Messages
| Messages |
Below is a summary of the messages which are sent out by all the car's systems that are connected to a bus. It also shows which systems use the transmitted information. The purpose of the summary is to help you gain an understanding of the car's functional relationships, which is a fundamental prerequisite for rapid fault diagnosis.
DICE
| DICE transmits | Values | Used by | The value depends on the following sensor input, signal or function |
|
A/C
|
ON/OFF
|
ECM
|
A/C (bus from ACC), coolant temperature (bus from ECM), A/C pressure and evaporator temperature
|
|
A/C pressure
|
0 -30 bar
|
ECM
|
A/C pressure sensor
|
|
Current consumption
|
0-255 A
|
ECM
|
Control module activation of the relay outputs for the radiator fans and the electrically heated rear window
|
|
Position lights
|
ON/OFF
|
SID
|
Control module activation of the relay outputs for the headlamp relay
|
|
Electrically heated rear window
|
ON/OFF
|
ACC
|
Control module activation of the relay output for the electrically heated rear window
|
|
Rear fog light broken
|
YES/NO
|
SID
|
Control module current measurement of output to lamp
|
|
LH direction indicators
|
ON/OFF
|
MIU, SID
|
Control module activation of output to lamps
|
|
RH direction indicators
|
ON/OFF
|
MIU, SID
|
Control module activation of output to lamps
|
|
Rear fog light
|
ON/OFF
|
MIU
|
Control module activation of output to fog light
|
|
Sound
|
Sound information
|
SID
|
Control module programming and seat-belt buckle switches, driver's door or passenger's door open (bus from TWICE)
|
|
Ignition +B
|
ON/OFF
|
Twice, Audio system
|
Ignition switch
|
|
Ignition +15
|
ON/OFF
|
--
|
Ignition switch
|
|
Ignition +54
|
ON/OFF
|
TWICE
|
Ignition switch
|
|
Ignition +50
|
ON/OFF
|
TWICE, ACC, Trionic T7
|
+15 present but not +54
|
|
VIN
|
Vehicle Identification Number
|
Audio
|
Control module programming
|
|
Idling speed increase
|
ON/OFF
|
Trionic T7
|
Radiator fan High has been activated once during the trip.
|
|
Reverse gear
|
ON/OFF
|
Trionic T7
|
Reversing light switch
|
|
Diagnostics communication
|
Answer to enquiry from diagnostics instrument
|
DICE/diagnostic tool
|
Control module should be live and the bus leads intact
|
TWICE
| TWICE sends | Values | Used by | The value depends on the following sensor input, signal or function |
|
LH rear light broken
|
YES/NO
|
SID
|
Control module current measurement of output to lamps
|
|
RH rear light broken
|
YES/NO
|
SID
|
Control module current measurement of output to lamps
|
|
LH rear light
|
ON/OFF
|
DICE
|
Control module input supplied with current from lights switch
|
|
RH rear light
|
ON/OFF
|
DICE
|
Control module input supplied with current from lights switch
|
|
LH brake light broken
|
YES/NO
|
SID
|
Control module current measurement of output to lamp
|
|
RH brake light broken
|
YES/NO
|
SID
|
Control module current measurement of output to lamp
|
|
High-level brake light broken
|
YES/NO
|
SID
|
Control module current measurement of output to lamp
|
|
Brake lights
|
ON/OFF
|
SID, TCM (cars with Trionic T7 engine management system)
|
Brake light switch
|
|
Sound
|
Sound information
|
SID
|
In connection with text message
|
|
Driver's door
|
OPEN/CLOSED
|
MIU,PSM
DICE |
Door switch
|
|
Passenger door
|
OPEN/CLOSED
|
MIU,PSM
DICE |
Door switch
|
|
LH rear door
|
OPEN/CLOSED
|
MIU, DICE
|
Door switch
|
|
RH rear door
|
OPEN/CLOSED
|
MIU, DICE
|
Door switch
|
|
Boot lid
|
OPEN/CLOSED
|
MIU, DICE, STC
|
Lid switch
|
|
Horn
|
0: 6: 42 ms
|
SID
|
Anti-theft alarm function and central locking system function
|
|
Hazard flashers
|
ON/OFF
|
DICE
|
Anti-theft alarm function and central locking system function
|
|
Text message
|
Text information
|
SID
|
Anti-theft alarm function and central locking system function
|
|
Steering wheel location
|
LHD/RHD
|
ACC, MIU
|
Control module programming
|
|
Key correct
|
ON/OFF
|
Audio, Trionic
|
Immobilizer function
|
|
Immobilizer
|
ON/OFF
|
Trionic
|
Immobilizer function
|
|
Central locking system
|
UNLOCKED/LOCKED
|
DICE
|
Central locking system function
|
|
Diagnostics communication
|
Answer to enquiry from diagnostics instrument
|
DICE/diagnostic tool
|
Control module should be live and the bus leads intact
|
ACC
| ACC sends | Values | Used by | The value depends on the following sensor input, signal or function |
|
Text message
|
Text information
|
SID
|
Extended user programming, demonstration of air balance function
|
|
Sound
|
Sound information
|
SID
|
In connection with text message
|
|
A/C
|
ON/OFF
|
DICE
|
AUTO selected and outside temperature (bus from SID)
|
|
Electrically heated rear window
|
ON/OFF
|
DICE
|
Button on dashboard
|
|
Diagnostics communication
|
Answer to enquiry from diagnostics instrument
|
DICE/diagnostic tool
|
Control module should be live and the bus leads intact
|
Audio system, main unit
| Audio sends | Values | Used by | The value depends on the following sensor input, signal or function |
|
Time RDS
|
Hours, Minutes, Seconds
|
SID
|
RDS reception
|
|
Date RDS
|
0 -31
|
SID
|
RDS reception
|
|
Month RDS
|
January...December
|
SID
|
RDS reception
|
|
Sound
|
Sound information
|
SID
|
Button pressed on dashboard
|
|
Text message
|
Text information
|
SID
|
Audio display
|
|
CD changer control
|
Information for controlling the CD changer
|
CD changer
|
Buttons on dashboard
|
|
Diagnostics communication
|
Answer to enquiry from diagnostics instrument
|
DICE/diagnostic tool
|
Control module should be live and the bus leads intact
|
CDC
| CDC sends | Values | Used by | The value depends on the following sensor input, signal or function |
|
CD changer information
|
Current settings
|
Audio
|
Information on a CD and its location
|
|
Diagnostics communication
|
Answer to enquiry from diagnostics instrument
|
DICE/diagnostic tool
|
Control module should be live and the bus leads intact
|
MIU
| MIU sends | Values | Used by | The value depends on the following sensor input, signal or function |
|
Vehicle speed
|
km/h, mph
|
DICE, SID, ACC, Audio TWICE, STC, ECM
|
Wheel speed rear right (wire from ABS, bus from TC/ABS)
|
|
Sound
|
Sound information
|
SID
|
Control module activation of central warning lamp or info display lamp
|
|
Stop for fuel (cars with PSG 16 engine management system)
|
ON/OFF
|
SID
|
When fuel level drops below 3 litres, ON is sent
|
|
Fuel consumed since start
|
0-65535 ml
|
SID
|
Bus from ECM. The reading is corrected by an adjustment factor in the MIU. The factor can be adjusted with the diagnostic tool.
|
|
Fuel level
|
litres
|
SID, ACC, Trionic T7
|
Tank sensor, control module adjustment
|
|
Odometer reading
|
km, miles
|
SID
|
Display value
|
|
Identification number
|
--
|
TWICE
|
Value created in MIU when immobilizer code is programmed in TWICE
|
|
Diagnostics communication
|
Answer to enquiry from diagnostics instrument
|
DICE/diagnostic tool
|
Control module should be live and the bus leads intact
|
SID
| SID sends | Values | Used by | The value depends on the following sensor input, signal or function |
|
Info Disp Lamp
|
ON/OFF
|
MIU
|
In connection with text message
|
|
Unit
|
Metric, Imperial ( F), Imperial ( C), US
|
ACC
|
The unit selected with the buttons
|
|
Language
|
English, German, French, Spanish, Swedish, Italian
|
ACC
|
The language selected with the buttons
|
|
Steering wheel controls
|
Seek >>, Seek <<, Vol +, Vol -, NXT, SRC
|
Audio
|
Button control module input
|
|
Rheostat level
|
0 -100 %
|
Audio, ACC, DICE, MIU
|
Rheostat control module input
|
|
Rheostat Night Panel
|
0 -100 %
|
Audio, ACC, DICE, MIU
|
Rheostat control module input reduced internally by a fixed value
|
|
Night Panel
|
ON/OFF
|
Audio, ACC, DICE, MIU
|
Button
|
|
SID buttons
|
Clear, Set, Trip Down, Trip Up, Night Panel
|
TWICE, MIU
|
Buttons
|
|
Display lighting
|
0 -100 %
|
Audio, ACC, MIU
|
Rheostat control module input or light sensor, highest value
|
|
Light intensity in cabin
|
Lux
|
MIU
|
Light sensor
|
|
Time engine switched off
|
Minutes
|
ACC
|
+ 15
|
|
Outdoor temperature
|
°C
|
ACC, DICE, TWICE
|
Outside temperature sensor, control module adjustment
|
|
Diagnostics communication
|
Answer to enquiry from diagnostics instrument
|
DICE/diagnostic tool
|
Control module should be live and the bus leads intact
|
STC
| STC sends | Values | Used by | The value depends on the following sensor input, signal or function |
|
Sound
|
Sound information
|
SID
|
On text message and when the roof has finished it cycle
|
|
Text message
|
Text information
|
SID
|
On fault
|
|
Soft top position
|
Raised, in motion, lowered
|
ACC, TWICE
|
Switches on top of windscreen frame, Soft top cover switch.
|
|
Diagnostics communication
|
Answer to enquiry from diagnostics instrument
|
DICE/diagnostic tool
|
Control module should be live and the bus leads intact
|
PSM
| PSM sends | Values | Used by | The value depends on the following sensor input, signal or function |
|
Sound
|
Sound information
|
SID
|
When seat setting stored
|
|
Diagnostics communication
|
Answer to enquiry from diagnostics instrument
|
DICE/diagnostic tool
|
Control module should be live and the bus leads intact
|
PSG 16
| PSG 16 sends | Values | Used by | The value depends on the following sensor input, signal or function |
|
Check Engine lamp
|
ON/OFF
|
MIU
|
Internal diagnosis
|
|
CRUISE lamp
|
ON/OFF
|
MIU
|
Cruise Control function
|
|
Fuel consumed since start
|
0-65535 ml
|
MIU
|
Fuel injection function
|
|
Engine has started
|
ON/OFF
|
ACC, DICE, SID
|
Crankshaft position sensor
|
|
Engine speed
|
0-6000 rpm
|
MIU, ACC
|
Crankshaft position sensor
|
|
Coolant temperature
|
-50 -200°C
|
MIU, DICE, ACC
|
Coolant temperature sensor
|
|
Glow indicator lamp
|
ON/OFF
|
MIU
|
Glow function
|
|
Oil level
|
Low
|
SID
|
Oil level sensor
|
|
Immobilizer
|
Code
|
TWICE
|
Immobilizer function
|
|
Diagnostics communication
|
Answer to enquiry from diagnostics instrument
|
DICE/diagnostic tool
|
Control module should be live and the bus leads intact
|
Trionic T7
| Trionic T7 transmits | Values | Used by | The value depends on the following sensor input, signal or function |
|
Check Engine lamp
|
ON/OFF
|
MIU
|
Internal diagnosis
|
|
Kick Down
|
ON/OFF
|
TCM, TC/ABS
|
Pedal position sensor 1
|
|
Shift Up Lamp (US/CA only)
|
ON/OFF
|
MIU
|
Wheel speed front right (lead from ABS)
|
|
CRUISE lamp
|
ON/OFF
|
MIU
|
Cruise Control function
|
|
TURBO gauge
|
0-255, no unit
|
MIU
|
Current air mass per combustion
|
|
Fuel consumed since start
|
0-65535 ml
|
MIU, SID
|
Fuel injection function
|
|
Engine has started
|
ON/OFF
|
ACC, DICE, TC/ABS
|
Crankshaft position sensor
|
|
Engine torque
|
-100-400 Nm
|
TCM, TC/ABS
|
Mass air flow sensor
|
|
Engine speed
|
0-7000 rpm
|
MIU, ACC
|
Crankshaft position sensor
|
|
Accelerator Pedal Position
|
0-100%
|
TCM, TC/ABS
|
Requested air mass per combustion
|
|
Coolant temperature
|
-40 - 215°C
|
MIU, DICE, ACC
|
Coolant temperature sensor
|
|
Diagnostics communication
|
Answer to enquiry from diagnostics instrument
|
DICE/diagnostic tool
|
Control module should be live and the bus leads intact
|
TCM (cars with Trionic T7 engine management system)
| TCM sends | Values | Used by | The value depends on the following sensor input, signal or function |
|
Selector lever Position
|
P, R, N, D, 3, 2, 1
|
MIU, Trionic, TC/ABS
|
Selector lever position sensor.
|
|
CHECK GEARBOX Lamp
|
ON/OFF
|
MIU
|
Internal diagnosis
|
|
SPORT
|
ON/OFF
|
MIU, Trionic
|
The button and oil temperature sensor and not limp-home or WINTER
|
|
WINTER Lamp
|
ON/OFF
|
MIU
|
The button and oil temperature sensor and not limp-home
|
|
Maximum Permitted Engine Torque
|
Nm
|
Trionic
|
Shift function
|
|
Text message
|
Text information
|
SID
|
Oil temperature
|
|
Diagnostics communication
|
Answer to enquiry from diagnostics instrument
|
DICE/diagnostic tool
|
Control module should be live and the bus leads intact
|
TC/ABS
| TC/ABS sends | Values | Used by | The value depends on the following sensor input, signal or function |
|
Wheel speed FR
|
0-300 km/h
|
ECM
|
Wheel speed sensor FR
|
|
Wheel speed FL
|
0-300 km/h
|
Not used
|
Wheel speed sensor FL
|
|
Wheel speed RL
|
0-300 km/h
|
ECM, MIU, DICE, Audio, TWICE
|
Wheel speed sensor RL
|
|
Wheel speed RR
|
0-300 km/h
|
MIU
|
Wheel speed sensor RR
|
|
ABS lamp
|
ON/OFF
|
MIU
|
Internal diagnostics
|
|
TCS OFF lamp
|
ON/OFF
|
MIU
|
Switch, internal diagnostics
|
|
TCS lamp
|
ON/OFF
|
MIU
|
Traction Control active
|
|
Request for engine torque
|
-100 - 400 Nm
|
Trionic
|
Traction Control
|
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