Engine Off Energy Management, Function - GF54.10-S-1050TRA
Model 447, 448
Function requirements, general
- "Engine running" or "Drivetrain operational" signal not set (engine switched off).
Engine OFF energy management, general
Engine OFF energy management ensures the stability of the on-board electrical system and the starting capability of the engine when the vehicle is parked.
This functionality is integrated into the signal acquisition and actuation module (SAM) control unit (N10/1) and serves to extend the service life of the on-board electrical system battery (G1). To this end, active comfort functions or consumers are switched off if necessary.
Engine OFF energy management encompasses the following subfunctions:
- Consumer shutoff
- No-load current management
- Remote charging/jump start
Consumer shutoff
Additional function requirements for consumer shutoff:
- Circuit 15 "ON" or circuit 15R "ON"
The electronic ignition lock control unit (EZS) (N73) transmits the status of circuit 15 via the interior CAN (CAN B) to the signal acquisition and actuation module (SAM) control unit.
- On-board electrical system voltage ≤ 11.8 V
Function sequence for consumer shutoff:
If the on-board electrical system voltage drops to ≤ 11.8 V for 5 s, the signal acquisition and actuation module (SAM) control unit activates the consumer shutoff function and sends a request for consumer output limitation or deactivation over the interior CAN to the corresponding control units.
The signal acquisition and actuation module (SAM) control unit also actuates the following control units:
- The CDI control unit (N3/33) (model 447 with engine 651.9) or the CDI control unit (N3/36) (model 447.6/7 with engine 622) or the ME-SFI control unit (N3/34) (with engine 274) over the interior CAN, electronic ignition lock control unit (EZS) and the chassis CAN (CAN E).
- The left front door control unit (N69/3) over the interior CAN.
- The right front door control unit (N69/4) (over the interior CAN).
- For model 447.8:
The radio (Audio/COMAND) (N87/6) (with CODE EA1 (Audio 20 CD) or CODE EA2 (COMAND Online with 6-disk DVD changer) or CODE EJ8 (Audio 20 USB) or CODE EJ9 (COMAND Online)) over the interior CAN, electronic ignition lock (EZS) control unit, chassis CAN, gateway for user interface CAN (N93/4) and user interface CAN (CAN HMI).
- For model 448.8:
The radio (audio/COMAND) (with code EA2 (COMAND Online with 6-disk DVD changer)) over the interior CAN, electronic ignition lock control unit (EZS), chassis CAN, gateway for user interface CAN and user interface CAN.
- For MODEL 447.6/7:
The radio (Audio) (N87/2) (with CODE EN6 (Audio 10) or CODE EN7 (Audio 15)) over the interior CAN.
- For model 448.7:
The radio (audio) (with code EN7 (Audio 15)) over the interior CAN.
- For model 447 with code H16 (Driver seat heater) over the heater LIN (LIN B28):
- The driver seat heater/ventilation control unit (N32/3)
- The driver seat heater/ventilation control unit (N32/4) (with code ZM3 (RHD version))
- For models 447, 448.8 over the interior CAN:
- The driver seat adjustment control unit with memory (N32/5) (with code SF1 (Electrically adjustable luxury driver's seat))
- The front passenger seat adjustment control unit with memory (N32/6) (with code SF2 (Electrically adjustable front passenger seat))
- For model 447.8 over the interior CAN and CAN decoupler control unit (N/164):
- The seat heater/ventilation control unit, rear seat, 1st seat row, left (N32/12) (with code H05 (Seat climate control in rear passenger compartment, 1st seat row))
- The seat heater/ventilation control unit, rear seat, 1st seat row, right (N3213) (with code H05 (Seat climate control in rear passenger compartment, 1st seat row))
- The seat heater/ventilation control unit, rear seat, 2nd seat row, left (N32/14) (with code H07 (Seat climate control in rear passenger compartment, 2nd seat row))
- The seat heater/ventilation control unit, rear seat, 2nd seat row, right (N32/15) (with code H07 (Seat climate control in rear passenger compartment, 2nd seat row))
- For model 448.8 over the interior CAN and CAN decoupler control unit (N/164):
- The seat adjustment control unit with memory, rear seat, 1st seat row, left (N25/20) (with code U90 (Luxury seat, 1st seat row, left))
- The seat adjustment control unit with memory, rear seat, 1st seat row, right (N25/21) (with code U91 (Luxury seat, 1st seat row, right))
Given constant shutoff conditions, one consumer will be shut off every 5 s in addition to the consumer reduction as part of the engine ON energy management function.
The shutoff sequence is shown in the table below. The list includes those consumers whose output is limited or which are deactivated as part of the engine on energy management function.
| Deactivation sequence | Consumers with limited or no power | Responsible control unit |
|---|---|---|
| 1 | PTC heater booster control unit (N33/4) stage 1 (model 447 with code HZ0 (Electric auxiliary heater)) | Automatic climate control (AAC) control unit (N154) (models 447.8. 448.8 with code HH4 (THERMOTRONIC automatic climate control)) or Air conditioning system control and operating unit (AAC-V & AAC-H) (S98) (models 447.6/7, 448.7) |
| 2 | PTC heater booster control unit stage 2 (model 447 with code HZ0 (Electric auxiliary heater)) | See under cutout point "1" |
| 3 | PTC heater booster control unit stage 3 (model 447 with code HZ0 (Electric auxiliary heater)) | See under cutout point "1" |
| 4 | PTC heater booster control unit stage 4 (model 447 with code HZ0 (Electric auxiliary heater)) | See under cutout point "1" |
| 5 | PTC heater booster control unit stage 5 (model 447 with code HZ0 (Electric auxiliary heater)) | See under cutout point "1" |
| 6 | PTC heater booster control unit stage 6 (model 447 with code HZ0 (Electric auxiliary heater)) | See under cutout point "1" |
| 7 | All seat heating stage 3 (model 447 with code H16 (Seat heater for driver)) | Driver seat heater/ventilation control unit |
| 8 | All seat heating stage 2 (models 447, 448.8) | For model 447: Driver seat heater/ventilation control unit (with code H16 (Seat heater for driver)) Driver seat adjustment control unit with memory (with code SF1 (Electrically adjustable luxury driver's seat)) Front passenger seat adjustment control unit with memory (with code SF2 (Electrically adjustable front passenger seat)). For model 447.8: Seat heater/ventilation control unit, rear seat, 1st seat row, left (with code H05 (Seat climate control in rear passenger compartment, 1st seat row)) Seat heater/ventilation control unit, rear seat, 1st seat row, right (with code H05 (Seat climate control in rear passenger compartment, 1st seat row)) Seat heater/ventilation control unit, rear seat, 2nd seat row, left (with code H07 (Seat climate control in rear passenger compartment, 2nd seat row)) Seat heater/ventilation control unit, rear seat, 2nd seat row, right (with code H07 (Seat climate control in rear passenger compartment, 2nd seat row)). For model 448.8: Driver seat adjustment control unit with memory (with code SF1 (Electrically adjustable luxury driver's seat)) Front passenger seat adjustment control unit with memory (with code SF2 (Electrically adjustable front passenger seat)) Seat adjustment control unit with memory, rear seat, 1st seat row, left (with code U90 (Luxury seat, 1st seat row, left)) Seat adjustment control unit with memory, rear seat, 1st seat row, right (with code U91 (Luxury seat, 1st seat row, right)). |
| 9 | Wiper heater, front (cannot be used for models 447, 448) | - |
| 10 | Mirror heater, left (M21/4r1) and mirror heater, right (M21/5r1) (with code F68 (Outside mirror, electrically adjustable and heated) or code F69 (Rearview mirror, electrically adjustable and heated with integral turn signal light)) | Left front door control unit and Right front door control unit |
| 11 | Steering wheel heater (cannot be used for models 447, 448) | - |
| 12 | Rear window heater (R1) (with code W78 (Window in tailgate or hinged rear door with wipe wash and washer system)) or Rear window heater, left rear-end door (R1/1) and rear window heater, right rear-end door (R1/2) (with code W78 (Window in tailgate or hinged rear door with wipe wash and washer system)) |
Signal acquisition and actuation module (SAM) control unit |
| 13 | Blower motor, rear (A32/4m1), output limitation 50 % (with code HZ7 (Semi-automatically controlled air conditioning system, TEMPMATIC in rear passenger compartment)) | Automatic climate control (AAC) control unit (models 447.8. 448.8 with code HH4 (THERMOTRONIC automatic climate control)) or Air conditioning system control and operating unit (AAC-V & AAC-H) (models 447.6/7, 448.7) |
| 14 | Blower (M9m1), output limitation 70 % | Automatic climate control (AAC) control unit (models 447.8. 448.8 with code HH4 (THERMOTRONIC automatic climate control)) or Air conditioning system control and operating unit (AAC-V & AAC-H) (models 447.6/7, 448.7) |
| 15 | Electric fan (M91), output limitation 50 % (cannot be used for models 447, 448) | - |
| 16 | Load compartment socket, right rear (X58/12) and load compartment socket, left rear (X58/13) | Signal acquisition and actuation module (SAM) control unit |
| 16 | Refrigerator box (A39/2) (cannot be used for models 447, 448) | - |
| 17 | Reserved | - |
| 18 | All seat heating stage 1 (models 447, 448.8) | See under cutout point "8" |
| 19 | Residual heat utilization (with code HH4 (THERMOTRONIC automatic climate control), or code HH9 (Semi-automatically controlled air conditioning system, TEMPMATIC)) | Automatic climate control (AAC) control unit (models 447.8. 448.8 with code HH4 (THERMOTRONIC automatic climate control)) or Air conditioning system control and operating unit (AAC-V & AAC-H) (models 447.6/7, 448.7) |
| 19 | Rear blower motor, 0 % (with code HZ7 (Semi-automatically controlled A/C, TEMPMATIC in rear passenger compartment)) | Automatic climate control (AAC) control unit (models 447.8. 448.8 with code HH4 (THERMOTRONIC automatic climate control)) or Air conditioning system control and operating unit (AAC-V & AAC-H) (models 447.6/7, 448.7) |
| 20 | Stationary heater (with code H12 (Hot-water auxiliary heater) or code HZ1 (Warm-air auxiliary heater)) | Automatic climate control (AAC) control unit (models 447.8. 448.8 with code HH4 (THERMOTRONIC automatic climate control)) or Air conditioning system control and operating unit (AAC-V & AAC-H) (models 447.6/7, 448.7) |
| 20 | Parameterizable special module (PSM) control unit (N26/16) (with code ED5 (Parameterizable special module)) | Parameterizable special module (PSM) control unit |
| 21 | Telematics, audio, telephone, global navigation system (GPS) | Radio (audio) (model 447.6/7 with code EN6 (Audio 10) or code EN7 (Audio 15) or model 448.7 with code EN7 (Audio 15)) or Radio (audio/COMAND) (model 447.8 with code EA1 (Audio 20 CD), code EA2 (COMAND Online with 6-disk DVD changer), code EJ8 (Audio 20 USB) or code EJ9 (COMAND Online)) or model 448.8 with code EA2 (COMAND Online with 6-disk DVD changer)) |
| 22 | Reserved | - |
| 23 | All seat ventilation (models 447.8, 448.8) | For model 447.8: Driver seat heater/ventilation control unit (with code H16 (Seat heater for driver)) Driver seat adjustment control unit with memory (with code SF1 (Electrically adjustable luxury driver's seat)) Front passenger seat adjustment control unit with memory (with code SF2 (Electrically adjustable front passenger seat)) Seat heater/ventilation control unit, rear seat, 1st seat row, left (with code H05 (Seat climate control in rear passenger compartment, 1st seat row)) Seat heater/ventilation control unit, rear seat, 1st seat row, right (with code H05 (Seat climate control in rear passenger compartment, 1st seat row)) Seat heater/ventilation control unit, rear seat, 2nd seat row, left (with code H07 (Seat climate control in rear passenger compartment, 2nd seat row)) Seat heater/ventilation control unit, rear seat, 2nd seat row, right (with code H07 (Seat climate control in rear passenger compartment, 2nd seat row)). For model 448.8: Driver seat adjustment control unit with memory (with code SF1 (Electrically adjustable luxury driver's seat)) Front passenger seat adjustment control unit with memory (with code SF2 (Electrically adjustable front passenger seat)) Seat adjustment control unit with memory, rear seat, 1st seat row, left (with code U90 (Luxury seat, 1st seat row, left)) Seat adjustment control unit with memory, rear seat, 1st seat row, right (with code U91 (Luxury seat, 1st seat row, right)). |
| 23 | Windshield heater (cannot be used for models 447, 448) | - |
Even when the on-board electrical system voltage stabilizes at ≥ 11.8 V, consumer output limitation or deactivation is not canceled. Consumer output limitation or deactivation is only ended after another engine start.
No-load current management
Additional function requirements for no-load current management:
- Transition from circuit 15R to circuit 15C
Function sequence for no-load current management
The quiescent current management switches off consumers at circuit 30g during long idle periods. The no-load current management is integrated into the signal acquisition and actuation module (SAM) control unit.
Quiescent current management however, can accommodate increased power consumption for a specific period after switching off the engine (≤ 75 min). This allows, for example, the radio to be played while the car is being washed. Quiescent current management cyclically measures the voltage and power consumption every 15 min. If an excessively high quiescent current is determined for a specific period, the corresponding relays are opened at the earliest after 75 min, but no later than after 6 h.
After expiration of 6 h, or as soon as the limit value for the on-board electrical system voltage is undershot, thereby compromising the engine's starting capability, the following measures are initiated:
- Activation of quiescent current shutoff
- Corresponding relays opened
Before opening the corresponding relay, the signal acquisition and actuation module (SAM) control unit sends a signal to power down the control units over the interior CAN and the adjacent connections.
The following relays are switched by the signal acquisition and actuation module (SAM) control unit:
- Battery cutoff relay (K57) (model 447 with code E36 (Cutoff relay for additional battery))
- On-board electrical system backup battery relay (K120) (with code MJ8 (ECO start/stop function))
The no-load current management system comprises the following subfunctions:
- No-load current shutoff
- Quiescent current diagnosis
No-load current shutoff
The no-load current shutoff system function comprises the following subfunctions:
- Request consumer shutoff (no-load current switch).
- Switch off consumers.
- Switch-in consumers.
Request consumer shutoff (no-load current switch)
During the transition from circuit 15R to circuit 15C, the vehicle goes into the operating state called "vehicle rest".
The timer counting down to quiescent current shutoff is then started (waiting time 6 h). The no-load current is continuously monitored by the battery sensor. If the quiescent current is too high, the corresponding relays are opened at the earliest after 75 min.
The signal acquisition and actuation module (SAM) control unit reads in the data from the battery sensor over the battery sensor LIN, and evaluates the data. If the on-board electrical system voltage drops during the waiting time to ≤ 11.8 V, the corresponding relays are prematurely actuated.
At ≤ 11.8 V, the battery sensor will go into sleep mode (reduced power consumption).
The following relays are switched by the signal acquisition and actuation module (SAM) control unit:
- Battery cutoff relay (model 447 with code E36 (Cutoff relay for additional battery))
- On-board electrical system backup battery relay (with CODE MJ8 (ECO start/stop function))
The signal acquisition and actuation module (SAM) control unit sends a switch off signal as advance notice over the heater LIN and interior CAN 5 min before opening the corresponding relays. This shutoff signal is relevant to all control units receiving power via circuit 30g.
For model 447, the following control units receive the shut-off signal over the heater LIN:
- Driver seat heater/ventilation control unit (with CODE H16 (Seat heater for driver))
- Driver seat heater/ventilation control unit (with code H16 (Seat heater for driver) and with code ZM3 (Right-hand drive vehicle version))
The following control units receive the shutoff signal via the interior CAN:
- Trailer recognition control unit (AAG) (N28/1) (model 447 with code Q22 (Trailer hitch with non-removable ball head) or with code Q50 (Trailer hitch with removable ball head))
- Driver seat adjustment control unit with memory (models 447, 448.8 with code SF1 (Electrically adjustable luxury driver's seat))
- Front passenger seat adjustment control unit with memory (models 447, 448.8 with code SF1 (Electrically adjustable luxury driver's seat))
- Camera cover (KAB) control unit (N144) (with CODE FR8 (Reversing camera))
- Electronic ignition lock (EZS) control unit
- Automatic climate control (AAC) control unit (models 447.8. 448.8 with code HH4 (THERMOTRONIC automatic climate control))
- Air conditioning system control and operating unit (AAC-V & AAC-H) (models 447.6/7, 448.7)
- Instrument cluster (IC) control unit (A1/1) (models 447.6/7, 448.7)
- Radio (Audio) (MODEL 447.6/7 with CODE EN6 (Audio 10) or CODE EN7 (Audio 15))
In MODEL 447.6/7 the radio (Audio) forwards the shutoff signal over the telematics CAN (CAN A) to the following control units:
- Becker® MAP PILOT control unit (N41) (with CODE E1N (Becker MAP PILOT))
The electronic ignition lock (EZS) control unit forwards the shutoff signal to the following control units:
- Left front reversible belt tensioner (A76) and right front reversible belt tensioner (A76/1) (models 447, 448.8 with code JP1 (PRE-SAFE)) over the chassis CAN
- Tire pressure monitor (TPM) control unit (N88/1) (models 447, 448.8 with code RY2 (Tire pressure monitor)) over the chassis CAN
- DISTRONIC (DTR) control unit (A89) (models 447.8, 448.8 with code ET4 (DISTRONIC PLUS)) over the chassis CAN
- Steering column tube module (MRM) control unit (N80) over the chassis CAN
- Reversing camera (RFK) control unit (B84/3) (MODEL 447.6/7 with CODE FR8 (Reversing camera) and CODE W65 (Liftgate)) over the front end CAN (CAN G)
- Rear-end door reversing camera (RFK) control unit (B84/10) (model 447.6/7 with code FR8 (Reversing camera) and code W50 (Two-wing rear-end door, 180 degrees without window) or with code W54 (Two-wing rear-end door, 270 degrees)) over the front end CAN
- Gateway for user interface CAN (models 447.8, 448.8) over the chassis CAN
In MODEL 447.8, the gateway for the user interface CAN forwards the shutoff signal over the user interface CAN to the following control units:
- Instrument cluster (KI) control unit
- 360° camera control unit (N153) (with CODE JS1 (360° camera))
- Reversing camera (RFK) control unit (B84/5) (with CODE FR8 (Reversing camera))
- Radio (Audio/COMAND) (with CODE EA1 (Audio 20 CD) or CODE EA2 (COMAND Online with 6-disk DVD changer) or CODE EJ8 (Audio 20 USB) or CODE EJ9 (COMAND Online))
On model 448.8, the gateway for the user interface CAN forwards the shutoff signal over the user interface CAN to the following control units:
- Instrument cluster (KI) control unit
- 360° camera control unit (N153) (with CODE JS1 (360° camera))
- Reversing camera (RFK) control unit (B84/5) (with CODE FR8 (Reversing camera))
- Radio (Audio/COMAND) (with CODE EA2 (COMAND Online with 6-disk DVD changer))
In MODEL 447.8 (with CODE EA1 (Audio 20 CD) or CODE EA2 (COMAND Online with 6-disk DVD changer) or CODE EJ8 (Audio 20 USB) or CODE EJ9 (COMAND Online)), the radio (Audio/COMAND) forwards the shutoff signal over the telematics CAN to the following control units:
- Touchpad control unit (A40/5) (with CODE EA1 (Audio 20 CD) or CODE EA2 (COMAND Online with 6-disk DVD changer) or CODE EJ9 (COMAND Online))
- Central operating unit (ZBE) control unit (A40)
- Audio/COMAND display control unit (A40/8)
On model 448.8 (with code EA2 (COMAND Online with 6-disk DVD changer)), the radio (audio/COMAND) forwards the shutoff signal over the telematics CAN to the following control units:
- Touchpad control unit (A40/5)
- Central operating unit (ZBE) control unit (A40)
- Audio/COMAND display control unit (A40/8)
On model 447.8 (with code EA1 (Audio 20 CD) or code EA2 (COMAND Online with 6-disk DVD changer) or code EJ8 (Audio 20 USB) or CODE EJ9 (COMAND Online)), the radio (Audio/COMAND) forwards the shutoff signal over MOST (Media Oriented System Transport) to the following control units:
- Sound system amplifier control unit (N40/3) (with CODE E65 (Burmester surround sound system))
- Digital Audio Broadcasting (DAB) control unit (N160) (with CODE E1D (Digital radio))
On model 448.8 (with code EA2 (COMAND Online with 6-disk DVD changer)), the radio (audio/COMAN D) forwards the shutoff signal over MOST (Media Oriented System Transport) to the following control unit:
- Sound system amplifier control unit (N40/3) (with CODE E65 (Burmester surround sound system))
If a CAN is in "sleep mode" during signal transmission, the corresponding control units are woken up. The control units will then prepare themselves for power supply shutoff. Within 5 min, these control units will go into "power-down mode" (decentralized power management).
Switch off consumers
After "power down mode" is achieved, the quiescent current management opens the corresponding relay provided no closing causing event has occurred in the meantime. The signal acquisition and actuation module (SAM) control unit sends the switch status of the corresponding relay over the interior CAN to all the relevant control units.
Detailed information on the signal flow is given in the chapter "Function sequence for requesting consumer shutoff (no-load current switch)".
The following relays are switched by the signal acquisition and actuation module (SAM) control unit:
- Battery cutoff relay (model 447 with code E36 (Cutoff relay for additional battery))
- On-board electrical system backup battery relay (with CODE MJ8 (ECO start/stop function))
Switch-in consumers
The quiescent current management closes the corresponding relay as soon as a control unit is activated. All the functions are then available again. The relays are not opened until the waiting time of 6 h has expired or the on-board electrical system voltage has dropped to ≤ 11.8 V. If the signal acquisition and actuation module (SAM) control unit receives a wake-up signal, the no-load current management closes the corresponding relay and signals over the interior CAN that the wake-up conditions for the control units are enabled again. Closing the relay switches in the power supply over circuit 30g again.
Detailed information on the signal flow is given in the chapter "Function sequence for requesting consumer shutoff (no-load current switch)".
The following activities will trigger the closure of the corresponding relays:
- Switching on of circuit 15R
- Unlocking or opening of a door, a rear-end door or the tailgate or switching on of circuit: 15C
- Switching on of the hazard warning system, the standing or parking lights or the signaling system of special-purpose vehicles
- Activation of anti-theft alarm system (model 447 with code FY1 (Anti-Theft Protection Package)).
- Activation of stationary heater (with code H12 (Auxiliary water heater) or code HZ1 (Warm-air auxiliary heater)).
The following relays are switched by the signal acquisition and actuation module (SAM) control unit:
- Battery cutoff relay (model 447 with code E36 (Cutoff relay for additional battery))
- On-board electrical system backup battery relay (with CODE MJ8 (ECO start/stop function))
Quiescent current diagnosis
No-load current diagnosis records data to help troubleshoot possible fault profiles.
The no-load current diagnosis function comprises the following subfunctions:
- Activate quiescent current diagnosis.
- Cancel/end quiescent current diagnosis.
Activate quiescent current diagnosis
Additional function requirements for activating no-load current
- Circuit 15R "OFF"
The circuit 15 status is transmitted by the electronic ignition lock (EZS) control unit over the interior CAN to the signal acquisition and actuation module (SAM) control unit.
The battery sensor starts the no-load current diagnosis via the battery sensor LIN if one of the following events occurs:
- Increased quiescent current following expiration of tolerance time of 75 min
- On-board electrical system voltage undershoots limit and there has been a change in the kilometer reading since the last fault roll entry caused by undervoltage (also before expiration of tolerance time of 75 min).
The first wake-up event causes an entry to be made in the quiescent current fault roll. Following this, the no-load current is cyclically checked. The values will be updated if there are significant changes or if the no-load current diagnosis is canceled.
The following data are stored in nonvolatile memory in the no-load current fault roll:
- No-load current diagnosis upon occurrence of wake-up event
- Maximum no-load current during no-load current fault phase
- Minimum no-load current during no-load current fault phase
- Voltage of on-board electrical system battery upon occurrence of wake-up event
- Voltage of on-board electrical system battery at end of no-load current fault phase
- Duration of stationary phase (in minutes)
- Kilometer reading
- Consumer status
- Outside temperature
- Date and time of fault entry
As long as no-load current diagnosis is active, each additional battery sensor wake-up event will cause the data record to be updated.
Cancel/end quiescent current diagnosis
Additional function requirements for canceling/ending no-load current diagnosis
- Circuit 15R "ON"
- Drop below limit value for on-board electrical system voltage
The circuit 15 status is transmitted by the electronic ignition lock (EZS) control unit over the interior CAN to the signal acquisition and actuation module (SAM) control unit.
The quiescent current diagnosis is canceled when the limit value for the on-board electrical system voltage is undershot. The battery sensor will discontinue no-load current monitoring in order to minimize electricity consumption. Once this happens, no further entries will be added to the fault memory.
Remote charging/jump start
If the on-board electrical system battery does not have enough capacity to start the engine, the on-board electrical system battery must be charged or a jump start carried out.
One of the front doors must be opened during a jump start procedure or during any testing in the workshop to enable the alternator management to change to the jump starting mode or the workshop mode and the alternator voltage to be increased to 14.3 V.
| Electrical function schematic for consumer shutoff | Model 448.8 | PE54.10-S-2066-97VDA | |
| Model 448.7 | PE54.10-S-2066-97VDB | ||
| Model 447.6/7 | PE54.10-S-2066-97TRB | ||
| Model 447.8 | PE54.10-S-2066-97TRA | ||
| Electrical function schematic for no-load current management | Model 448.7 | PE54.10-S-2074-97VDB | |
| Model 448.8 | PE54.10-S-2074-97VDA | ||
| Model 447.6/7 | PE54.10-S-2074-97TRB | ||
| Model 447.8 | PE54.10-S-2074-97TRA | ||
| Overview of energy management system components | Model 447.6 Model 447.7 except code ZH6 (Marco Polo ACTIVITY) Model 447.8 except code ZK7 (Equipment line MARCO POLO) Model 448 |
GF54.10-S-9990TRA |