A2
Test table |
Display group 001 |
Display zones | Explanations | |||||||||
1 | … rpm → Note → Note | Engine speed (from the TD signal -pin 19- directly from the engine control unit). A second mechanic is required to read the values whilst driving → Chapter „Safety precautions“
If no value is displayed:
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2 | … rpm → Note → Note | Gearbox speed (from gearbox speed sender -G38-). A second mechanic is required to read the values whilst driving → Chapter „Safety precautions“
If no value is displayed:
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3 | … % | Accelerator pedal position (CAN bus signal from engine control unit)
If the values are not reached:
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4 | Gear engaged in gearbox whilst driving. A second mechanic is required to read the values → Chapter „Safety precautions“ | |||||||||
1st GEAR … 5th GEAR |
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R-GEAR |
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LG 1-2 |
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LG 3-4 |
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SYNC |
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FAULT |
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Display group 002 |
Display zones | Explanations | |||||||||||||
1 | … V | Load signal (CAN bus signal from engine control unit)
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2 | … V | Signal from clutch travel sender -G162-
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3 | … V | Voltage of terminal 15
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4 | … °C | Coolant temperature (CAN bus signal from engine control unit)
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Display group 003 |
Display zones | Explanations | |||||||||
1 | … rpm | Engine speed → Anchor, measured value block 001, display zone 1 | ||||||||
2 | … rpm | Gearbox speed → Anchor, measured value block 001, display zone 2 | ||||||||
3 | … % → Note | Actual clutch position. The voltage values from the clutch travel sender -G162- ( → Anchor, measured value block 002, display zone 2) are converted in the control unit and output as %-values
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4 | 0 … 100 % → Note | Specified clutch position
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3) | In all clutch control procedures, values must not differ from each other by more than 5 % for longer than 1 second. With greater deviations: Perform basic setting → Chapter and check clutch travel sender -G162-, to do this perform electrical test → Chapter. |
Display group 004 |
Display zones | Explanations | |
1 | XXXXXXXX | Input information 1, 8-digit display (e.g. 00101101), description → Anchor |
2 | XXXXXXXX | Input information 2, 8-digit display (e.g. 00010010), description → Anchor |
3 | XXXXXXXX | Output information 1, 8-digit display (e.g. 01111110), description → Anchor |
4 | XXXXXXXX | Output information 2, 8-digit display (e.g. 11111101), description → Anchor |
Input information 1 in display zone 1 of display group 004 |
Display zone 1 | Explanations | |||||||||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |||||||||
0 | Display is always “0” | |||||||||||||||
0 | Display is always “0” | |||||||||||||||
X |
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1 | Display is always “1” | |||||||||||||||
X |
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X |
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X |
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X |
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Input information 2 in display zone 2 of display group 004 |
Display zone 2 | Explanations | |||||||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |||||||
0 | Ignore | |||||||||||||
0 | Ignore | |||||||||||||
0 | Ignore | |||||||||||||
1 | Ignore | |||||||||||||
0 | Ignore | |||||||||||||
0 |
With deviations:
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1 |
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X |
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4) | The signal of the brake light switch -F-/brake pedal switch -F47- is depicted here (CAN bus signal from engine control unit). For the Start/Stop mode function, however, the signal of the brake pressure switch -F270- is required; this can be checked in the electrical test → Chapter. |
Output information 1 in display zone 3 of display group 004 |
Display zone 3 | Explanations | |||||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |||||
0 | Ignore | |||||||||||
0 | Ignore | |||||||||||
0 | Ignore | |||||||||||
0 |
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X | Ignore | |||||||||||
X |
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X |
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0 | Ignore |
6) | Terminal 30 is switched through via the relay downstream of terminal 50, this supplies power to the starter which must start the engine. |
Output information 2 in display zone 4 of display group 004 |
Display zone 4 | Explanations | |||||||||||||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |||||||||||||
X | Switching status of gear selector valve 3 -N286-. This display must always be the same as the display at item 5
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0 | Ignore | |||||||||||||||||||
0 | Ignore | |||||||||||||||||||
0 | Ignore | |||||||||||||||||||
X | This display must always be the same as the display at item 1 | |||||||||||||||||||
X | Switching status of gear selector valve 4 -N287-. This display must always be the same as the display at item 8
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1 | Ignore | |||||||||||||||||||
X | This display must always be the same as the display at item 6 |
7) | The display in the dash panel insert indicates the gear currently engaged. |
Display group 005 |
Display zones | Explanations | |||||||||||
1 | … rpm | Engine speed → Anchor, measured value block 001, display zone 1 | ||||||||||
2 | … V | Voltage of terminal 15 → Anchor, measured value block 002, display zone 3 | ||||||||||
3 | Selector lever position | |||||||||||
A-STOP |
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A-R |
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A-N |
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A-E |
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T-0 |
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T-MI |
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T-PL |
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??? |
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With deviations and with display “???”:
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4 | … A | Valve for clutch actuator -N255- (in small tolerance range a changing, “jumping” display is not a fault)
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Display group 007 |
Display zones | Explanations | |||||||
1 | … rpm | Engine speed → Anchor, measured value block 001, display zone 1 | ||||||
2 | … rpm | Gearbox speed → Anchor, measured value block 001, display zone 2 | ||||||
3 | … rpm | Calculated gearbox speed calculated from vehicle speed and engaged gear
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4 | … km/h | Vehicle speed signal from dash panel insert
With deviations:
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Display group 008 |
Display zones | Explanations | |
1 | … % | Actual clutch position → Anchor, measured value block 003, display zone 3 |
2 | … | Gear engaged in gearbox → Anchor, measured value block 001, display zone 4 |
3 | … rpm | Engine speed → Anchor, measured value block 001, display zone 1 |
4 | … rpm | Gearbox speed → Anchor, measured value block 001, display zone 2 |
Display group 013 |
Display zones | Explanations | |
1 | … V | Voltage of terminal 15 → Anchor, measured value block 002, display zone 3 |
2 | … A | Valve for clutch actuator -N255- → Anchor, measured value block 005, display zone 4 |
3 | … % | Actual clutch position → Anchor, measured value block 003, display zone 3 |
4 | … % | Specified clutch position → Anchor, measured value block 003, display zone 4 |
Display group 015 |
Display zones | Explanations | |||||||||||||||||||||||||||||||
1 | … V | Specified voltage of potentiometer for selector lever, forwards/backwards -G272-
With deviations:
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2 | … V | Not used | ||||||||||||||||||||||||||||||
3 | … V | Actual voltage of the potentiometer 1 for gear recognition -G239- by shifting the selector lever → Note when the vehicle is stationary with ignition on
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4 | … V | Actual voltage of the potentiometer 2 for gear recognition -G240- (gate recognition) by shifting the selector lever → Note when the vehicle is stationary with ignition on
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8) | The display in the dash panel insert indicates the gear currently engaged. |
Note
The voltage must remain constant whilst driving with every gear engaged (not while shifting). If the voltage value changes (increase or decrease), at the same time check the voltage value of the sender for gearbox hydraulic pressure -G270- in measured value block 020 → Anchor. If the voltage value there drops continuously, check the system for leaks (oil loss), if necessary seal the system. |
Display group 016 |
Display zones | Explanations | |||||||||||||||||||||||||
1 | … % | Specified position of potentiometer for selector lever, forwards/backwards -G272-, converted into %
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With deviations:
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2 | Not used | |||||||||||||||||||||||||
3 | … % | Actual position of potentiometer 1 for gear recognition -G239-, converted into % → Note
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4 | … % | Actual position of potentiometer 2 for gear recognition -G240-, converted into % → Note
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9) | The display in the dash panel insert indicates the gear currently engaged. |
Display group 017 |
Display zones | Explanations | |||
1 | … V | Voltage of terminal 15 → Anchor, measured value block 002, display zone 3 | ||
2 | … A | Valve for clutch actuator -N255- → Anchor, measured value block 005, display zone 4 | ||
3 | … A | Current through gear selector valve 1 -N284-
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4 | … A | Current through gear selector valve 2 -N285-
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Display group 018 |
Display zones | Explanations | |
1 | … | Gear engaged in gearbox → Anchor, measured value block 001, display zone 4 |
2 | Not used | |
3 | … V | Actual voltage of potentiometer 1 for gear recognition -G239- → Anchor, measured value block 015, display zone 3 |
4 | … V | Actual voltage of potentiometer 2 for gear recognition -G240- → Anchor, measured value block 015, display zone 4 |
Display group 019 |
Display zones | Explanations | |||
1 | Gear to be engaged (specified gear) | |||
0 |
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1 … 5 |
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6 |
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251 |
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252 |
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253 |
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254 |
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255 |
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At the latest after 1 second, these displays must be the same as the display in display zone 2. With deviations:
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2 | … | Engaged gear (actual gear) At the latest after 1 second, these displays must be the same as the display in display zone 1. With deviations:
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3 | … % | Accelerator pedal position → Anchor, measured value block 001, display zone 3 | ||
4 | … km/h | Vehicle speed signal → Anchor, measured value block 007, display zone 4 |
Display group 020 |
Display zones | Explanations | |||||||||
1 | … V | Voltage of terminal 15 → Anchor, measured value block 002, display zone 3 | ||||||||
2 | … V | Voltage of terminal 30
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3 | … V | Supply voltage of gearbox sensors (internal)
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4 | … V | Voltage of sender for gearbox hydraulic pressure -G270-
With deviations:
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Display group 021 |
Display zones | Explanations | |
1 | … °C | Slope °C here does not mean the temperature, but the upward or downward slope in per cent (%). This is a calculated value within the control unit |
2 | … % | Hill factor (calculated value within the control unit) |
3 | … % | Sport factor (calculated value within the control unit) |
4 | … % | Accelerator pedal position → Anchor, measured value block 001, display zone 3 |
Display group 022 |
Display zones | Explanations | |
1 | Selector lever position → Anchor, measured value block 005, display zone 3 | |
2 | … V | Specified voltage of potentiometer for selector lever, forwards/backwards -G272- → Anchor, measured value block 015, display zone 1 |
3 | … % | Specified position of potentiometer for selector lever, forwards/backwards -G272-, converted into % → Anchor, measured value block 016, display zone 1 |
4 | … | Ignore |
Display group 025 |
Display zones | Explanations | |||||||
1 | … % | Creep point → Note The creep point is the torque at which the vehicle starts to move or tries to move (handbrake applied)
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2 | … % | Slip point → Note The slip point is the torque at which the clutch begins to slip.
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3 | … | Number of remaining creep point adaptations
With deviations:
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4 | … | Engine torque (filtered, effective torque)
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