DESCRIPTION
When the certification ECU (smart key ECU assembly) detects an input signal indicating that the vehicle is equipped with an ID code box even though the ID code box is not registered, the certification ECU (smart key ECU assembly) stores this DTC.
DTC Code |
DTC Detection Condition |
Trouble Area |
DTC Output Confirmation Operation |
---|---|---|---|
B278D |
One of the following conditions is met:
|
Misconnection of the ID code box |
Always |
Vehicle Condition when Malfunction Detected |
Fail-safe Operation when Malfunction Detected |
---|---|
Key registration will be prohibited |
- |
DTC Code |
Data List and Active Test |
---|---|
B278D |
- |
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CLEAR DTC |
(a) Clear the DTCs (See page ).
|
2. |
CHECK DTC OUTPUT |
(a) Check for DTCs (See page ).
HINT:
Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
OK:
DTC B278D is not output.
OK | ![]() |
END |
NG | ![]() |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
Inspection
INSPECTION
PROCEDURE
1. INSPECT FUEL PUMP ASSEMBLY
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
1 - 2
20°C (68°F)
0.45 to 0 ...
Terminals Of Ecm
TERMINALS OF ECM
1. ECM
HINT:
The standard voltage between each pair of ECM terminals is shown in the table
below. In the table, first follow the information under "Condition". Look under
"Terminal No. (Symbol)" for the terminals to be inspected. The standard voltage
b ...
Navigation Receiver Assembly Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Navigation Receiver Assembly Communication Stop Mode
Either condition is met:
Communication stop for "Display and Navigation (AVN1)" is indicated
on the "C ...