DESCRIPTION
This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator or upper bracket assembly) stops for 10 seconds or more.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
B278187 | Steering Lock System Missing Message | No communication between certification ECU (smart key ECU assembly) and steering lock ECU (steering lock actuator or upper bracket assembly) for 10 seconds or more. |
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
PROCEDURE
1. | CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Smart Key > Clear DTCs
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2. | CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes Result | Proceed to |
---|---|
DTC B278187 and B278588 are output | A |
Only DTC 278187 is output | B |
DTC B278187 and B278588 are not output | C |
A | GO TO DTC CHART |
C | USE SIMULATION METHOD TO CHECK |
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3. | CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) - AUXILIARY BATTERY AND BODY GROUND) |
(a) Disconnect the H71 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
H71-1 (GND) - Body ground | Always | Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Switch Condition | Specified Condition |
---|---|---|
H71-7 (B) - Body ground | Ignition switch off | 11 to 14 V |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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4. | CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)) |
(a) Disconnect the H46 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the H71 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
H71-5 (LIN) - H46-8 (LIN) | Always | Below 1 Ω |
OK | REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
WARNING
Never allow a person to ride in the luggage compartment/trunk
Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.
Do not drive with the liftgate/trunk lid open