AWD disable message

[Mickalo]

Had a message pop this morning "AWD temporarily disabled" then about 5 minutes later displayed AWD restored what would trigger this ? 2019 edge Titanium can these sub zero temps we've been having cause this.

 

TIA

[Wubster100]

Heat Protection - Power Transfer Unit

 

During excessive use or when towing a trailer, the AWD system may implement a heat protection mode to protect the power transfer unit from damage. Using the input from power transfer unit temperature sensors, the AWD module performs calculations to determine the demand for use of the heat protection mode. The AWD system then reduces the commanded torque being applied by the RDU to the rear axles, and/or disconnects the power transfer unit dog clutch. Once the maximum temperature limit is reached, AWD mode only is commanded and the AWD temporarily disabled or AWD OFF message is displayed in the IPC.

 

Heat Protection - Rear Drive Unit (RDU)

 

During aggressive on road driving, the AWD system may implement a heat protection mode to protect the RDU clutch from damage due to overheating. On variants not fitted with power transfer unit or RDU temperature sensors, the AWD module performs calculations to determine the need for the heat protection mode. If the AWD system detects an overheat condition, it enters a locked mode. If the heat in the RDU continues to rise once in the locked mode, the AWD module disables the torque commands to RDU. This condition may be indicated by an AWD Temporarily Disabled message in the message center. To resume normal operation, stop the vehicle in a safe location and turn the engine off for at least 10 minutes. After the engine is restarted and the AWD system has adequately cooled down, the AWD Temporarily Disabled message turns off and normal AWD operation returns. In the event the engine is turned off during the stop, the AWD Temporarily Disabled message turns off when the system cools. Normal AWD operation returns once the message center displays AWD Restored.

 

Information Messages - AWD

 

[Mickalo]

I just pulled out of a parking lot, no towing at all, doing about 30mph down the street, disable message came on, drove another few minutes stopped for traffic lite then the restored message popped up. Not really sure what have caused this

[Wubster100]

Are you able to scan for DTCs?

[Mickalo]

Use to have scanner till I lost it. It's going to dealer tomorrow for oil change and check battery will have them check it out then.

[enigma-2]

This popped up here a year or two ago. It was seen on the 2019 Edge / Nautilus in very cold weather, and caused by a software upgrade.

 

 

.

Edited Wednesday at 09:27 PM by enigma-2

[Mickalo]

Found out our battery was in bad shape had it replaced no problems since then. The BMS kicks in and starts doing all kinds of weird stuff

[Wubster100]

When the battery is replaced, the BMS must be reset.

 

To reset the BMS without using a diagnostic scan tool:

 

1. Make sure all windows & doors are closed.
2. Turn ignition switch to on (don't start car). Wait 10 seconds.
3. Flash high beams 5 times using the "flash to pass" stalk on the side of the steering wheel (on/off, on/off, on/off, on/off, on/off).
4. Press brake pedal 3 times in 10  seconds.
5. The battery light on instrument cluster will flash indicating the BMS has been reset.

 

Battery Replacement

 

If the vehicle battery is replaced, it is very important to perform the battery monitoring system reset using the diagnostic scan tool. If the battery monitoring system reset is not carried out, it holds the old battery parameters and time in service counter in memory. Additionally it tells the system the battery is in an aged state and may limit the Electrical Energy Management system functions.

 

Battery State of Charge

The Electrical Energy Management system monitors the battery current flow and voltage to determine the battery state of charge. During the drive cycle the Electrical Energy Management system software monitors the charge and discharge current and increases the state of charge during charging, and decreasing it during discharge. During rest periods (key off with no electrical loads) when the vehicle enters sleep mode, the battery voltage is sampled to calibrate the state of charge. The sensor automatically executes this calibration anytime the vehicle enters sleep mode and when the total vehicle current draw is below 300mA. It takes 4 to 6 hours in the sleep mode to calibrate the battery state of charge to high accuracy. If the system draw does not allow the battery state of charge calibration over the previous 7 to 10 days the state of charge quality factor changes to flag this and some Electrical Energy Management system functions, which rely on the accuracy of the battery state of charge, may be temporarily turned off until a calibration takes place.

 

Battery Monitoring Sensor

NOTICE: Unless the battery is being replaced, DO NOT reset the battery monitoring system using the diagnostic scan tool. This reset is reserved for new battery installation only. This reset will clear the learned battery data, the battery time in service, and will affect the aging algorithm parameters, which have been learned since the installation of the battery.

 

The battery monitoring sensor is integrated with the negative battery terminal clamp and cable assembly, which provides a ground to the sensor. The battery monitoring sensor measures voltage, current, and temperature of the battery and uses these inputs to calculate the battery condition. The sensor transmits this information through the LIN circuit to the BCM. The battery monitoring sensor has a 2-pin connector providing battery voltage and LIN connections.

[Mickalo]

This was all done at the dealership. Been using them for 7+ yrs now yea you pay a bit more but it's done right well worth it.

[Haz]

From the 2019 Edge Workshop Manual...

 

Placing your device cursor over underlined acronyms may yield popup full-words descriptions of the acronyms.

 

Battery Load Shed

 

The main purpose of controlling electrical consumption with a load management strategy is to:

• Limit battery discharge
• Monitor the battery charge status

The alternator is not dimensioned to support all loads in all situations. In some situations energy has to be drawn from the battery. These are mainly during:

• engine idle
• cold climate with a lot of electrical heating functions active
• warm conditions with the engine cooling fan running
• large transient loads (i.e. EPAS )

During cold conditions, the charge acceptance of the battery is very low which increases the time needed to recharge the battery. This means that it can take up to several hours of driving before the battery is recharged.

 

The electrical consumption control is using Ignition_Status, Remote_Start_Status and EngineStateInternal in order to define the load management strategy during the different operating states of the vehicle.

 

The BCM is the primary module that is responsible for controlling the load management strategy. The BCM processes measurements of the system and uses the information for calculations and load prioritization

 

The strategy allows drain to occur from the battery. Load Management minimizes the drain by controlling the time and magnitude of the drain that can occur. The battery drain changes depending on the driving cycle and the types of loads the driver has activated, therefore, the BCM must be able to shut down or reduce the loads if necessary. The intent of the initial load shed stage, LSHED1, is to reduce electrical loads in a manner that is not noticed by the vehicle operator. During LSHED1, requests are sent in a prioritized order for the appropriate modules to begin shedding available loads. In order to prevent customer satisfaction issues, the loads are requested to reduce power consumption with minimum impact to the customer.

 

The second load shed event, LSHED2, occurs in two stages, SHED2_TRANS and SHED2_CONTIN. During operation of a vehicle equipped with large transient loads, there are transient peaks for current draw. The Load Management algorithm reacts to these spikes by using the SHED2_TRANS state. This state requires all non-critical loads to shed immediately, without customer indication, so that large transient loads can operate normally with little to no adverse impact to the customer. SHED2_CONTIN is a continuous deactivation of the loads to ensure the vehicle is able to re-start once the ignition is turned off. During SHED2_CONTIN, a message is displayed to the vehicle operator notifying them of the vehicle's charging system status.

 

Independent of load shed requests, the Load Management control can request boosts to the engine idle speed. Boosting the engine idle speed allows for increased output of the alternator to deliver more current to the battery. Idle speed increases are done through network IBoost messages.

 

The load shed charts provide a general overview of the features available on the vehicle based on the build options.

 

Load Shed Charts

 

  Priority List Load Shedding 1

 

 

  Priority List Load Shedding 2

 

 

  Priority List Load Shedding Engine Off

 

Good luck!

 

Battery Load Shed - Description and Operation - 2019 Edge Workshop Manual.pdf

[Haz]

1 hour ago, enigma-2 said:

This popped up here a year or two ago. It was seen on the 2019 Edge / Nautilus in very cold weather, and caused by a software upgrade.

 

 

Special Service Message 51117 - Effective October 4, 2022...

SSM 51117 - 2019-2022 Various Vehicles - Illuminated All Wheel Drive (AWD) Warning Indicator Or Fault Message With Certain DTCs

Some 2021-2022 Bronco Sport 1.5L, 2019-2022 Edge/Nautilus, 2020-2022 Escape/Corsair, and 2022 Maverick vehicles may exhibit an illuminated AWD warning indicator or fault message with diagnostic trouble code (DTC) C0095:71/:19 stored in the all wheel drive (AWD) module. Some 2021-2022 Bronco Sport 2.0L may exhibit an illuminated AWD warning indicator or fault message with DTC C05D9:71, C05E8:71, C05D8:19 and/or C05E7:19 stored in the AWD module. This may be due to a rear drive unit (RDU) motor magnet ring misalignment. RDU assembly replacement is no longer required. To correct the condition, replace the RDU motor which is now available separately for service. Refer to Workshop Manual, Section 205-02 for diagnosis and repair procedures. For claiming use causal part 4C210 and applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.

 

Good luck!