Techstream to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.
* Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.
HINT
When communication between the steering lock ECU and certification ECU stops, DTC B2785 is also stored.
PROCEDURE
1. CLEAR DTC
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
2. CHECK FOR DTC
(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B2786 is not output.
NG -- CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - STEERING LOCK ECU)
OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting
3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - STEERING LOCK ECU)
(a) Disconnect the F79 certification ECU connector.
(b) Disconnect the F68 steering lock actuator assembly (steering lock ECU) connector.
(c) 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. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BATTERY AND BODY GROUND)
(a) Disconnect the F68 steering lock actuator assembly (steering lock ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)
(a) Temporarily replace the steering lock actuator (steering lock ECU) assembly with a new one Disassembly.
NEXT -- Continue to next step.
6. CLEAR DTC
(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
7. CHECK FOR DTC
(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B2786 is not output.
NG -- REPLACE CERTIFICATION ECU Removal
OK -- END (STEERING LOCK ECU IS DEFECTIVE)