Foxwell NT520 Pro - sleep mode command

[X5chemist]

Today, I finally had time to scan my X5 sleep mode. Here are Foxwell menu options for sleep mode. I activated the option. My X5 went to sleep for 2 seconds then woke up again. Several times the same thing happened. The P light would turn off and come back on. One time it stayed asleep for a few seconds. The cycle woke up when the left front door was closed. The door was actually open when it stayed a sleep for a few seconds. The cycle as broken when the door was closed. I wanted to test longer but my wifey closed the door. When I tried it again, the X5 would not stay asleep. Going through the menu options, The final list of electronics displayed one error. The “Deactivation criterion for window operation: error” appeared.

So my next steps are to find the fuse or door module and pull the power. How many modules are installed? Where is the main module? Is it part of the GM3 module? During sleep activation I could hear two possible clicks. One click behind the glove box. One possible click in the rear relay area. I plan to use a clamp meter to test amp draw.

Does anyone have any guidance or information to help solve this non sleep mode problem?

Below is information on how to scan and test sleep mode.


BMW option
Start New Session
Option 1: Automatic selection
Information: X5 info will display
Menu: Main Group: Option 1 : Auto Scan
Main Groups: Option 3 Service
Service Function: Option 4 : Body
Scroll down: Option 9 ZKE Control Body Electrics
ZKE Central Body electronics menu: Option: 2 : Sleep Mode

ZKE Central body electronics: scroll down
The following message will appear:

“To lower the constant battery draw when the vehicle is parked, the complete ZKE system will go into Sleep mode 16 minutes after the ignition has been switched off and no further ZKE function is active. Approximate current draw is Ignition switched off - approximately 750 mA. One minute after = approx 560 mA. After 16 minutes (sleep mode) = approximately 18 mA. When sleep mode is active all modules within the ZKE system will be forced asleep. The P-Bus remains active, however no data request is received. Door modules or keyless remote module can wake up the system.

The last step will be command functions

“To force control unit to sleep:
1. Turn off ignition
2. Force control unit to sleep. Press F3 “Activate”.

In the “ZKE Central body electronics” window, all the installed features will be displayed.

Rain sensor: fitted
Intensive cleaning system: not fitted
Headlight cleaning system: fitted
Servotronic: not fitted
Rear window regulators: fitted:
Mirror fold in: fitted
Mirror heater: fitted
Mirror memory: fitted
Sliding /. Tilting sunroof: not fitted
Sliding /. Tilting sunroof: not fitted
Deactivation criterion for window operation: error