DTC B2786 No Response from Steering Lock ECU |
for Preparation Click here
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.DTC No. | DTC Detection Condition | Trouble Area |
B2786 | No communication between the steering lock ECU (steering lock actuator assembly) and the certification ECU (smart key ECU assembly) for more than 10 seconds |
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WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- If the certification ECU (smart key ECU assembly) is replaced, register the keys and ECU communication ID (Click here).
- If the steering lock ECU (steering lock actuator assembly) is replaced, register the ECU code (Click here).
1.CLEAR DTC |
Clear the DTC (Click here).
NEXT | |
2.CHECK FOR DTC |
Recheck for the DTC (Click here).
- OK:
- B2786 is not output.
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OK | ||
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3.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - STEERING LOCK ECU) |
Disconnect the E36 and E39 ECU connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E36-10 (LIN) - E39-5 (LIN) Always Below 1 Ω E36-10 (LIN) - Body ground Always 10 kΩ or higher
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OK | |
4.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU BATTERY VOLTAGE AND GROUND) |
Measure the resistance and voltage according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E39-1 (GND) - Body ground Always Below 1 Ω
- Standard Voltage:
Tester Connection Condition Specified Condition E39-7 (B) - Body ground Always 11 to 14 V
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OK | |
5.REPLACE STEERING LOCK ECU |
Replace the steering lock ECU (steering lock actuator assembly).
NEXT | |
Go to step 4 |
6.CHECK FOR DTC |
Clear the DTC (Click here).
Recheck for the DTC.
- OK:
- B2786 is not output.
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OK | ||
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