SYSTEM DIAGRAM
Communication Table
Transmitter |
Receiver |
Signal |
Communication Line |
---|---|---|---|
Air conditioning amplifier assembly |
ECM |
A/C idle up request signal |
CAN |
Heater idle up request signal |
|||
PTC heater control request signal* |
|||
Electricity load at low voltage state signal |
|||
Ambient temperature signal |
|||
Main body ECU |
Air conditioning amplifier assembly |
Main body request signal |
|
Combination meter assembly |
Air conditioning amplifier assembly |
Vehicle speed signal |
|
ECM |
Air conditioning amplifier assembly |
Engine coolant temperature signal |
|
Engine speed data |
|||
Engine type information signal |
|||
Heater control assembly |
Air conditioning amplifier assembly |
AUTO operation switch signal |
LIN |
OFF operation switch signal |
|||
A/C switch signal |
|||
Front defroster operation switch signal |
|||
Rear defogger operation switch signal |
|||
Mode operation switch signal |
|||
REC/FRS switch signal |
|||
Set temperature switch signal |
|||
Blower operation switch signal (up, down) |
Terminals Of Ecu
TERMINALS OF ECU
1. TERMINALS OF ECU
Text in Illustration
*a
Component without harness connected
(Skid Control ECU)
-
-
Terminal No. (Symbol)
Terminal Description
...
Short to GND in Immobiliser System Power Source Circuit (B278A)
DESCRIPTION
This DTC is stored when the engine switch power source supply line is open or
shorted.
DTC Code
DTC Detection Condition
Trouble Area
B278A
The engine switch power source supply line i ...